diff --git a/docs/iron-component-page/iron-component-page.html b/docs/iron-component-page/iron-component-page.html
index 10ee4449..fa45fc1a 100644
--- a/docs/iron-component-page/iron-component-page.html
+++ b/docs/iron-component-page/iron-component-page.html
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    * @summary Polymer is a lightweight library built on top of the web
    *   standards-based Web Components API's, and makes it easy to build your
@@ -30,7 +30,7 @@
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-  */window.JSCompiler_renameProperty=function(prop,obj){return prop};/* eslint-enable */})();</script><script>(function(){'use strict';var CSS_URL_RX=/(url\()([^)]*)(\))/g,ABS_URL=/(^\/)|(^#)|(^[\w-\d]*:)/,workingURL,resolveDoc;/**
+  */window.JSCompiler_renameProperty=function(prop,obj){return prop};/* eslint-enable */})();</script><script>(function(){"use strict";var CSS_URL_RX=/(url\()([^)]*)(\))/g,ABS_URL=/(^\/)|(^#)|(^[\w-\d]*:)/,workingURL,resolveDoc;/**
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      * 
      * Note that this function performs no resolution for URLs that start
@@ -65,7 +65,7 @@
      * @namespace
      * @memberof Polymer
      * @summary Module with utilities for resolving relative URL's.
-     */Polymer.ResolveUrl={resolveCss:resolveCss,resolveUrl:resolveUrl,pathFromUrl:pathFromUrl}})();</script><script>/** @suppress {deprecated} */(function(){'use strict';/**
+     */Polymer.ResolveUrl={resolveCss:resolveCss,resolveUrl:resolveUrl,pathFromUrl:pathFromUrl}})();</script><script>/** @suppress {deprecated} */(function(){"use strict";/**
    * Sets the global, legacy settings.
    *
    * @deprecated
@@ -137,7 +137,7 @@
   * @param {boolean} useCancelSyntheticClickEvents enable or disable cancelling synthetic
   * events
   * @return {void}
-  */Polymer.setCancelSyntheticClickEvents=function(useCancelSyntheticClickEvents){Polymer.cancelSyntheticClickEvents=useCancelSyntheticClickEvents}})();</script><script>(function(){'use strict';// unique global id for deduping mixins.
+  */Polymer.setCancelSyntheticClickEvents=function(useCancelSyntheticClickEvents){Polymer.cancelSyntheticClickEvents=useCancelSyntheticClickEvents}})();</script><script>(function(){"use strict";// unique global id for deduping mixins.
 var dedupeId=0;/**
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    * @extends {Function}
@@ -156,7 +156,7 @@
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+var mixinSet=Object.create(/** @type {!MixinFunction} */extended.__mixinSet||baseSet||null);mixinSet[mixinDedupeId]=!0;/** @type {!MixinFunction} */extended.__mixinSet=mixinSet;return extended}return(/** @type {T} */dedupingMixin)};/* eslint-enable valid-jsdoc */})();</script><script>(function(){"use strict";var MODULE_STYLE_LINK_SELECTOR="link[rel=import][type~=css]",INCLUDE_ATTR="include",SHADY_UNSCOPED_ATTR="shady-unscoped";function importModule(moduleId){var/** Polymer.DomModule */PolymerDomModule=customElements.get("dom-module");if(!PolymerDomModule){return null}return PolymerDomModule.import(moduleId)}function styleForImport(importDoc){// NOTE: polyfill affordance.
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@@ -267,7 +267,7 @@
    * @namespace
    * @memberof Polymer
    * @summary Module with utilities for collection CSS text from various sources.
-   */Polymer.StyleGather=StyleGather})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var modules={},lcModules={};function setModule(id,module){// store id separate from lowercased id so that
+   */Polymer.StyleGather=StyleGather})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var modules={},lcModules={};function setModule(id,module){// store id separate from lowercased id so that
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@@ -295,13 +295,13 @@
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    * @unrestricted
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+   */var DomModule=/*#__PURE__*/function(_HTMLElement){babelHelpers.inherits(DomModule,_HTMLElement);var _super=_createSuper(DomModule);function DomModule(){babelHelpers.classCallCheck(this,DomModule);return _super.apply(this,arguments)}babelHelpers.createClass(DomModule,[{key:"attributeChangedCallback",value:/* eslint-disable no-unused-vars */ /**
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      * @param {?string} old Old value of attribute.
      * @param {?string} value Current value of attribute.
      * @param {?string} namespace Attribute namespace.
      * @return {void}
-     */value:function attributeChangedCallback(name,old,value,namespace){if(old!==value){this.register()}}/* eslint-enable no-unused-args */ /**
+     */function attributeChangedCallback(name,old,value,namespace){if(old!==value){this.register()}}/* eslint-enable no-unused-args */ /**
      * The absolute URL of the original location of this `dom-module`.
      *
      * This value will differ from this element's `ownerDocument` in the
@@ -311,25 +311,25 @@
      * - Uses the HTMLImports polyfill's `importForElement` API to ensure
      *   the path is relative to the import document's location since
      *   `ownerDocument` is not currently polyfilled
-     */},{key:"register",/**
+     */},{key:"assetpath",get:function get(){// Don't override existing assetpath.
+if(!this.__assetpath){// note: assetpath set via an attribute must be relative to this
+// element's location; accomodate polyfilled HTMLImports
+var owner=window.HTMLImports&&HTMLImports.importForElement?HTMLImports.importForElement(this)||document:this.ownerDocument,url=Polymer.ResolveUrl.resolveUrl(this.getAttribute("assetpath")||"",owner.baseURI);this.__assetpath=Polymer.ResolveUrl.pathFromUrl(url)}return this.__assetpath}/**
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      * example, `document.createElement('dom-module').register('foo')`.
      * @param {string=} id The id at which to register the dom-module.
      * @return {void}
-     */value:function register(id){id=id||this.id;if(id){// Under strictTemplatePolicy, reject and null out any re-registered
+     */},{key:"register",value:function register(id){id=id||this.id;if(id){// Under strictTemplatePolicy, reject and null out any re-registered
 // dom-module since it is ambiguous whether first-in or last-in is trusted 
-if(Polymer.strictTemplatePolicy&&findModule(id)!==void 0){setModule(id,null);throw new Error("strictTemplatePolicy: dom-module ".concat(id," re-registered"))}this.id=id;setModule(id,this);styleOutsideTemplateCheck(this)}}},{key:"assetpath",get:function get(){// Don't override existing assetpath.
-if(!this.__assetpath){// note: assetpath set via an attribute must be relative to this
-// element's location; accomodate polyfilled HTMLImports
-var owner=window.HTMLImports&&HTMLImports.importForElement?HTMLImports.importForElement(this)||document:this.ownerDocument,url=Polymer.ResolveUrl.resolveUrl(this.getAttribute("assetpath")||"",owner.baseURI);this.__assetpath=Polymer.ResolveUrl.pathFromUrl(url)}return this.__assetpath}}],[{key:"import",/**
+if(Polymer.strictTemplatePolicy&&findModule(id)!==void 0){setModule(id,null);throw new Error("strictTemplatePolicy: dom-module ".concat(id," re-registered"))}this.id=id;setModule(id,this);styleOutsideTemplateCheck(this)}}}],[{key:"observedAttributes",get:function get(){return["id"]}/**
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      * registered by `id`. For example, this.import('foo', 'img');
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      * @param {string=} selector The css selector by which to find the element.
      * @return {Element} Returns the element which matches `selector` in the
      * module registered at the specified `id`.
-     */value:function _import(id,selector){if(id){var m=findModule(id);if(m&&selector){return m.querySelector(selector)}return m}return null}},{key:"observedAttributes",get:function get(){return["id"]}}]);return DomModule}(/*#__PURE__*/babelHelpers.wrapNativeSuper(HTMLElement));DomModule.prototype.modules=modules;customElements.define("dom-module",DomModule);/** @const */Polymer.DomModule=DomModule})();</script><script>(function(){'use strict';/**
+     */},{key:"import",value:function _import(id,selector){if(id){var m=findModule(id);if(m&&selector){return m.querySelector(selector)}return m}return null}}]);return DomModule}(/*#__PURE__*/babelHelpers.wrapNativeSuper(HTMLElement));DomModule.prototype.modules=modules;customElements.define("dom-module",DomModule);/** @const */Polymer.DomModule=DomModule})();</script><script>(function(){"use strict";/**
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    *
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@@ -488,7 +488,7 @@
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    * @param {string} path Path string
    * @return {boolean} True if the string contained one or more dots
-   */Path.isDeep=Path.isPath;Polymer.Path=Path})();</script><script>(function(){'use strict';var caseMap={},DASH_TO_CAMEL=/-[a-z]/g,CAMEL_TO_DASH=/([A-Z])/g,CaseMap={/**
+   */Path.isDeep=Path.isPath;Polymer.Path=Path})();</script><script>(function(){"use strict";var caseMap={},DASH_TO_CAMEL=/-[a-z]/g,CAMEL_TO_DASH=/([A-Z])/g,CaseMap={/**
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      * (e.g. `fooBarBaz`).
      *
@@ -502,8 +502,8 @@
      * @memberof Polymer.CaseMap
      * @param {string} camel Camel-case identifier
      * @return {string} Dash-case representation of the identifier
-     */camelToDashCase:function camelToDashCase(camel){return caseMap[camel]||(caseMap[camel]=camel.replace(CAMEL_TO_DASH,"-$1").toLowerCase())}};Polymer.CaseMap=CaseMap})();</script><script>(function(){'use strict';// Microtask implemented using Mutation Observer
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+     */camelToDashCase:function camelToDashCase(camel){return caseMap[camel]||(caseMap[camel]=camel.replace(CAMEL_TO_DASH,"-$1").toLowerCase())}};Polymer.CaseMap=CaseMap})();</script><script>(function(){"use strict";// Microtask implemented using Mutation Observer
+var microtaskCurrHandle=0,microtaskLastHandle=0,microtaskCallbacks=[],microtaskNodeContent=0,microtaskNode=document.createTextNode("");new window.MutationObserver(microtaskFlush).observe(microtaskNode,{characterData:!0});function microtaskFlush(){for(var len=microtaskCallbacks.length,_loop=function _loop(){var cb=microtaskCallbacks[i];if(cb){try{cb()}catch(e){setTimeout(function(){throw e})}}},i=0;i<len;i++){_loop()}microtaskCallbacks.splice(0,len);microtaskLastHandle+=len}/**
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    * tasks.  Each sub-module provides a standard `run(fn)` interface that returns a
    * handle, and a `cancel(handle)` interface for canceling async tasks before
@@ -601,7 +601,7 @@
        * @memberof Polymer.Async.microTask
        * @param {number} handle Handle returned from `run` of callback to cancel
        * @return {void}
-       */cancel:function cancel(handle){var idx=handle-microtaskLastHandle;if(0<=idx){if(!microtaskCallbacks[idx]){throw new Error("invalid async handle: "+handle)}microtaskCallbacks[idx]=null}}}}})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';/** @const {!AsyncInterface} */var microtask=Polymer.Async.microTask;/**
+       */cancel:function cancel(handle){var idx=handle-microtaskLastHandle;if(0<=idx){if(!microtaskCallbacks[idx]){throw new Error("invalid async handle: "+handle)}microtaskCallbacks[idx]=null}}}}})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";/** @const {!AsyncInterface} */var microtask=Polymer.Async.microTask;/**
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      * (batched) `_propertiesChanged` callback.
@@ -625,7 +625,20 @@
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        * @implements {Polymer_PropertiesChanged}
        * @unrestricted
-       */var PropertiesChanged=/*#__PURE__*/function(_superClass){babelHelpers.inherits(PropertiesChanged,_superClass);var _super=_createSuper(PropertiesChanged);babelHelpers.createClass(PropertiesChanged,[{key:"_createPropertyAccessor",//eslint-disable-line no-unused-vars
+       */var PropertiesChanged=/*#__PURE__*/function(_superClass){babelHelpers.inherits(PropertiesChanged,_superClass);var _super=_createSuper(PropertiesChanged);function PropertiesChanged(){var _this;babelHelpers.classCallCheck(this,PropertiesChanged);_this=_super.call(this);_this.__dataEnabled=!1;_this.__dataReady=!1;_this.__dataInvalid=!1;_this.__data={};_this.__dataPending=null;_this.__dataOld=null;_this.__dataInstanceProps=null;_this.__serializing=!1;_this._initializeProperties();return _this}/**
+         * Lifecycle callback called when properties are enabled via
+         * `_enableProperties`.
+         *
+         * Users may override this function to implement behavior that is
+         * dependent on the element having its property data initialized, e.g.
+         * from defaults (initialized from `constructor`, `_initializeProperties`),
+         * `attributeChangedCallback`, or values propagated from host e.g. via
+         * bindings.  `super.ready()` must be called to ensure the data system
+         * becomes enabled.
+         *
+         * @return {void}
+         * @public
+         */babelHelpers.createClass(PropertiesChanged,[{key:"_createPropertyAccessor",value://eslint-disable-line no-unused-vars
 /**
          * Creates a setter/getter pair for the named property with its own
          * local storage.  The getter returns the value in the local storage,
@@ -641,7 +654,7 @@
          *   protected `_setProperty` function must be used to set the property
          * @return {void}
          * @protected
-         */value:function _createPropertyAccessor(property,readOnly){this._addPropertyToAttributeMap(property);if(!this.hasOwnProperty("__dataHasAccessor")){this.__dataHasAccessor=Object.assign({},this.__dataHasAccessor)}if(!this.__dataHasAccessor[property]){this.__dataHasAccessor[property]=!0;this._definePropertyAccessor(property,readOnly)}}/**
+         */function _createPropertyAccessor(property,readOnly){this._addPropertyToAttributeMap(property);if(!this.hasOwnProperty("__dataHasAccessor")){this.__dataHasAccessor=Object.assign({},this.__dataHasAccessor)}if(!this.__dataHasAccessor[property]){this.__dataHasAccessor[property]=!0;this._definePropertyAccessor(property,readOnly)}}/**
          * Adds the given `property` to a map matching attribute names
          * to property names, using `attributeNameForProperty`. This map is
          * used when deserializing attribute values to properties.
@@ -652,40 +665,7 @@
          * @param {string} property Name of the property
          * @param {boolean=} readOnly When true, no setter is created
          * @return {void}
-         */},{key:"_definePropertyAccessor",value:function _definePropertyAccessor(property,readOnly){Object.defineProperty(this,property,{/* eslint-disable valid-jsdoc */ /** @this {PropertiesChanged} */get:function get(){return this._getProperty(property)},/** @this {PropertiesChanged} */set:readOnly?function(){}:function(value){this._setProperty(property,value)}/* eslint-enable */})}}],[{key:"createProperties",/**
-         * Creates property accessors for the given property names.
-         * @param {!Object} props Object whose keys are names of accessors.
-         * @return {void}
-         * @protected
-         */value:function createProperties(props){var proto=this.prototype;for(var prop in props){// don't stomp an existing accessor
-if(!(prop in proto)){proto._createPropertyAccessor(prop)}}}/**
-         * Returns an attribute name that corresponds to the given property.
-         * The attribute name is the lowercased property name. Override to
-         * customize this mapping.
-         * @param {string} property Property to convert
-         * @return {string} Attribute name corresponding to the given property.
-         *
-         * @protected
-         */},{key:"attributeNameForProperty",value:function attributeNameForProperty(property){return property.toLowerCase()}/**
-         * Override point to provide a type to which to deserialize a value to
-         * a given property.
-         * @param {string} name Name of property
-         *
-         * @protected
-         */},{key:"typeForProperty",value:function typeForProperty(name){}}]);function PropertiesChanged(){var _this;babelHelpers.classCallCheck(this,PropertiesChanged);_this=_super.call(this);_this.__dataEnabled=!1;_this.__dataReady=!1;_this.__dataInvalid=!1;_this.__data={};_this.__dataPending=null;_this.__dataOld=null;_this.__dataInstanceProps=null;_this.__serializing=!1;_this._initializeProperties();return _this}/**
-         * Lifecycle callback called when properties are enabled via
-         * `_enableProperties`.
-         *
-         * Users may override this function to implement behavior that is
-         * dependent on the element having its property data initialized, e.g.
-         * from defaults (initialized from `constructor`, `_initializeProperties`),
-         * `attributeChangedCallback`, or values propagated from host e.g. via
-         * bindings.  `super.ready()` must be called to ensure the data system
-         * becomes enabled.
-         *
-         * @return {void}
-         * @public
-         */babelHelpers.createClass(PropertiesChanged,[{key:"ready",value:function ready(){this.__dataReady=!0;this._flushProperties()}/**
+         */},{key:"_definePropertyAccessor",value:function _definePropertyAccessor(property,readOnly){Object.defineProperty(this,property,{/* eslint-disable valid-jsdoc */ /** @this {PropertiesChanged} */get:function get(){return this._getProperty(property)},/** @this {PropertiesChanged} */set:readOnly?function(){}:function(value){this._setProperty(property,value)}/* eslint-enable */})}},{key:"ready",value:function ready(){this.__dataReady=!0;this._flushProperties()}/**
          * Initializes the local storage for property accessors.
          *
          * Provided as an override point for performing any setup work prior
@@ -863,7 +843,27 @@
          * @param {?string} value Value to deserialize.
          * @param {*=} type Type to deserialize the string to.
          * @return {*} Typed value deserialized from the provided string.
-         */},{key:"_deserializeValue",value:function _deserializeValue(value,type){switch(type){case Boolean:return null!==value;case Number:return+value;default:return value;}}}]);return PropertiesChanged}(superClass);return PropertiesChanged})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var caseMap=Polymer.CaseMap,nativeProperties={},proto=HTMLElement.prototype;// Save map of native properties; this forms a blacklist or properties
+         */},{key:"_deserializeValue",value:function _deserializeValue(value,type){switch(type){case Boolean:return null!==value;case Number:return+value;default:return value;}}}],[{key:"createProperties",value:/**
+         * Creates property accessors for the given property names.
+         * @param {!Object} props Object whose keys are names of accessors.
+         * @return {void}
+         * @protected
+         */function createProperties(props){var proto=this.prototype;for(var prop in props){// don't stomp an existing accessor
+if(!(prop in proto)){proto._createPropertyAccessor(prop)}}}/**
+         * Returns an attribute name that corresponds to the given property.
+         * The attribute name is the lowercased property name. Override to
+         * customize this mapping.
+         * @param {string} property Property to convert
+         * @return {string} Attribute name corresponding to the given property.
+         *
+         * @protected
+         */},{key:"attributeNameForProperty",value:function attributeNameForProperty(property){return property.toLowerCase()}/**
+         * Override point to provide a type to which to deserialize a value to
+         * a given property.
+         * @param {string} name Name of property
+         *
+         * @protected
+         */},{key:"typeForProperty",value:function typeForProperty(name){}}]);return PropertiesChanged}(superClass);return PropertiesChanged})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var caseMap=Polymer.CaseMap,nativeProperties={},proto=HTMLElement.prototype;// Save map of native properties; this forms a blacklist or properties
 // that won't have their values "saved" by `saveAccessorValue`, since
 // reading from an HTMLElement accessor from the context of a prototype throws
 while(proto){for(var props=Object.getOwnPropertyNames(proto),i=0;i<props.length;i++){nativeProperties[props[i]]=!0}proto=Object.getPrototypeOf(proto)}/**
@@ -917,14 +917,14 @@
      * @implements {Polymer_PropertiesChanged}
      * @unrestricted
      * @private
-     */var base=Polymer.PropertiesChanged(superClass),PropertyAccessors=/*#__PURE__*/function(_base){babelHelpers.inherits(PropertyAccessors,_base);var _super=_createSuper(PropertyAccessors);function PropertyAccessors(){babelHelpers.classCallCheck(this,PropertyAccessors);return _super.apply(this,arguments)}babelHelpers.createClass(PropertyAccessors,[{key:"_initializeProperties",/**
+     */var base=Polymer.PropertiesChanged(superClass),PropertyAccessors=/*#__PURE__*/function(_base){babelHelpers.inherits(PropertyAccessors,_base);var _super=_createSuper(PropertyAccessors);function PropertyAccessors(){babelHelpers.classCallCheck(this,PropertyAccessors);return _super.apply(this,arguments)}babelHelpers.createClass(PropertyAccessors,[{key:"_initializeProperties",value:/**
        * Overrides PropertiesChanged implementation to initialize values for
        * accessors created for values that already existed on the element
        * prototype.
        *
        * @return {void}
        * @protected
-       */value:function _initializeProperties(){if(this.__dataProto){this._initializeProtoProperties(this.__dataProto);this.__dataProto=null}babelHelpers.get(babelHelpers.getPrototypeOf(PropertyAccessors.prototype),"_initializeProperties",this).call(this)}/**
+       */function _initializeProperties(){if(this.__dataProto){this._initializeProtoProperties(this.__dataProto);this.__dataProto=null}babelHelpers.get(babelHelpers.getPrototypeOf(PropertyAccessors.prototype),"_initializeProperties",this).call(this)}/**
        * Called at instance time with bag of properties that were overwritten
        * by accessors on the prototype when accessors were created.
        *
@@ -992,7 +992,7 @@
        * @param {string} prop Property name
        * @return {boolean} True if property has a pending change
        * @protected
-       */},{key:"_isPropertyPending",value:function _isPropertyPending(prop){return!!(this.__dataPending&&prop in this.__dataPending)}}],[{key:"createPropertiesForAttributes",/**
+       */},{key:"_isPropertyPending",value:function _isPropertyPending(prop){return!!(this.__dataPending&&prop in this.__dataPending)}}],[{key:"createPropertiesForAttributes",value:/**
        * Generates property accessors for all attributes in the standard
        * static `observedAttributes` array.
        *
@@ -1000,7 +1000,7 @@
        * `camelCase` convention
        *
        * @return {void}
-       */value:function createPropertiesForAttributes(){for(var a$=this.observedAttributes,_i=0;_i<a$.length;_i++){this.prototype._createPropertyAccessor(caseMap.dashToCamelCase(a$[_i]))}}/**
+       */function createPropertiesForAttributes(){for(var a$=this.observedAttributes,_i=0;_i<a$.length;_i++){this.prototype._createPropertyAccessor(caseMap.dashToCamelCase(a$[_i]))}}/**
        * Returns an attribute name that corresponds to the given property.
        * By default, converts camel to dash case, e.g. `fooBar` to `foo-bar`.
        * @param {string} property Property to convert
@@ -1013,7 +1013,7 @@
      * @implements {Polymer_PropertyAccessors}
      * @extends {base}
      * @unrestricted
-     */return PropertyAccessors})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var walker=document.createTreeWalker(document,NodeFilter.SHOW_ALL,null,!1),templateExtensions={"dom-if":!0,"dom-repeat":!0};// 1.x backwards-compatible auto-wrapper for template type extensions
+     */return PropertyAccessors})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var walker=document.createTreeWalker(document,NodeFilter.SHOW_ALL,null,!1),templateExtensions={"dom-if":!0,"dom-repeat":!0};// 1.x backwards-compatible auto-wrapper for template type extensions
 // This is a clear layering violation and gives favored-nation status to
 // dom-if and dom-repeat templates.  This is a conceit we're choosing to keep
 // a.) to ease 1.x backwards-compatibility due to loss of `is`, and
@@ -1046,7 +1046,7 @@
      * @polymer
      * @mixinClass
      * @implements {Polymer_TemplateStamp}
-     */var TemplateStamp=/*#__PURE__*/function(_superClass){babelHelpers.inherits(TemplateStamp,_superClass);var _super=_createSuper(TemplateStamp);function TemplateStamp(){babelHelpers.classCallCheck(this,TemplateStamp);return _super.apply(this,arguments)}babelHelpers.createClass(TemplateStamp,[{key:"_stampTemplate",/**
+     */var TemplateStamp=/*#__PURE__*/function(_superClass){babelHelpers.inherits(TemplateStamp,_superClass);var _super=_createSuper(TemplateStamp);function TemplateStamp(){babelHelpers.classCallCheck(this,TemplateStamp);return _super.apply(this,arguments)}babelHelpers.createClass(TemplateStamp,[{key:"_stampTemplate",value:/**
        * Clones the provided template content and returns a document fragment
        * containing the cloned dom.
        *
@@ -1067,7 +1067,7 @@
        *
        * @param {!HTMLTemplateElement} template Template to stamp
        * @return {!StampedTemplate} Cloned template content
-       */value:function _stampTemplate(template){// Polyfill support: bootstrap the template if it has not already been
+       */function _stampTemplate(template){// Polyfill support: bootstrap the template if it has not already been
 if(template&&!template.content&&window.HTMLTemplateElement&&HTMLTemplateElement.decorate){HTMLTemplateElement.decorate(template)}var templateInfo=this.constructor._parseTemplate(template),nodeInfo=templateInfo.nodeInfoList,content=templateInfo.content||template.content,dom=/** @type {DocumentFragment} */document.importNode(content,!0);// NOTE: ShadyDom optimization indicating there is an insertion point
 dom.__noInsertionPoint=!templateInfo.hasInsertionPoint;var nodes=dom.nodeList=Array(nodeInfo.length);dom.$={};for(var i=0,l=nodeInfo.length,info,node;i<l&&(info=nodeInfo[i]);i++){node=nodes[i]=findTemplateNode(dom,info);applyIdToMap(this,dom.$,node,info);applyTemplateContent(this,node,info);applyEventListener(this,node,info)}dom=/** @type {!StampedTemplate} */dom;// eslint-disable-line no-self-assign
 return dom}/**
@@ -1096,7 +1096,7 @@
        * @param {string} eventName Name of event
        * @param {function(!Event):void} handler Listener function to remove
        * @return {void}
-       */},{key:"_removeEventListenerFromNode",value:function _removeEventListenerFromNode(node,eventName,handler){node.removeEventListener(eventName,handler)}}],[{key:"_parseTemplate",/**
+       */},{key:"_removeEventListenerFromNode",value:function _removeEventListenerFromNode(node,eventName,handler){node.removeEventListener(eventName,handler)}}],[{key:"_parseTemplate",value:/**
        * Scans a template to produce template metadata.
        *
        * Template-specific metadata are stored in the object returned, and node-
@@ -1170,7 +1170,7 @@
        * @param {TemplateInfo=} outerTemplateInfo Template metadata from the outer
        *   template, for parsing nested templates
        * @return {!TemplateInfo} Parsed template metadata
-       */value:function _parseTemplate(template,outerTemplateInfo){// since a template may be re-used, memo-ize metadata
+       */function _parseTemplate(template,outerTemplateInfo){// since a template may be re-used, memo-ize metadata
 if(!template._templateInfo){var templateInfo=template._templateInfo={};templateInfo.nodeInfoList=[];templateInfo.stripWhiteSpace=outerTemplateInfo&&outerTemplateInfo.stripWhiteSpace||template.hasAttribute("strip-whitespace");this._parseTemplateContent(template,templateInfo,{parent:null})}return template._templateInfo}},{key:"_parseTemplateContent",value:function _parseTemplateContent(template,templateInfo,nodeInfo){return this._parseTemplateNode(template.content,templateInfo,nodeInfo)}/**
        * Parses template node and adds template and node metadata based on
        * the current node, and its `childNodes` and `attributes`.
@@ -1255,7 +1255,7 @@
        *
        * @param {HTMLTemplateElement} template Template to retrieve `content` for
        * @return {DocumentFragment} Content fragment
-       */},{key:"_contentForTemplate",value:function _contentForTemplate(template){var templateInfo=/** @type {HTMLTemplateElementWithInfo} */template._templateInfo;return templateInfo&&templateInfo.content||template.content}}]);return TemplateStamp}(superClass);return TemplateStamp})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';/** @const {Object} */var CaseMap=Polymer.CaseMap,dedupeId=0,TYPES={COMPUTE:"__computeEffects",REFLECT:"__reflectEffects",NOTIFY:"__notifyEffects",PROPAGATE:"__propagateEffects",OBSERVE:"__observeEffects",READ_ONLY:"__readOnly"},capitalAttributeRegex=/[A-Z]/,DataTrigger,DataEffect,PropertyEffectsType;// Monotonically increasing unique ID used for de-duping effects triggered
+       */},{key:"_contentForTemplate",value:function _contentForTemplate(template){var templateInfo=/** @type {HTMLTemplateElementWithInfo} */template._templateInfo;return templateInfo&&templateInfo.content||template.content}}]);return TemplateStamp}(superClass);return TemplateStamp})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";/** @const {Object} */var CaseMap=Polymer.CaseMap,dedupeId=0,TYPES={COMPUTE:"__computeEffects",REFLECT:"__reflectEffects",NOTIFY:"__notifyEffects",PROPAGATE:"__propagateEffects",OBSERVE:"__observeEffects",READ_ONLY:"__readOnly"},capitalAttributeRegex=/[A-Z]/,DataTrigger,DataEffect,PropertyEffectsType;// Monotonically increasing unique ID used for de-duping effects triggered
 // from multiple properties in the same turn
 //eslint-disable-line no-unused-vars
 /**
@@ -1741,9 +1741,9 @@
 _this.__isPropertyEffectsClient=!0;/** @type {number} */ // NOTE: used to track re-entrant calls to `_flushProperties`
 // path changes dirty check against `__dataTemp` only during one "turn"
 // and are cleared when `__dataCounter` returns to 0.
-_this.__dataCounter=0;/** @type {boolean} */_this.__dataClientsReady;/** @type {Array} */_this.__dataPendingClients;/** @type {Object} */_this.__dataToNotify;/** @type {Object} */_this.__dataLinkedPaths;/** @type {boolean} */_this.__dataHasPaths;/** @type {Object} */_this.__dataCompoundStorage;/** @type {Polymer_PropertyEffects} */_this.__dataHost;/** @type {!Object} */_this.__dataTemp;/** @type {boolean} */_this.__dataClientsInitialized;/** @type {!Object} */_this.__data;/** @type {!Object} */_this.__dataPending;/** @type {!Object} */_this.__dataOld;/** @type {Object} */_this.__computeEffects;/** @type {Object} */_this.__reflectEffects;/** @type {Object} */_this.__notifyEffects;/** @type {Object} */_this.__propagateEffects;/** @type {Object} */_this.__observeEffects;/** @type {Object} */_this.__readOnly;/** @type {!TemplateInfo} */_this.__templateInfo;return _this}babelHelpers.createClass(PropertyEffects,[{key:"_initializeProperties",/**
+_this.__dataCounter=0;/** @type {boolean} */_this.__dataClientsReady;/** @type {Array} */_this.__dataPendingClients;/** @type {Object} */_this.__dataToNotify;/** @type {Object} */_this.__dataLinkedPaths;/** @type {boolean} */_this.__dataHasPaths;/** @type {Object} */_this.__dataCompoundStorage;/** @type {Polymer_PropertyEffects} */_this.__dataHost;/** @type {!Object} */_this.__dataTemp;/** @type {boolean} */_this.__dataClientsInitialized;/** @type {!Object} */_this.__data;/** @type {!Object} */_this.__dataPending;/** @type {!Object} */_this.__dataOld;/** @type {Object} */_this.__computeEffects;/** @type {Object} */_this.__reflectEffects;/** @type {Object} */_this.__notifyEffects;/** @type {Object} */_this.__propagateEffects;/** @type {Object} */_this.__observeEffects;/** @type {Object} */_this.__readOnly;/** @type {!TemplateInfo} */_this.__templateInfo;return _this}babelHelpers.createClass(PropertyEffects,[{key:"PROPERTY_EFFECT_TYPES",get:function get(){return TYPES}/**
        * @return {void}
-       */value:function _initializeProperties(){babelHelpers.get(babelHelpers.getPrototypeOf(PropertyEffects.prototype),"_initializeProperties",this).call(this);hostStack.registerHost(this);this.__dataClientsReady=!1;this.__dataPendingClients=null;this.__dataToNotify=null;this.__dataLinkedPaths=null;this.__dataHasPaths=!1;// May be set on instance prior to upgrade
+       */},{key:"_initializeProperties",value:function _initializeProperties(){babelHelpers.get(babelHelpers.getPrototypeOf(PropertyEffects.prototype),"_initializeProperties",this).call(this);hostStack.registerHost(this);this.__dataClientsReady=!1;this.__dataPendingClients=null;this.__dataToNotify=null;this.__dataLinkedPaths=null;this.__dataHasPaths=!1;// May be set on instance prior to upgrade
 this.__dataCompoundStorage=this.__dataCompoundStorage||null;this.__dataHost=this.__dataHost||null;this.__dataTemp={};this.__dataClientsInitialized=!1}/**
        * Overrides `Polymer.PropertyAccessors` implementation to provide a
        * more efficient implementation of initializing properties from
@@ -2335,7 +2335,7 @@
        * @param {Object=} effect Effect metadata object
        * @return {void}
        * @protected
-       */},{key:"_bindTemplate",// -- binding ----------------------------------------------
+       */},{key:"_bindTemplate",value:// -- binding ----------------------------------------------
 /**
        * Equivalent to static `bindTemplate` API but can be called on
        * an instance to add effects at runtime.  See that method for
@@ -2357,7 +2357,7 @@
        * @return {!TemplateInfo} Template metadata object; for `runtimeBinding`,
        *   this is an instance of the prototypical template info
        * @protected
-       */value:function _bindTemplate(template,instanceBinding){var templateInfo=this.constructor._parseTemplate(template),wasPreBound=this.__templateInfo==templateInfo;// Optimization: since this is called twice for proto-bound templates,
+       */function _bindTemplate(template,instanceBinding){var templateInfo=this.constructor._parseTemplate(template),wasPreBound=this.__templateInfo==templateInfo;// Optimization: since this is called twice for proto-bound templates,
 // don't attempt to recreate accessors if this template was pre-bound
 if(!wasPreBound){for(var prop in templateInfo.propertyEffects){this._createPropertyAccessor(prop)}}if(instanceBinding){// For instance-time binding, create instance of template metadata
 // and link into list of templates if necessary
@@ -2373,7 +2373,7 @@
        * @param {Object=} effect Effect metadata object
        * @return {void}
        * @protected
-       */},{key:"_stampTemplate",/**
+       */},{key:"_stampTemplate",value:/**
        * Stamps the provided template and performs instance-time setup for
        * Polymer template features, including data bindings, declarative event
        * listeners, and the `this.$` map of `id`'s to nodes.  A document fragment
@@ -2392,7 +2392,7 @@
        * @return {!StampedTemplate} Cloned template content
        * @override
        * @protected
-       */value:function _stampTemplate(template){// Ensures that created dom is `_enqueueClient`'d to this element so
+       */function _stampTemplate(template){// Ensures that created dom is `_enqueueClient`'d to this element so
 // that it can be flushed on next call to `_flushProperties`
 hostStack.beginHosting(this);var dom=babelHelpers.get(babelHelpers.getPrototypeOf(PropertyEffects.prototype),"_stampTemplate",this).call(this,template);hostStack.endHosting(this);var templateInfo=/** @type {!TemplateInfo} */this._bindTemplate(template,!0);// Add template-instance-specific data to instanced templateInfo
 templateInfo.nodeList=dom.nodeList;// Capture child nodes to allow unstamping of non-prototypical templates
@@ -2424,7 +2424,7 @@
        *   metadata to `nodeInfo`
        * @protected
        * @suppress {missingProperties} Interfaces in closure do not inherit statics, but classes do
-       */},{key:"PROPERTY_EFFECT_TYPES",get:function get(){return TYPES}}],[{key:"addPropertyEffect",value:function addPropertyEffect(property,type,effect){this.prototype._addPropertyEffect(property,type,effect)}/**
+       */}],[{key:"addPropertyEffect",value:function addPropertyEffect(property,type,effect){this.prototype._addPropertyEffect(property,type,effect)}/**
        * Creates a single-property observer for the given property.
        *
        * @param {string} property Property name
@@ -2657,7 +2657,7 @@
      * @param {*} inst Instance to end hosting
      * @return {void}
      * @this {hostStack}
-     */endHosting:function endHosting(inst){var stackLen=this.stack.length;if(stackLen&&this.stack[stackLen-1]==inst){this.stack.pop()}}}})();</script><script>(function(){'use strict';/**
+     */endHosting:function endHosting(inst){var stackLen=this.stack.length;if(stackLen&&this.stack[stackLen-1]==inst){this.stack.pop()}}}})();</script><script>(function(){"use strict";/**
    * Provides basic tracking of element definitions (registrations) and
    * instance counts.
    *
@@ -2683,7 +2683,7 @@
      * Logs all elements registered with an `is` to the console.
      * @public
      * @this {this}
-     */dumpRegistrations:function dumpRegistrations(){this.registrations.forEach(this._regLog)}}})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';/**
+     */dumpRegistrations:function dumpRegistrations(){this.registrations.forEach(this._regLog)}}})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";/**
    * Creates a copy of `props` with each property normalized such that
    * upgraded it is an object with at least a type property { type: Type}.
    *
@@ -2736,12 +2736,12 @@
      * @extends {base}
      * @implements {Polymer_PropertiesMixin}
      * @unrestricted
-     */var PropertiesMixin=/*#__PURE__*/function(_base){babelHelpers.inherits(PropertiesMixin,_base);var _super=_createSuper(PropertiesMixin);function PropertiesMixin(){babelHelpers.classCallCheck(this,PropertiesMixin);return _super.apply(this,arguments)}babelHelpers.createClass(PropertiesMixin,[{key:"_initializeProperties",/**
+     */var PropertiesMixin=/*#__PURE__*/function(_base){babelHelpers.inherits(PropertiesMixin,_base);var _super=_createSuper(PropertiesMixin);function PropertiesMixin(){babelHelpers.classCallCheck(this,PropertiesMixin);return _super.apply(this,arguments)}babelHelpers.createClass(PropertiesMixin,[{key:"_initializeProperties",value:/**
        * Overrides `PropertiesChanged` method and adds a call to
        * `finalize` which lazily configures the element's property accessors.
        * @override
        * @return {void}
-       */value:function _initializeProperties(){Polymer.telemetry.instanceCount++;this.constructor.finalize();babelHelpers.get(babelHelpers.getPrototypeOf(PropertiesMixin.prototype),"_initializeProperties",this).call(this)}/**
+       */function _initializeProperties(){Polymer.telemetry.instanceCount++;this.constructor.finalize();babelHelpers.get(babelHelpers.getPrototypeOf(PropertiesMixin.prototype),"_initializeProperties",this).call(this)}/**
        * Called when the element is added to a document.
        * Calls `_enableProperties` to turn on property system from
        * `PropertiesChanged`.
@@ -2751,13 +2751,17 @@
        * Called when the element is removed from a document
        * @suppress {missingProperties} Super may or may not implement the callback
        * @return {void}
-       */},{key:"disconnectedCallback",value:function disconnectedCallback(){if(babelHelpers.get(babelHelpers.getPrototypeOf(PropertiesMixin.prototype),"disconnectedCallback",this)){babelHelpers.get(babelHelpers.getPrototypeOf(PropertiesMixin.prototype),"disconnectedCallback",this).call(this)}}}],[{key:"finalize",/**
+       */},{key:"disconnectedCallback",value:function disconnectedCallback(){if(babelHelpers.get(babelHelpers.getPrototypeOf(PropertiesMixin.prototype),"disconnectedCallback",this)){babelHelpers.get(babelHelpers.getPrototypeOf(PropertiesMixin.prototype),"disconnectedCallback",this).call(this)}}}],[{key:"observedAttributes",get:/**
+       * Implements standard custom elements getter to observes the attributes
+       * listed in `properties`.
+       * @suppress {missingProperties} Interfaces in closure do not inherit statics, but classes do
+       */function get(){var _this=this;if(!this.hasOwnProperty("__observedAttributes")){Polymer.telemetry.register(this.prototype);var props=this._properties;this.__observedAttributes=props?Object.keys(props).map(function(p){return _this.attributeNameForProperty(p)}):[]}return this.__observedAttributes}/**
        * Finalizes an element definition, including ensuring any super classes
        * are also finalized. This includes ensuring property
        * accessors exist on the element prototype. This method calls
        * `_finalizeClass` to finalize each constructor in the prototype chain.
        * @return {void}
-       */value:function finalize(){if(!this.hasOwnProperty(JSCompiler_renameProperty("__finalized",this))){var superCtor=superPropertiesClass(/** @type {PropertiesMixinConstructor} */this);if(superCtor){superCtor.finalize()}this.__finalized=!0;this._finalizeClass()}}/**
+       */},{key:"finalize",value:function finalize(){if(!this.hasOwnProperty(JSCompiler_renameProperty("__finalized",this))){var superCtor=superPropertiesClass(/** @type {PropertiesMixinConstructor} */this);if(superCtor){superCtor.finalize()}this.__finalized=!0;this._finalizeClass()}}/**
        * Finalize an element class. This includes ensuring property
        * accessors exist on the element prototype. This method is called by
        * `finalize` and finalizes the class constructor.
@@ -2770,18 +2774,14 @@
        *
        * @return {Object} Object containing properties for this class
        * @protected
-       */},{key:"typeForProperty",/**
+       */},{key:"_properties",get:function get(){if(!this.hasOwnProperty(JSCompiler_renameProperty("__properties",this))){var superCtor=superPropertiesClass(/** @type {PropertiesMixinConstructor} */this);this.__properties=Object.assign({},superCtor&&superCtor._properties,ownProperties(/** @type {PropertiesMixinConstructor} */this))}return this.__properties}/**
        * Overrides `PropertiesChanged` method to return type specified in the
        * static `properties` object for the given property.
        * @param {string} name Name of property
        * @return {*} Type to which to deserialize attribute
        *
        * @protected
-       */value:function typeForProperty(name){var info=this._properties[name];return info&&info.type}},{key:"observedAttributes",/**
-       * Implements standard custom elements getter to observes the attributes
-       * listed in `properties`.
-       * @suppress {missingProperties} Interfaces in closure do not inherit statics, but classes do
-       */get:function get(){var _this=this;if(!this.hasOwnProperty("__observedAttributes")){Polymer.telemetry.register(this.prototype);var props=this._properties;this.__observedAttributes=props?Object.keys(props).map(function(p){return _this.attributeNameForProperty(p)}):[]}return this.__observedAttributes}},{key:"_properties",get:function get(){if(!this.hasOwnProperty(JSCompiler_renameProperty("__properties",this))){var superCtor=superPropertiesClass(/** @type {PropertiesMixinConstructor} */this);this.__properties=Object.assign({},superCtor&&superCtor._properties,ownProperties(/** @type {PropertiesMixinConstructor} */this))}return this.__properties}}]);return PropertiesMixin}(base);return PropertiesMixin})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var builtCSS=window.ShadyCSS&&window.ShadyCSS.cssBuild;/**
+       */},{key:"typeForProperty",value:function typeForProperty(name){var info=this._properties[name];return info&&info.type}}]);return PropertiesMixin}(base);return PropertiesMixin})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var builtCSS=window.ShadyCSS&&window.ShadyCSS.cssBuild;/**
    * Element class mixin that provides the core API for Polymer's meta-programming
    * features including template stamping, data-binding, attribute deserialization,
    * and property change observation.
@@ -2964,107 +2964,7 @@
      * @mixinClass
      * @unrestricted
      * @implements {Polymer_ElementMixin}
-     */var PolymerElement=/*#__PURE__*/function(_polymerElementBase){babelHelpers.inherits(PolymerElement,_polymerElementBase);var _super=_createSuper(PolymerElement);babelHelpers.createClass(PolymerElement,null,[{key:"_finalizeClass",/**
-       * Override of PropertiesMixin _finalizeClass to create observers and
-       * find the template.
-       * @return {void}
-       * @protected
-       * @override
-       * @suppress {missingProperties} Interfaces in closure do not inherit statics, but classes do
-       */value:function _finalizeClass(){babelHelpers.get(babelHelpers.getPrototypeOf(PolymerElement),"_finalizeClass",this).call(this);var observers=ownObservers(this);if(observers){this.createObservers(observers,this._properties)}this._prepareTemplate()}},{key:"_prepareTemplate",value:function _prepareTemplate(){// note: create "working" template that is finalized at instance time
-var template=/** @type {PolymerElementConstructor} */this.template;if(template){if("string"===typeof template){var t=document.createElement("template");t.innerHTML=template;template=t}else if(!Polymer.legacyOptimizations){template=template.cloneNode(!0)}}this.prototype._template=template}/**
-       * Override of PropertiesChanged createProperties to create accessors
-       * and property effects for all of the properties.
-       * @return {void}
-       * @protected
-       * @override
-       */},{key:"createProperties",value:function createProperties(props){for(var p in props){createPropertyFromConfig(this.prototype,p,props[p],props)}}/**
-       * Creates observers for the given `observers` array.
-       * Leverages `PropertyEffects` to create observers.
-       * @param {Object} observers Array of observer descriptors for
-       *   this class
-       * @param {Object} dynamicFns Object containing keys for any properties
-       *   that are functions and should trigger the effect when the function
-       *   reference is changed
-       * @return {void}
-       * @protected
-       */},{key:"createObservers",value:function createObservers(observers,dynamicFns){for(var proto=this.prototype,i=0;i<observers.length;i++){proto._createMethodObserver(observers[i],dynamicFns)}}/**
-       * Returns the template that will be stamped into this element's shadow root.
-       *
-       * If a `static get is()` getter is defined, the default implementation
-       * will return the first `<template>` in a `dom-module` whose `id`
-       * matches this element's `is`.
-       *
-       * Users may override this getter to return an arbitrary template
-       * (in which case the `is` getter is unnecessary). The template returned
-       * may be either an `HTMLTemplateElement` or a string that will be
-       * automatically parsed into a template.
-       *
-       * Note that when subclassing, if the super class overrode the default
-       * implementation and the subclass would like to provide an alternate
-       * template via a `dom-module`, it should override this getter and
-       * return `Polymer.DomModule.import(this.is, 'template')`.
-       *
-       * If a subclass would like to modify the super class template, it should
-       * clone it rather than modify it in place.  If the getter does expensive
-       * work such as cloning/modifying a template, it should memoize the
-       * template for maximum performance:
-       *
-       *   let memoizedTemplate;
-       *   class MySubClass extends MySuperClass {
-       *     static get template() {
-       *       if (!memoizedTemplate) {
-       *         memoizedTemplate = MySuperClass.template.cloneNode(true);
-       *         let subContent = document.createElement('div');
-       *         subContent.textContent = 'This came from MySubClass';
-       *         memoizedTemplate.content.appendChild(subContent);
-       *       }
-       *       return memoizedTemplate;
-       *     }
-       *   }
-       *
-       * @return {HTMLTemplateElement|string} Template to be stamped
-       */},{key:"template",get:function get(){// Explanation of template-related properties:
-// - constructor.template (this getter): the template for the class.
-//     This can come from the prototype (for legacy elements), from a
-//     dom-module, or from the super class's template (or can be overridden
-//     altogether by the user)
-// - constructor._template: memoized version of constructor.template
-// - prototype._template: working template for the element, which will be
-//     parsed and modified in place. It is a cloned version of
-//     constructor.template, saved in _finalizeClass(). Note that before
-//     this getter is called, for legacy elements this could be from a
-//     _template field on the info object passed to Polymer(), a behavior,
-//     or set in registered(); once the static getter runs, a clone of it
-//     will overwrite it on the prototype as the working template.
-if(!this.hasOwnProperty(JSCompiler_renameProperty("_template",this))){this._template=// If user has put template on prototype (e.g. in legacy via registered
-// callback or info object), prefer that first
-this.prototype.hasOwnProperty(JSCompiler_renameProperty("_template",this.prototype))?this.prototype._template:// Look in dom-module associated with this element's is
-getTemplateFromDomModule(/** @type {PolymerElementConstructor}*/this.is)||// Next look for superclass template (call the super impl this
-// way so that `this` points to the superclass)
-Object.getPrototypeOf(/** @type {PolymerElementConstructor}*/this.prototype).constructor.template}return this._template}/**
-       * Set the template.
-       *
-       * @param {HTMLTemplateElement|string} value Template to set.
-       */,set:function set(value){this._template=value}/**
-       * Path matching the url from which the element was imported.
-       *
-       * This path is used to resolve url's in template style cssText.
-       * The `importPath` property is also set on element instances and can be
-       * used to create bindings relative to the import path.
-       *
-       * For elements defined in ES modules, users should implement
-       * `static get importMeta() { return import.meta; }`, and the default
-       * implementation of `importPath` will  return `import.meta.url`'s path.
-       * For elements defined in HTML imports, this getter will return the path
-       * to the document containing a `dom-module` element matching this
-       * element's static `is` property.
-       *
-       * Note, this path should contain a trailing `/`.
-       *
-       * @return {string} The import path for this element class
-       * @suppress {missingProperties}
-       */},{key:"importPath",get:function get(){if(!this.hasOwnProperty(JSCompiler_renameProperty("_importPath",this))){var meta=this.importMeta;if(meta){this._importPath=Polymer.ResolveUrl.pathFromUrl(meta.url)}else{var module=Polymer.DomModule&&Polymer.DomModule.import(/** @type {PolymerElementConstructor} */this.is);this._importPath=module&&module.assetpath||Object.getPrototypeOf(/** @type {PolymerElementConstructor}*/this.prototype).constructor.importPath}}return this._importPath}}]);function PolymerElement(){var _this;babelHelpers.classCallCheck(this,PolymerElement);_this=_super.call(this);/** @type {HTMLTemplateElement} */_this._template;/** @type {string} */_this._importPath;/** @type {string} */_this.rootPath;/** @type {string} */_this.importPath;/** @type {StampedTemplate | HTMLElement | ShadowRoot} */_this.root;/** @type {!Object<string, !Element>} */_this.$;return _this}/**
+     */var PolymerElement=/*#__PURE__*/function(_polymerElementBase){babelHelpers.inherits(PolymerElement,_polymerElementBase);var _super=_createSuper(PolymerElement);function PolymerElement(){var _this;babelHelpers.classCallCheck(this,PolymerElement);_this=_super.call(this);/** @type {HTMLTemplateElement} */_this._template;/** @type {string} */_this._importPath;/** @type {string} */_this.rootPath;/** @type {string} */_this.importPath;/** @type {StampedTemplate | HTMLElement | ShadowRoot} */_this.root;/** @type {!Object<string, !Element>} */_this.$;return _this}/**
        * Overrides the default `Polymer.PropertyAccessors` to ensure class
        * metaprogramming related to property accessors and effects has
        * completed (calls `finalize`).
@@ -3091,7 +2991,7 @@
        * @param {string} baseURI Base URI to rebase CSS paths against
        * @return {string} The processed CSS text
        * @protected
-       */},{key:"connectedCallback",/**
+       */},{key:"connectedCallback",value:/**
        * Provides a default implementation of the standard Custom Elements
        * `connectedCallback`.
        *
@@ -3101,7 +3001,7 @@
        *
        * @suppress {missingProperties, invalidCasts} Super may or may not implement the callback
        * @return {void}
-       */value:function connectedCallback(){if(window.ShadyCSS&&this._template){window.ShadyCSS.styleElement(/** @type {!HTMLElement} */this)}babelHelpers.get(babelHelpers.getPrototypeOf(PolymerElement.prototype),"connectedCallback",this).call(this)}/**
+       */function connectedCallback(){if(window.ShadyCSS&&this._template){window.ShadyCSS.styleElement(/** @type {!HTMLElement} */this)}babelHelpers.get(babelHelpers.getPrototypeOf(PolymerElement.prototype),"connectedCallback",this).call(this)}/**
        * Stamps the element template.
        *
        * @return {void}
@@ -3172,7 +3072,107 @@
        *
        * @override
        * @suppress {missingProperties} Interfaces in closure do not inherit statics, but classes do
-       */}],[{key:"_processStyleText",value:function _processStyleText(cssText,baseURI){return Polymer.ResolveUrl.resolveCss(cssText,baseURI)}/**
+       */}],[{key:"_finalizeClass",value:/**
+       * Override of PropertiesMixin _finalizeClass to create observers and
+       * find the template.
+       * @return {void}
+       * @protected
+       * @override
+       * @suppress {missingProperties} Interfaces in closure do not inherit statics, but classes do
+       */function _finalizeClass(){babelHelpers.get(babelHelpers.getPrototypeOf(PolymerElement),"_finalizeClass",this).call(this);var observers=ownObservers(this);if(observers){this.createObservers(observers,this._properties)}this._prepareTemplate()}},{key:"_prepareTemplate",value:function _prepareTemplate(){// note: create "working" template that is finalized at instance time
+var template=/** @type {PolymerElementConstructor} */this.template;if(template){if("string"===typeof template){var t=document.createElement("template");t.innerHTML=template;template=t}else if(!Polymer.legacyOptimizations){template=template.cloneNode(!0)}}this.prototype._template=template}/**
+       * Override of PropertiesChanged createProperties to create accessors
+       * and property effects for all of the properties.
+       * @return {void}
+       * @protected
+       * @override
+       */},{key:"createProperties",value:function createProperties(props){for(var p in props){createPropertyFromConfig(this.prototype,p,props[p],props)}}/**
+       * Creates observers for the given `observers` array.
+       * Leverages `PropertyEffects` to create observers.
+       * @param {Object} observers Array of observer descriptors for
+       *   this class
+       * @param {Object} dynamicFns Object containing keys for any properties
+       *   that are functions and should trigger the effect when the function
+       *   reference is changed
+       * @return {void}
+       * @protected
+       */},{key:"createObservers",value:function createObservers(observers,dynamicFns){for(var proto=this.prototype,i=0;i<observers.length;i++){proto._createMethodObserver(observers[i],dynamicFns)}}/**
+       * Returns the template that will be stamped into this element's shadow root.
+       *
+       * If a `static get is()` getter is defined, the default implementation
+       * will return the first `<template>` in a `dom-module` whose `id`
+       * matches this element's `is`.
+       *
+       * Users may override this getter to return an arbitrary template
+       * (in which case the `is` getter is unnecessary). The template returned
+       * may be either an `HTMLTemplateElement` or a string that will be
+       * automatically parsed into a template.
+       *
+       * Note that when subclassing, if the super class overrode the default
+       * implementation and the subclass would like to provide an alternate
+       * template via a `dom-module`, it should override this getter and
+       * return `Polymer.DomModule.import(this.is, 'template')`.
+       *
+       * If a subclass would like to modify the super class template, it should
+       * clone it rather than modify it in place.  If the getter does expensive
+       * work such as cloning/modifying a template, it should memoize the
+       * template for maximum performance:
+       *
+       *   let memoizedTemplate;
+       *   class MySubClass extends MySuperClass {
+       *     static get template() {
+       *       if (!memoizedTemplate) {
+       *         memoizedTemplate = MySuperClass.template.cloneNode(true);
+       *         let subContent = document.createElement('div');
+       *         subContent.textContent = 'This came from MySubClass';
+       *         memoizedTemplate.content.appendChild(subContent);
+       *       }
+       *       return memoizedTemplate;
+       *     }
+       *   }
+       *
+       * @return {HTMLTemplateElement|string} Template to be stamped
+       */},{key:"template",get:function get(){// Explanation of template-related properties:
+// - constructor.template (this getter): the template for the class.
+//     This can come from the prototype (for legacy elements), from a
+//     dom-module, or from the super class's template (or can be overridden
+//     altogether by the user)
+// - constructor._template: memoized version of constructor.template
+// - prototype._template: working template for the element, which will be
+//     parsed and modified in place. It is a cloned version of
+//     constructor.template, saved in _finalizeClass(). Note that before
+//     this getter is called, for legacy elements this could be from a
+//     _template field on the info object passed to Polymer(), a behavior,
+//     or set in registered(); once the static getter runs, a clone of it
+//     will overwrite it on the prototype as the working template.
+if(!this.hasOwnProperty(JSCompiler_renameProperty("_template",this))){this._template=// If user has put template on prototype (e.g. in legacy via registered
+// callback or info object), prefer that first
+this.prototype.hasOwnProperty(JSCompiler_renameProperty("_template",this.prototype))?this.prototype._template:// Look in dom-module associated with this element's is
+getTemplateFromDomModule(/** @type {PolymerElementConstructor}*/this.is)||// Next look for superclass template (call the super impl this
+// way so that `this` points to the superclass)
+Object.getPrototypeOf(/** @type {PolymerElementConstructor}*/this.prototype).constructor.template}return this._template}/**
+       * Set the template.
+       *
+       * @param {HTMLTemplateElement|string} value Template to set.
+       */,set:function set(value){this._template=value}/**
+       * Path matching the url from which the element was imported.
+       *
+       * This path is used to resolve url's in template style cssText.
+       * The `importPath` property is also set on element instances and can be
+       * used to create bindings relative to the import path.
+       *
+       * For elements defined in ES modules, users should implement
+       * `static get importMeta() { return import.meta; }`, and the default
+       * implementation of `importPath` will  return `import.meta.url`'s path.
+       * For elements defined in HTML imports, this getter will return the path
+       * to the document containing a `dom-module` element matching this
+       * element's static `is` property.
+       *
+       * Note, this path should contain a trailing `/`.
+       *
+       * @return {string} The import path for this element class
+       * @suppress {missingProperties}
+       */},{key:"importPath",get:function get(){if(!this.hasOwnProperty(JSCompiler_renameProperty("_importPath",this))){var meta=this.importMeta;if(meta){this._importPath=Polymer.ResolveUrl.pathFromUrl(meta.url)}else{var module=Polymer.DomModule&&Polymer.DomModule.import(/** @type {PolymerElementConstructor} */this.is);this._importPath=module&&module.assetpath||Object.getPrototypeOf(/** @type {PolymerElementConstructor}*/this.prototype).constructor.importPath}}return this._importPath}},{key:"_processStyleText",value:function _processStyleText(cssText,baseURI){return Polymer.ResolveUrl.resolveCss(cssText,baseURI)}/**
       * Configures an element `proto` to function with a given `template`.
       * The element name `is` and extends `ext` must be specified for ShadyCSS
       * style scoping.
@@ -3197,7 +3197,7 @@
    * @param {Object=} props Bag of custom property key/values to
    *   apply to the document.
    * @return {void}
-   */Polymer.updateStyles=function(props){if(window.ShadyCSS){window.ShadyCSS.styleDocument(props)}}})();</script><script>(function(){'use strict';/**
+   */Polymer.updateStyles=function(props){if(window.ShadyCSS){window.ShadyCSS.styleDocument(props)}}})();</script><script>(function(){"use strict";/**
    * @summary Collapse multiple callbacks into one invocation after a timer.
    * @memberof Polymer
    */var Debouncer=/*#__PURE__*/function(){function Debouncer(){babelHelpers.classCallCheck(this,Debouncer);this._asyncModule=null;this._callback=null;this._timer=null}/**
@@ -3267,7 +3267,7 @@
    * @return {void}
    */Polymer.enqueueDebouncer=function(debouncer){debouncerQueue.add(debouncer)};Polymer.flushDebouncers=function(){var didFlush=!!debouncerQueue.size;// If new debouncers are added while flushing, Set.forEach will ensure
 // newly added ones are also flushed
-debouncerQueue.forEach(function(debouncer){try{debouncer.flush()}catch(e){setTimeout(function(){throw e})}});return didFlush}})();</script><script>(function(){'use strict';// detect native touch action support
+debouncerQueue.forEach(function(debouncer){try{debouncer.flush()}catch(e){setTimeout(function(){throw e})}});return didFlush}})();</script><script>(function(){"use strict";// detect native touch action support
 var HAS_NATIVE_TA="string"===typeof document.head.style.touchAction,GESTURE_KEY="__polymerGestures",HANDLED_OBJ="__polymerGesturesHandled",TOUCH_ACTION="__polymerGesturesTouchAction",TAP_DISTANCE=25,TRACK_DISTANCE=5,TRACK_LENGTH=2,MOUSE_TIMEOUT=2500,MOUSE_EVENTS=["mousedown","mousemove","mouseup","click"],MOUSE_WHICH_TO_BUTTONS=[0,1,4,2],MOUSE_HAS_BUTTONS=function(){try{return 1===new MouseEvent("test",{buttons:1}).buttons}catch(e){return!1}}();/**
    * @param {string} name Possible mouse event name
    * @return {boolean} true if mouse event, false if not
@@ -3557,7 +3557,7 @@
      * @return {void}
      */forward:function forward(e,preventer){var dx=Math.abs(e.clientX-this.info.x),dy=Math.abs(e.clientY-this.info.y),t=Gestures._findOriginalTarget(/** @type {Event} */preventer||e);if(!t||canBeDisabled[/** @type {!HTMLElement} */t.localName]&&t.hasAttribute("disabled")){return}// dx,dy can be NaN if `click` has been simulated and there was no `down` for `start`
 if(isNaN(dx)||isNaN(dy)||dx<=TAP_DISTANCE&&dy<=TAP_DISTANCE||isSyntheticClick(e)){// prevent taps from being generated if an event has canceled them
-if(!this.info.prevent){Gestures._fire(t,"tap",{x:e.clientX,y:e.clientY,sourceEvent:e,preventer:preventer})}}}});/* eslint-enable valid-jsdoc */ /** @deprecated */Gestures.findOriginalTarget=Gestures._findOriginalTarget;/** @deprecated */Gestures.add=Gestures.addListener;/** @deprecated */Gestures.remove=Gestures.removeListener;Polymer.Gestures=Gestures})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';/**
+if(!this.info.prevent){Gestures._fire(t,"tap",{x:e.clientX,y:e.clientY,sourceEvent:e,preventer:preventer})}}}});/* eslint-enable valid-jsdoc */ /** @deprecated */Gestures.findOriginalTarget=Gestures._findOriginalTarget;/** @deprecated */Gestures.add=Gestures.addListener;/** @deprecated */Gestures.remove=Gestures.removeListener;Polymer.Gestures=Gestures})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";/**
    * @const {Polymer.Gestures}
    */var gestures=Polymer.Gestures;/**
    * Element class mixin that provides API for adding Polymer's cross-platform
@@ -3577,21 +3577,21 @@
      * @polymer
      * @mixinClass
      * @implements {Polymer_GestureEventListeners}
-     */var GestureEventListeners=/*#__PURE__*/function(_superClass){babelHelpers.inherits(GestureEventListeners,_superClass);var _super=_createSuper(GestureEventListeners);function GestureEventListeners(){babelHelpers.classCallCheck(this,GestureEventListeners);return _super.apply(this,arguments)}babelHelpers.createClass(GestureEventListeners,[{key:"_addEventListenerToNode",/**
+     */var GestureEventListeners=/*#__PURE__*/function(_superClass){babelHelpers.inherits(GestureEventListeners,_superClass);var _super=_createSuper(GestureEventListeners);function GestureEventListeners(){babelHelpers.classCallCheck(this,GestureEventListeners);return _super.apply(this,arguments)}babelHelpers.createClass(GestureEventListeners,[{key:"_addEventListenerToNode",value:/**
        * Add the event listener to the node if it is a gestures event.
        *
        * @param {!Node} node Node to add event listener to
        * @param {string} eventName Name of event
        * @param {function(!Event):void} handler Listener function to add
        * @return {void}
-       */value:function _addEventListenerToNode(node,eventName,handler){if(!gestures.addListener(node,eventName,handler)){babelHelpers.get(babelHelpers.getPrototypeOf(GestureEventListeners.prototype),"_addEventListenerToNode",this).call(this,node,eventName,handler)}}/**
+       */function _addEventListenerToNode(node,eventName,handler){if(!gestures.addListener(node,eventName,handler)){babelHelpers.get(babelHelpers.getPrototypeOf(GestureEventListeners.prototype),"_addEventListenerToNode",this).call(this,node,eventName,handler)}}/**
        * Remove the event listener to the node if it is a gestures event.
        *
        * @param {!Node} node Node to remove event listener from
        * @param {string} eventName Name of event
        * @param {function(!Event):void} handler Listener function to remove
        * @return {void}
-       */},{key:"_removeEventListenerFromNode",value:function _removeEventListenerFromNode(node,eventName,handler){if(!gestures.removeListener(node,eventName,handler)){babelHelpers.get(babelHelpers.getPrototypeOf(GestureEventListeners.prototype),"_removeEventListenerFromNode",this).call(this,node,eventName,handler)}}}]);return GestureEventListeners}(superClass);return GestureEventListeners})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var HOST_DIR=/:host\(:dir\((ltr|rtl)\)\)/g,HOST_DIR_REPLACMENT=":host([dir=\"$1\"])",EL_DIR=/([\s\w-#\.\[\]\*]*):dir\((ltr|rtl)\)/g,EL_DIR_REPLACMENT=":host([dir=\"$2\"]) $1",DIR_CHECK=/:dir\((?:ltr|rtl)\)/,SHIM_SHADOW=!!(window.ShadyDOM&&window.ShadyDOM.inUse),DIR_INSTANCES=[],observer=null,DOCUMENT_DIR="";function getRTL(){DOCUMENT_DIR=document.documentElement.getAttribute("dir")}/**
+       */},{key:"_removeEventListenerFromNode",value:function _removeEventListenerFromNode(node,eventName,handler){if(!gestures.removeListener(node,eventName,handler)){babelHelpers.get(babelHelpers.getPrototypeOf(GestureEventListeners.prototype),"_removeEventListenerFromNode",this).call(this,node,eventName,handler)}}}]);return GestureEventListeners}(superClass);return GestureEventListeners})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var HOST_DIR=/:host\(:dir\((ltr|rtl)\)\)/g,HOST_DIR_REPLACMENT=":host([dir=\"$1\"])",EL_DIR=/([\s\w-#\.\[\]\*]*):dir\((ltr|rtl)\)/g,EL_DIR_REPLACMENT=":host([dir=\"$2\"]) $1",DIR_CHECK=/:dir\((?:ltr|rtl)\)/,SHIM_SHADOW=!!(window.ShadyDOM&&window.ShadyDOM.inUse),DIR_INSTANCES=[],observer=null,DOCUMENT_DIR="";function getRTL(){DOCUMENT_DIR=document.documentElement.getAttribute("dir")}/**
      * @param {!Polymer_DirMixin} instance Instance to set RTL status on
      */function setRTL(instance){if(!instance.__autoDirOptOut){var el=/** @type {!HTMLElement} */instance;el.setAttribute("dir",DOCUMENT_DIR)}}function updateDirection(){getRTL();DOCUMENT_DIR=document.documentElement.getAttribute("dir");for(var i=0;i<DIR_INSTANCES.length;i++){setRTL(DIR_INSTANCES[i])}}function takeRecords(){if(observer&&observer.takeRecords().length){updateDirection()}}/**
      * Element class mixin that allows elements to use the `:dir` CSS Selector to have
@@ -3618,15 +3618,7 @@
        * @extends {base}
        * @implements {Polymer_PropertyAccessors}
        * @private
-       */var elementBase=Polymer.PropertyAccessors(base),Dir=/*#__PURE__*/function(_elementBase){babelHelpers.inherits(Dir,_elementBase);var _super=_createSuper(Dir);babelHelpers.createClass(Dir,null,[{key:"_processStyleText",/**
-         * @override
-         * @suppress {missingProperties} Interfaces in closure do not inherit statics, but classes do
-         */value:function _processStyleText(cssText,baseURI){cssText=babelHelpers.get(babelHelpers.getPrototypeOf(Dir),"_processStyleText",this).call(this,cssText,baseURI);if(!SHIM_SHADOW&&DIR_CHECK.test(cssText)){cssText=this._replaceDirInCssText(cssText);this.__activateDir=!0}return cssText}/**
-         * Replace `:dir` in the given CSS text
-         *
-         * @param {string} text CSS text to replace DIR
-         * @return {string} Modified CSS
-         */},{key:"_replaceDirInCssText",value:function _replaceDirInCssText(text){var replacedText=text;replacedText=replacedText.replace(HOST_DIR,HOST_DIR_REPLACMENT);replacedText=replacedText.replace(EL_DIR,EL_DIR_REPLACMENT);return replacedText}}]);function Dir(){var _this;babelHelpers.classCallCheck(this,Dir);_this=_super.call(this);/** @type {boolean} */_this.__autoDirOptOut=!1;return _this}/**
+       */var elementBase=Polymer.PropertyAccessors(base),Dir=/*#__PURE__*/function(_elementBase){babelHelpers.inherits(Dir,_elementBase);var _super=_createSuper(Dir);function Dir(){var _this;babelHelpers.classCallCheck(this,Dir);_this=_super.call(this);/** @type {boolean} */_this.__autoDirOptOut=!1;return _this}/**
          * @suppress {invalidCasts} Closure doesn't understand that `this` is an HTMLElement
          * @return {void}
          */babelHelpers.createClass(Dir,[{key:"ready",value:function ready(){babelHelpers.get(babelHelpers.getPrototypeOf(Dir.prototype),"ready",this).call(this);this.__autoDirOptOut=/** @type {!HTMLElement} */this.hasAttribute("dir")}/**
@@ -3635,11 +3627,19 @@
          */},{key:"connectedCallback",value:function connectedCallback(){if(elementBase.prototype.connectedCallback){babelHelpers.get(babelHelpers.getPrototypeOf(Dir.prototype),"connectedCallback",this).call(this)}if(this.constructor.__activateDir){takeRecords();DIR_INSTANCES.push(this);setRTL(this)}}/**
          * @suppress {missingProperties} If it exists on elementBase, it can be super'd
          * @return {void}
-         */},{key:"disconnectedCallback",value:function disconnectedCallback(){if(elementBase.prototype.disconnectedCallback){babelHelpers.get(babelHelpers.getPrototypeOf(Dir.prototype),"disconnectedCallback",this).call(this)}if(this.constructor.__activateDir){var idx=DIR_INSTANCES.indexOf(this);if(-1<idx){DIR_INSTANCES.splice(idx,1)}}}}]);return Dir}(elementBase);/**
+         */},{key:"disconnectedCallback",value:function disconnectedCallback(){if(elementBase.prototype.disconnectedCallback){babelHelpers.get(babelHelpers.getPrototypeOf(Dir.prototype),"disconnectedCallback",this).call(this)}if(this.constructor.__activateDir){var idx=DIR_INSTANCES.indexOf(this);if(-1<idx){DIR_INSTANCES.splice(idx,1)}}}}],[{key:"_processStyleText",value:/**
+         * @override
+         * @suppress {missingProperties} Interfaces in closure do not inherit statics, but classes do
+         */function _processStyleText(cssText,baseURI){cssText=babelHelpers.get(babelHelpers.getPrototypeOf(Dir),"_processStyleText",this).call(this,cssText,baseURI);if(!SHIM_SHADOW&&DIR_CHECK.test(cssText)){cssText=this._replaceDirInCssText(cssText);this.__activateDir=!0}return cssText}/**
+         * Replace `:dir` in the given CSS text
+         *
+         * @param {string} text CSS text to replace DIR
+         * @return {string} Modified CSS
+         */},{key:"_replaceDirInCssText",value:function _replaceDirInCssText(text){var replacedText=text;replacedText=replacedText.replace(HOST_DIR,HOST_DIR_REPLACMENT);replacedText=replacedText.replace(EL_DIR,EL_DIR_REPLACMENT);return replacedText}}]);return Dir}(elementBase);/**
        * @polymer
        * @mixinClass
        * @implements {Polymer_DirMixin}
-       */Dir.__activateDir=!1;return Dir})})();</script><script>(function(){'use strict';// run a callback when HTMLImports are ready or immediately if
+       */Dir.__activateDir=!1;return Dir})})();</script><script>(function(){"use strict";// run a callback when HTMLImports are ready or immediately if
 // this api is not available.
 function whenImportsReady(cb){if(window.HTMLImports){HTMLImports.whenReady(cb)}else{cb()}}/**
    * Convenience method for importing an HTML document imperatively.
@@ -3671,7 +3671,7 @@
 // called.
 if(link.parentNode){link.parentNode.removeChild(link)}if(onerror){whenImportsReady(function(){onerror(event)})}};link.addEventListener("load",loadListener);link.addEventListener("error",errorListener);if(null==link.parentNode){document.head.appendChild(link);// if the link already loaded, dispatch a fake load event
 // so that listeners are called and get a proper event argument.
-}else if(link.__dynamicImportLoaded){link.dispatchEvent(new Event("load"))}return link}})();</script><script>(function(){'use strict';var scheduled=!1,beforeRenderQueue=[],afterRenderQueue=[];function schedule(){scheduled=!0;// before next render
+}else if(link.__dynamicImportLoaded){link.dispatchEvent(new Event("load"))}return link}})();</script><script>(function(){"use strict";var scheduled=!1,beforeRenderQueue=[],afterRenderQueue=[];function schedule(){scheduled=!0;// before next render
 requestAnimationFrame(function(){scheduled=!1;flushQueue(beforeRenderQueue);// after the render
 setTimeout(function(){runQueue(afterRenderQueue)})})}function flushQueue(queue){while(queue.length){callMethod(queue.shift())}}function runQueue(queue){for(var i=0,l=queue.length;i<l;i++){callMethod(queue.shift())}}function callMethod(info){var context=info[0],callback=info[1],args=info[2];try{callback.apply(context,args)}catch(e){setTimeout(function(){throw e})}}function flush(){while(beforeRenderQueue.length||afterRenderQueue.length){flushQueue(beforeRenderQueue);flushQueue(afterRenderQueue)}scheduled=!1}/**
    * Module for scheduling flushable pre-render and post-render tasks.
@@ -3714,8 +3714,8 @@
      *
      * @memberof Polymer.RenderStatus
      * @return {void}
-     */flush:flush}})();</script><script>(function(){'use strict';// unresolved
-function resolve(){document.body.removeAttribute("unresolved")}if(window.WebComponents){window.addEventListener("WebComponentsReady",resolve)}else{if("interactive"===document.readyState||"complete"===document.readyState){resolve()}else{window.addEventListener("DOMContentLoaded",resolve)}}})();</script><script>(function(){'use strict';function newSplice(index,removed,addedCount){return{index:index,removed:removed,addedCount:addedCount}}var EDIT_LEAVE=0,EDIT_UPDATE=1,EDIT_ADD=2,EDIT_DELETE=3;// Note: This function is *based* on the computation of the Levenshtein
+     */flush:flush}})();</script><script>(function(){"use strict";// unresolved
+function resolve(){document.body.removeAttribute("unresolved")}if(window.WebComponents){window.addEventListener("WebComponentsReady",resolve)}else{if("interactive"===document.readyState||"complete"===document.readyState){resolve()}else{window.addEventListener("DOMContentLoaded",resolve)}}})();</script><script>(function(){"use strict";function newSplice(index,removed,addedCount){return{index:index,removed:removed,addedCount:addedCount}}var EDIT_LEAVE=0,EDIT_UPDATE=1,EDIT_ADD=2,EDIT_DELETE=3;// Note: This function is *based* on the computation of the Levenshtein
 // "edit" distance. The one change is that "updates" are treated as two
 // edits - not one. With Array splices, an update is really a delete
 // followed by an add. By retaining this, we optimize for "keeping" the
@@ -3729,7 +3729,7 @@
 function calcEditDistances(current,currentStart,currentEnd,old,oldStart,oldEnd){// "Deletion" columns
 // "Addition" rows. Initialize null column.
 for(var rowCount=oldEnd-oldStart+1,columnCount=currentEnd-currentStart+1,distances=Array(rowCount),i=0;i<rowCount;i++){distances[i]=Array(columnCount);distances[i][0]=i}// Initialize null row
-for(var j=0;j<columnCount;j++){distances[0][j]=j}for(var _i=1;_i<rowCount;_i++){for(var _j=1;_j<columnCount;_j++){if(equals(current[currentStart+_j-1],old[oldStart+_i-1]))distances[_i][_j]=distances[_i-1][_j-1];else{var north=distances[_i-1][_j]+1,west=distances[_i][_j-1]+1;distances[_i][_j]=north<west?north:west}}}return distances}// This starts at the final weight, and walks "backward" by finding
+for(var j=0;j<columnCount;j++)distances[0][j]=j;for(var _i=1;_i<rowCount;_i++){for(var _j=1;_j<columnCount;_j++){if(equals(current[currentStart+_j-1],old[oldStart+_i-1]))distances[_i][_j]=distances[_i-1][_j-1];else{var north=distances[_i-1][_j]+1,west=distances[_i][_j-1]+1;distances[_i][_j]=north<west?north:west}}}return distances}// This starts at the final weight, and walks "backward" by finding
 // the minimum previous weight recursively until the origin of the weight
 // matrix.
 function spliceOperationsFromEditDistances(distances){var i=distances.length-1,j=distances[0].length-1,current=distances[i][j],edits=[];while(0<i||0<j){if(0==i){edits.push(EDIT_ADD);j--;continue}if(0==j){edits.push(EDIT_DELETE);i--;continue}var northWest=distances[i-1][j-1],west=distances[i-1][j],north=distances[i][j-1],min=void 0;if(west<north)min=west<northWest?west:northWest;else min=north<northWest?north:northWest;if(min==northWest){if(northWest==current){edits.push(EDIT_LEAVE)}else{edits.push(EDIT_UPDATE);current=northWest}i--;j--}else if(min==west){edits.push(EDIT_DELETE);i--;current=west}else{edits.push(EDIT_ADD);j--;current=north}}edits.reverse();return edits}/**
@@ -3770,7 +3770,7 @@
    * contains: `index` the location where the splice occurred; `removed`
    * the array of removed items from this location; `addedCount` the number
    * of items added at this location.
-   */function calcSplices(current,currentStart,currentEnd,old,oldStart,oldEnd){var prefixCount=0,suffixCount=0,splice,minLength=Math.min(currentEnd-currentStart,oldEnd-oldStart);if(0==currentStart&&0==oldStart)prefixCount=sharedPrefix(current,old,minLength);if(currentEnd==current.length&&oldEnd==old.length)suffixCount=sharedSuffix(current,old,minLength-prefixCount);currentStart+=prefixCount;oldStart+=prefixCount;currentEnd-=suffixCount;oldEnd-=suffixCount;if(0==currentEnd-currentStart&&0==oldEnd-oldStart)return[];if(currentStart==currentEnd){splice=newSplice(currentStart,[],0);while(oldStart<oldEnd){splice.removed.push(old[oldStart++])}return[splice]}else if(oldStart==oldEnd)return[newSplice(currentStart,[],currentEnd-currentStart)];var ops=spliceOperationsFromEditDistances(calcEditDistances(current,currentStart,currentEnd,old,oldStart,oldEnd));splice=void 0;for(var splices=[],index=currentStart,oldIndex=oldStart,i=0;i<ops.length;i++){switch(ops[i]){case EDIT_LEAVE:if(splice){splices.push(splice);splice=void 0}index++;oldIndex++;break;case EDIT_UPDATE:if(!splice)splice=newSplice(index,[],0);splice.addedCount++;index++;splice.removed.push(old[oldIndex]);oldIndex++;break;case EDIT_ADD:if(!splice)splice=newSplice(index,[],0);splice.addedCount++;index++;break;case EDIT_DELETE:if(!splice)splice=newSplice(index,[],0);splice.removed.push(old[oldIndex]);oldIndex++;break;}}if(splice){splices.push(splice)}return splices}function sharedPrefix(current,old,searchLength){for(var i=0;i<searchLength;i++){if(!equals(current[i],old[i]))return i}return searchLength}function sharedSuffix(current,old,searchLength){var index1=current.length,index2=old.length,count=0;while(count<searchLength&&equals(current[--index1],old[--index2])){count++}return count}function calculateSplices(current,previous){return calcSplices(current,0,current.length,previous,0,previous.length)}function equals(currentValue,previousValue){return currentValue===previousValue}/**
+   */function calcSplices(current,currentStart,currentEnd,old,oldStart,oldEnd){var prefixCount=0,suffixCount=0,splice,minLength=Math.min(currentEnd-currentStart,oldEnd-oldStart);if(0==currentStart&&0==oldStart)prefixCount=sharedPrefix(current,old,minLength);if(currentEnd==current.length&&oldEnd==old.length)suffixCount=sharedSuffix(current,old,minLength-prefixCount);currentStart+=prefixCount;oldStart+=prefixCount;currentEnd-=suffixCount;oldEnd-=suffixCount;if(0==currentEnd-currentStart&&0==oldEnd-oldStart)return[];if(currentStart==currentEnd){splice=newSplice(currentStart,[],0);while(oldStart<oldEnd)splice.removed.push(old[oldStart++]);return[splice]}else if(oldStart==oldEnd)return[newSplice(currentStart,[],currentEnd-currentStart)];var ops=spliceOperationsFromEditDistances(calcEditDistances(current,currentStart,currentEnd,old,oldStart,oldEnd));splice=void 0;for(var splices=[],index=currentStart,oldIndex=oldStart,i=0;i<ops.length;i++){switch(ops[i]){case EDIT_LEAVE:if(splice){splices.push(splice);splice=void 0}index++;oldIndex++;break;case EDIT_UPDATE:if(!splice)splice=newSplice(index,[],0);splice.addedCount++;index++;splice.removed.push(old[oldIndex]);oldIndex++;break;case EDIT_ADD:if(!splice)splice=newSplice(index,[],0);splice.addedCount++;index++;break;case EDIT_DELETE:if(!splice)splice=newSplice(index,[],0);splice.removed.push(old[oldIndex]);oldIndex++;break;}}if(splice){splices.push(splice)}return splices}function sharedPrefix(current,old,searchLength){for(var i=0;i<searchLength;i++)if(!equals(current[i],old[i]))return i;return searchLength}function sharedSuffix(current,old,searchLength){var index1=current.length,index2=old.length,count=0;while(count<searchLength&&equals(current[--index1],old[--index2]))count++;return count}function calculateSplices(current,previous){return calcSplices(current,0,current.length,previous,0,previous.length)}function equals(currentValue,previousValue){return currentValue===previousValue}/**
    * @namespace
    * @memberof Polymer
    * @summary Module that provides utilities for diffing arrays.
@@ -3805,7 +3805,7 @@
      * contains: `index` the location where the splice occurred; `removed`
      * the array of removed items from this location; `addedCount` the number
      * of items added at this location.
-     */calculateSplices:calculateSplices}})();</script><script>(function(){'use strict';/**
+     */calculateSplices:calculateSplices}})();</script><script>(function(){"use strict";/**
    * Returns true if `node` is a slot element
    * @param {Node} node Node to test.
    * @return {boolean} Returns true if the given `node` is a slot
@@ -3851,24 +3851,11 @@
    * @memberof Polymer
    * @summary Class that listens for changes (additions or removals) to
    * "flattened nodes" on a given `node`.
-   */var FlattenedNodesObserver=/*#__PURE__*/function(){babelHelpers.createClass(FlattenedNodesObserver,null,[{key:"getFlattenedNodes",/**
-     * Returns the list of flattened nodes for the given `node`.
-     * This list consists of a node's children and, for any children
-     * that are `<slot>` elements, the expanded flattened list of `assignedNodes`.
-     * For example, if the observed node has children `<a></a><slot></slot><b></b>`
-     * and the `<slot>` has one `<div>` assigned to it, then the flattened
-     * nodes list is `<a></a><div></div><b></b>`. If the `<slot>` has other
-     * `<slot>` elements assigned to it, these are flattened as well.
-     *
-     * @param {HTMLElement|HTMLSlotElement} node The node for which to return the list of flattened nodes.
-     * @return {Array} The list of flattened nodes for the given `node`.
-    */value:function getFlattenedNodes(node){if(isSlot(node)){node=/** @type {HTMLSlotElement} */node;// eslint-disable-line no-self-assign
-return node.assignedNodes({flatten:!0})}else{return Array.from(node.childNodes).map(function(node){if(isSlot(node)){node=/** @type {HTMLSlotElement} */node;// eslint-disable-line no-self-assign
-return node.assignedNodes({flatten:!0})}else{return[node]}}).reduce(function(a,b){return a.concat(b)},[])}}/**
+   */var FlattenedNodesObserver=/*#__PURE__*/function(){/**
      * @param {Element} target Node on which to listen for changes.
      * @param {?function(!Element, { target: !Element, addedNodes: !Array<!Element>, removedNodes: !Array<!Element> }):void} callback Function called when there are additions
      * or removals from the target's list of flattened nodes.
-    */}]);function FlattenedNodesObserver(target,callback){var _this=this;babelHelpers.classCallCheck(this,FlattenedNodesObserver);/**
+    */function FlattenedNodesObserver(target,callback){var _this=this;babelHelpers.classCallCheck(this,FlattenedNodesObserver);/**
        * @type {MutationObserver}
        * @private
        */this._shadyChildrenObserver=null;/**
@@ -3922,14 +3909,27 @@
      * @param {!Array<Element|Node>|!NodeList<Node>} nodeList Nodes that could change
      * @return {void}
      * @private
-     */},{key:"_unlistenSlots",value:function _unlistenSlots(nodeList){for(var i=0,n;i<nodeList.length;i++){n=nodeList[i];if(isSlot(n)){n.removeEventListener("slotchange",this._boundSchedule)}}}}]);return FlattenedNodesObserver}();Polymer.FlattenedNodesObserver=FlattenedNodesObserver})();</script><script>(function(){'use strict';/**
+     */},{key:"_unlistenSlots",value:function _unlistenSlots(nodeList){for(var i=0,n;i<nodeList.length;i++){n=nodeList[i];if(isSlot(n)){n.removeEventListener("slotchange",this._boundSchedule)}}}}],[{key:"getFlattenedNodes",value:/**
+     * Returns the list of flattened nodes for the given `node`.
+     * This list consists of a node's children and, for any children
+     * that are `<slot>` elements, the expanded flattened list of `assignedNodes`.
+     * For example, if the observed node has children `<a></a><slot></slot><b></b>`
+     * and the `<slot>` has one `<div>` assigned to it, then the flattened
+     * nodes list is `<a></a><div></div><b></b>`. If the `<slot>` has other
+     * `<slot>` elements assigned to it, these are flattened as well.
+     *
+     * @param {HTMLElement|HTMLSlotElement} node The node for which to return the list of flattened nodes.
+     * @return {Array} The list of flattened nodes for the given `node`.
+    */function getFlattenedNodes(node){if(isSlot(node)){node=/** @type {HTMLSlotElement} */node;// eslint-disable-line no-self-assign
+return node.assignedNodes({flatten:!0})}else{return Array.from(node.childNodes).map(function(node){if(isSlot(node)){node=/** @type {HTMLSlotElement} */node;// eslint-disable-line no-self-assign
+return node.assignedNodes({flatten:!0})}else{return[node]}}).reduce(function(a,b){return a.concat(b)},[])}}}]);return FlattenedNodesObserver}();Polymer.FlattenedNodesObserver=FlattenedNodesObserver})();</script><script>(function(){"use strict";/**
    * Forces several classes of asynchronously queued tasks to flush:
    * - Debouncers added via `enqueueDebouncer`
    * - ShadyDOM distribution
    *
    * @memberof Polymer
    * @return {void}
-   */Polymer.flush=function(){var shadyDOM,debouncers;do{shadyDOM=window.ShadyDOM&&ShadyDOM.flush();if(window.ShadyCSS&&window.ShadyCSS.ScopingShim){window.ShadyCSS.ScopingShim.flush()}debouncers=Polymer.flushDebouncers()}while(shadyDOM||debouncers)}})();</script><script>(function(){'use strict';var p=Element.prototype,normalizedMatchesSelector=p.matches||p.matchesSelector||p.mozMatchesSelector||p.msMatchesSelector||p.oMatchesSelector||p.webkitMatchesSelector,matchesSelector=function matchesSelector(node,selector){return normalizedMatchesSelector.call(node,selector)},DomApi=/*#__PURE__*/function(){/**
+   */Polymer.flush=function(){var shadyDOM,debouncers;do{shadyDOM=window.ShadyDOM&&ShadyDOM.flush();if(window.ShadyCSS&&window.ShadyCSS.ScopingShim){window.ShadyCSS.ScopingShim.flush()}debouncers=Polymer.flushDebouncers()}while(shadyDOM||debouncers)}})();</script><script>(function(){"use strict";var p=Element.prototype,normalizedMatchesSelector=p.matches||p.matchesSelector||p.mozMatchesSelector||p.msMatchesSelector||p.oMatchesSelector||p.webkitMatchesSelector,matchesSelector=function matchesSelector(node,selector){return normalizedMatchesSelector.call(node,selector)},DomApi=/*#__PURE__*/function(){/**
      * @param {Node} node Node for which to create a Polymer.dom helper object.
      */function DomApi(node){babelHelpers.classCallCheck(this,DomApi);this.node=node}/**
      * Returns an instance of `Polymer.FlattenedNodesObserver` that
@@ -3996,7 +3996,7 @@
      * @return {Node|undefined} Currently focused element
      */},{key:"activeElement",get:function get(){var node=this.node;return node._activeElement!==void 0?node._activeElement:node.activeElement}}]);return DomApi}();/**
    * @const {function(this:Node, string): boolean}
-   */function forwardMethods(proto,methods){for(var _loop=function _loop(i){var method=methods[i];/* eslint-disable valid-jsdoc */proto[method]=/** @this {DomApi} */function(){return this.node[method].apply(this.node,arguments)};/* eslint-enable */},i=0;i<methods.length;i++){_loop(i)}}function forwardReadOnlyProperties(proto,properties){for(var _loop2=function _loop2(i){var name=properties[i];Object.defineProperty(proto,name,{get:function get(){var domApi=/** @type {DomApi} */this;return domApi.node[name]},configurable:!0})},i=0;i<properties.length;i++){_loop2(i)}}function forwardProperties(proto,properties){for(var _loop3=function _loop3(i){var name=properties[i];Object.defineProperty(proto,name,{get:function get(){var domApi=/** @type {DomApi} */this;return domApi.node[name]},set:function set(value){/** @type {DomApi} */this.node[name]=value},configurable:!0})},i=0;i<properties.length;i++){_loop3(i)}}forwardMethods(DomApi.prototype,["cloneNode","appendChild","insertBefore","removeChild","replaceChild","setAttribute","removeAttribute","querySelector","querySelectorAll"]);forwardReadOnlyProperties(DomApi.prototype,["parentNode","firstChild","lastChild","nextSibling","previousSibling","firstElementChild","lastElementChild","nextElementSibling","previousElementSibling","childNodes","children","classList"]);forwardProperties(DomApi.prototype,["textContent","innerHTML"]);/**
+   */function forwardMethods(proto,methods){for(var _loop=function _loop(){var method=methods[i];/* eslint-disable valid-jsdoc */proto[method]=/** @this {DomApi} */function(){return this.node[method].apply(this.node,arguments)};/* eslint-enable */},i=0;i<methods.length;i++){_loop()}}function forwardReadOnlyProperties(proto,properties){for(var _loop2=function _loop2(){var name=properties[i];Object.defineProperty(proto,name,{get:function get(){var domApi=/** @type {DomApi} */this;return domApi.node[name]},configurable:!0})},i=0;i<properties.length;i++){_loop2()}}function forwardProperties(proto,properties){for(var _loop3=function _loop3(){var name=properties[i];Object.defineProperty(proto,name,{get:function get(){var domApi=/** @type {DomApi} */this;return domApi.node[name]},set:function set(value){/** @type {DomApi} */this.node[name]=value},configurable:!0})},i=0;i<properties.length;i++){_loop3()}}forwardMethods(DomApi.prototype,["cloneNode","appendChild","insertBefore","removeChild","replaceChild","setAttribute","removeAttribute","querySelector","querySelectorAll"]);forwardReadOnlyProperties(DomApi.prototype,["parentNode","firstChild","lastChild","nextSibling","previousSibling","firstElementChild","lastElementChild","nextElementSibling","previousElementSibling","childNodes","children","classList"]);forwardProperties(DomApi.prototype,["textContent","innerHTML"]);/**
    * Event API wrapper class returned from `Polymer.dom.(target)` when
    * `target` is an `Event`.
    */var EventApi=/*#__PURE__*/function(){function EventApi(event){babelHelpers.classCallCheck(this,EventApi);this.event=event}/**
@@ -4079,7 +4079,7 @@
    *
    * @memberof Polymer.dom
    * @param {!Polymer.Debouncer} debouncer Debouncer to enqueue
-   */Polymer.dom.addDebouncer=Polymer.enqueueDebouncer})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var styleInterface=window.ShadyCSS;/**
+   */Polymer.dom.addDebouncer=Polymer.enqueueDebouncer})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var styleInterface=window.ShadyCSS;/**
    * Element class mixin that provides Polymer's "legacy" API intended to be
    * backward-compatible to the greatest extent possible with the API
    * found on the Polymer 1.x `Polymer.Base` prototype applied to all elements
@@ -4107,11 +4107,11 @@
        * @return {!Object} The `import.meta` object set on the prototype
        * @suppress {missingProperties} `this` is always in the instance in
        *  closure for some reason even in a static method, rather than the class
-       */babelHelpers.createClass(LegacyElement,[{key:"created",/**
+       */babelHelpers.createClass(LegacyElement,[{key:"created",value:/**
        * Legacy callback called during the `constructor`, for overriding
        * by the user.
        * @return {void}
-       */value:function created(){}/**
+       */function created(){}/**
        * Provides an implementation of `connectedCallback`
        * which adds Polymer legacy API's `attached` method.
        * @return {void}
@@ -4324,12 +4324,12 @@
        * is contained. This is a shorthand for
        * `this.getRootNode().host`.
        * @this {Element}
-       */},{key:"distributeContent",/**
+       */},{key:"domHost",get:function get(){var root=this.getRootNode();return babelHelpers.instanceof(root,DocumentFragment)?/** @type {ShadowRoot} */root.host:root}/**
        * Force this element to distribute its children to its local dom.
        * This should not be necessary as of Polymer 2.0.2 and is provided only
        * for backwards compatibility.
        * @return {void}
-       */value:function distributeContent(){if(window.ShadyDOM&&this.shadowRoot){ShadyDOM.flush()}}/**
+       */},{key:"distributeContent",value:function distributeContent(){if(window.ShadyDOM&&this.shadowRoot){ShadyDOM.flush()}}/**
        * Returns a list of nodes that are the effective childNodes. The effective
        * childNodes list is the same as the element's childNodes except that
        * any `<content>` elements are replaced with the list of nodes distributed
@@ -4580,10 +4580,10 @@
        * @param {...*} args Array of strings or objects to log
        * @return {Array} Array with formatting information for `console`
        *   logging.
-       */},{key:"_logf",value:function _logf(methodName){for(var _len4=arguments.length,args=Array(1<_len4?_len4-1:0),_key4=1;_key4<_len4;_key4++){args[_key4-1]=arguments[_key4]}return["[%s::%s]",this.is,methodName].concat(args)}},{key:"domHost",get:function get(){var root=this.getRootNode();return babelHelpers.instanceof(root,DocumentFragment)?/** @type {ShadowRoot} */root.host:root}}],[{key:"importMeta",get:function get(){return this.prototype.importMeta}}]);return LegacyElement}(legacyElementBase);/**
+       */},{key:"_logf",value:function _logf(methodName){for(var _len4=arguments.length,args=Array(1<_len4?_len4-1:0),_key4=1;_key4<_len4;_key4++){args[_key4-1]=arguments[_key4]}return["[%s::%s]",this.is,methodName].concat(args)}}],[{key:"importMeta",get:function get(){return this.prototype.importMeta}}]);return LegacyElement}(legacyElementBase);/**
      * Map of simple names to touch action names
      * @dict
-     */LegacyElement.prototype.is="";return LegacyElement})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var lifecycleProps={attached:!0,detached:!0,ready:!0,created:!0,beforeRegister:!0,registered:!0,attributeChanged:!0,listeners:!0,hostAttributes:!0},excludeOnInfo={attached:!0,detached:!0,ready:!0,created:!0,beforeRegister:!0,registered:!0,attributeChanged:!0,behaviors:!0,_noAccessors:!0},excludeOnBehaviors=Object.assign({listeners:!0,hostAttributes:!0,properties:!0,observers:!0},excludeOnInfo);function copyProperties(source,target,excludeProps){for(var noAccessors=source._noAccessors,propertyNames=Object.getOwnPropertyNames(source),i=0,p;i<propertyNames.length;i++){p=propertyNames[i];if(p in excludeProps){continue}if(noAccessors){target[p]=source[p]}else{var pd=Object.getOwnPropertyDescriptor(source,p);if(pd){// ensure property is configurable so that a later behavior can
+     */LegacyElement.prototype.is="";return LegacyElement})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var lifecycleProps={attached:!0,detached:!0,ready:!0,created:!0,beforeRegister:!0,registered:!0,attributeChanged:!0,listeners:!0,hostAttributes:!0},excludeOnInfo={attached:!0,detached:!0,ready:!0,created:!0,beforeRegister:!0,registered:!0,attributeChanged:!0,behaviors:!0,_noAccessors:!0},excludeOnBehaviors=Object.assign({listeners:!0,hostAttributes:!0,properties:!0,observers:!0},excludeOnInfo);function copyProperties(source,target,excludeProps){for(var noAccessors=source._noAccessors,propertyNames=Object.getOwnPropertyNames(source),i=0,p;i<propertyNames.length;i++){p=propertyNames[i];if(p in excludeProps){continue}if(noAccessors){target[p]=source[p]}else{var pd=Object.getOwnPropertyDescriptor(source,p);if(pd){// ensure property is configurable so that a later behavior can
 // re-configure it.
 pd.configurable=!0;Object.defineProperty(target,p,pd)}}}}/**
      * Applies a "legacy" behavior or array of behaviors to the provided class.
@@ -4663,9 +4663,9 @@
      * @suppress {checkTypes}
      * @private
      */function GenerateClassFromInfo(info,Base,behaviors){// manages behavior and lifecycle processing (filled in after class definition)
-var behaviorList,lifecycle={},PolymerGenerated=/*#__PURE__*/function(_Base){babelHelpers.inherits(PolymerGenerated,_Base);var _super=_createSuper(PolymerGenerated);function PolymerGenerated(){babelHelpers.classCallCheck(this,PolymerGenerated);return _super.apply(this,arguments)}babelHelpers.createClass(PolymerGenerated,[{key:"created",/**
+var behaviorList,lifecycle={},PolymerGenerated=/*#__PURE__*/function(_Base){babelHelpers.inherits(PolymerGenerated,_Base);var _super=_createSuper(PolymerGenerated);function PolymerGenerated(){babelHelpers.classCallCheck(this,PolymerGenerated);return _super.apply(this,arguments)}babelHelpers.createClass(PolymerGenerated,[{key:"created",value:/**
          * @return {void}
-         */value:function created(){babelHelpers.get(babelHelpers.getPrototypeOf(PolymerGenerated.prototype),"created",this).call(this);var list=lifecycle.created;if(list){for(var i=0;i<list.length;i++){list[i].call(this)}}}/**
+         */function created(){babelHelpers.get(babelHelpers.getPrototypeOf(PolymerGenerated.prototype),"created",this).call(this);var list=lifecycle.created;if(list){for(var i=0;i<list.length;i++){list[i].call(this)}}}/**
          * @return {void}
          */},{key:"_registered",value:function _registered(){/* NOTE: `beforeRegister` is called here for bc, but the behavior
             is different than in 1.x. In 1.0, the method was called *after*
@@ -4700,8 +4700,8 @@
          * @param {?string} old Old attribute value
          * @param {?string} value New attribute value
          * @return {void}
-         */},{key:"attributeChanged",value:function attributeChanged(name,old,value){babelHelpers.get(babelHelpers.getPrototypeOf(PolymerGenerated.prototype),"attributeChanged",this).call(this);var list=lifecycle.attributeChanged;if(list){for(var i=0;i<list.length;i++){list[i].call(this,name,old,value)}}}}],[{key:"_finalizeClass",// explicitly not calling super._finalizeClass
-value:function _finalizeClass(){// if calling via a subclass that hasn't been generated, pass through to super
+         */},{key:"attributeChanged",value:function attributeChanged(name,old,value){babelHelpers.get(babelHelpers.getPrototypeOf(PolymerGenerated.prototype),"attributeChanged",this).call(this);var list=lifecycle.attributeChanged;if(list){for(var i=0;i<list.length;i++){list[i].call(this,name,old,value)}}}}],[{key:"_finalizeClass",value:// explicitly not calling super._finalizeClass
+function _finalizeClass(){// if calling via a subclass that hasn't been generated, pass through to super
 if(!this.hasOwnProperty(window.JSCompiler_renameProperty("generatedFrom",this))){babelHelpers.get(babelHelpers.getPrototypeOf(PolymerGenerated),"_finalizeClass",this).call(this)}else{// interleave properties and observers per behavior and `info`
 if(behaviorList){for(var i=0,b;i<behaviorList.length;i++){b=behaviorList[i];if(b.properties){this.createProperties(b.properties)}if(b.observers){this.createObservers(b.observers,b.properties)}}}if(info.properties){this.createProperties(info.properties)}if(info.observers){this.createObservers(info.observers,info.properties)}// make sure to prepare the element template
 this._prepareTemplate()}}},{key:"properties",get:function get(){var properties={};if(behaviorList){for(var i=0;i<behaviorList.length;i++){Object.assign(properties,behaviorList[i].properties)}}Object.assign(properties,info.properties);return properties}},{key:"observers",get:function get(){var observers=[];if(behaviorList){for(var i=0,b;i<behaviorList.length;i++){b=behaviorList[i];if(b.observers){observers=observers.concat(b.observers)}}}if(info.observers){observers=observers.concat(info.observers)}return observers}}]);return PolymerGenerated}(Base);// apply behaviors, note actual copying is done lazily at first instance creation
@@ -4781,7 +4781,7 @@
      * @return {function(new:HTMLElement)} Generated class
      * @memberof Polymer
      */Polymer.Class=function(info,mixin){if(!info){console.warn("Polymer.Class requires `info` argument")}var klass=mixin?mixin(Polymer.LegacyElementMixin(HTMLElement)):Polymer.LegacyElementMixin(HTMLElement);klass=GenerateClassFromInfo(info,klass,info.behaviors);if(info._enableDisableUpgrade){klass=Polymer.DisableUpgradeMixin(klass)}// decorate klass with registration info
-klass.is=klass.prototype.is=info.is;return klass};Polymer.mixinBehaviors=mixinBehaviors})();</script><script>(function(){'use strict';/**
+klass.is=klass.prototype.is=info.is;return klass};Polymer.mixinBehaviors=mixinBehaviors})();</script><script>(function(){"use strict";/**
      * Legacy class factory and registration helper for defining Polymer
      * elements.
      *
@@ -4799,7 +4799,7 @@
      * @suppress {duplicate, invalidCasts, checkTypes}
      */window.Polymer._polymerFn=function(info){// if input is a `class` (aka a function with a prototype), use the prototype
 // remember that the `constructor` will never be called
-var klass;if("function"===typeof info){klass=info}else{klass=Polymer.Class(info)}customElements.define(klass.is,/** @type {!HTMLElement} */klass);return klass}})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';// Common implementation for mixin & behavior
+var klass;if("function"===typeof info){klass=info}else{klass=Polymer.Class(info)}customElements.define(klass.is,/** @type {!HTMLElement} */klass);return klass}})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";// Common implementation for mixin & behavior
 function mutablePropertyChange(inst,property,value,old,mutableData){var isObject;if(mutableData){isObject="object"===babelHelpers.typeof(value)&&null!==value;// Pull `old` for Objects from temp cache, but treat `null` as a primitive
 if(isObject){old=inst.__dataTemp[property]}}// Strict equality check, but return false for NaN===NaN
 var shouldChange=old!==value&&(old===old||value===value);// Objects are stored in temporary cache (cleared at end of
@@ -4847,7 +4847,7 @@
      * @polymer
      * @mixinClass
      * @implements {Polymer_MutableData}
-     */var MutableData=/*#__PURE__*/function(_superClass){babelHelpers.inherits(MutableData,_superClass);var _super=_createSuper(MutableData);function MutableData(){babelHelpers.classCallCheck(this,MutableData);return _super.apply(this,arguments)}babelHelpers.createClass(MutableData,[{key:"_shouldPropertyChange",/**
+     */var MutableData=/*#__PURE__*/function(_superClass){babelHelpers.inherits(MutableData,_superClass);var _super=_createSuper(MutableData);function MutableData(){babelHelpers.classCallCheck(this,MutableData);return _super.apply(this,arguments)}babelHelpers.createClass(MutableData,[{key:"_shouldPropertyChange",value:/**
        * Overrides `Polymer.PropertyEffects` to provide option for skipping
        * strict equality checking for Objects and Arrays.
        *
@@ -4863,7 +4863,7 @@
        * @param {*} old Previous property value
        * @return {boolean} Whether the property should be considered a change
        * @protected
-       */value:function _shouldPropertyChange(property,value,old){return mutablePropertyChange(this,property,value,old,!0)}}]);return MutableData}(superClass);return MutableData});/**
+       */function _shouldPropertyChange(property,value,old){return mutablePropertyChange(this,property,value,old,!0)}}]);return MutableData}(superClass);return MutableData});/**
    * Element class mixin to add the optional ability to skip strict
    * dirty-checking for objects and arrays (always consider them to be
    * "dirty") by setting a `mutable-data` attribute on an element instance.
@@ -4907,7 +4907,7 @@
      * @mixinClass
      * @polymer
      * @implements {Polymer_OptionalMutableData}
-     */var OptionalMutableData=/*#__PURE__*/function(_superClass2){babelHelpers.inherits(OptionalMutableData,_superClass2);var _super2=_createSuper(OptionalMutableData);function OptionalMutableData(){babelHelpers.classCallCheck(this,OptionalMutableData);return _super2.apply(this,arguments)}babelHelpers.createClass(OptionalMutableData,[{key:"_shouldPropertyChange",/**
+     */var OptionalMutableData=/*#__PURE__*/function(_superClass2){babelHelpers.inherits(OptionalMutableData,_superClass2);var _super2=_createSuper(OptionalMutableData);function OptionalMutableData(){babelHelpers.classCallCheck(this,OptionalMutableData);return _super2.apply(this,arguments)}babelHelpers.createClass(OptionalMutableData,[{key:"_shouldPropertyChange",value:/**
        * Overrides `Polymer.PropertyEffects` to provide option for skipping
        * strict equality checking for Objects and Arrays.
        *
@@ -4924,12 +4924,12 @@
        * @param {*} old Previous property value
        * @return {boolean} Whether the property should be considered a change
        * @protected
-       */value:function _shouldPropertyChange(property,value,old){return mutablePropertyChange(this,property,value,old,this.mutableData)}}],[{key:"properties",get:function get(){return{/**
+       */function _shouldPropertyChange(property,value,old){return mutablePropertyChange(this,property,value,old,this.mutableData)}}],[{key:"properties",get:function get(){return{/**
            * Instance-level flag for configuring the dirty-checking strategy
            * for this element.  When true, Objects and Arrays will skip dirty
            * checking, otherwise strict equality checking will be used.
            */mutableData:Boolean}}}]);return OptionalMutableData}(superClass);return OptionalMutableData});// Export for use by legacy behavior
-Polymer.MutableData._mutablePropertyChange=mutablePropertyChange})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';// Base class for HTMLTemplateElement extension that has property effects
+Polymer.MutableData._mutablePropertyChange=mutablePropertyChange})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";// Base class for HTMLTemplateElement extension that has property effects
 // machinery for propagating host properties to children. This is an ES5
 // class only because Babel (incorrectly) requires super() in the class
 // constructor even though no `this` is used and it returns an instance.
@@ -4953,7 +4953,7 @@
      * @constructor
      * @implements {Polymer_PropertyEffects}
      * @private
-     */var base=Polymer.PropertyEffects(/*#__PURE__*/function(){function _class(){babelHelpers.classCallCheck(this,_class)}return _class}()),TemplateInstanceBase=/*#__PURE__*/function(_base){babelHelpers.inherits(TemplateInstanceBase,_base);var _super=_createSuper(TemplateInstanceBase);function TemplateInstanceBase(props){var _this;babelHelpers.classCallCheck(this,TemplateInstanceBase);_this=_super.call(this);_this._configureProperties(props);_this.root=_this._stampTemplate(_this.__dataHost);// Save list of stamped children
+     */var base=Polymer.PropertyEffects(/*#__PURE__*/function(){function _class(){babelHelpers.classCallCheck(this,_class)}return babelHelpers.createClass(_class)}()),TemplateInstanceBase=/*#__PURE__*/function(_base){babelHelpers.inherits(TemplateInstanceBase,_base);var _super=_createSuper(TemplateInstanceBase);function TemplateInstanceBase(props){var _this;babelHelpers.classCallCheck(this,TemplateInstanceBase);_this=_super.call(this);_this._configureProperties(props);_this.root=_this._stampTemplate(_this.__dataHost);// Save list of stamped children
 for(var children=_this.children=[],n=_this.root.firstChild;n;n=n.nextSibling){children.push(n);n.__templatizeInstance=babelHelpers.assertThisInitialized(_this)}if(_this.__templatizeOwner&&_this.__templatizeOwner.__hideTemplateChildren__){_this._showHideChildren(!0)}// Flush props only when props are passed if instance props exist
 // or when there isn't instance props.
 var options=_this.__templatizeOptions;if(props&&options.instanceProps||!options.instanceProps){_this._enableProperties()}return _this}/**
@@ -5011,16 +5011,16 @@
        * or else the host element.
        *
        * @return {!Polymer_PropertyEffects} The parent model of this instance
-       */},{key:"dispatchEvent",/**
+       */},{key:"parentModel",get:function get(){var model=this.__parentModel;if(!model){var options;model=this;do{// A template instance's `__dataHost` is a <template>
+// `model.__dataHost.__dataHost` is the template's host
+model=model.__dataHost.__dataHost}while((options=model.__templatizeOptions)&&!options.parentModel);this.__parentModel=model}return model}/**
        * Stub of HTMLElement's `dispatchEvent`, so that effects that may
        * dispatch events safely no-op.
        *
        * @param {Event} event Event to dispatch
        * @return {boolean} Always true.
-       */value:function dispatchEvent(event){// eslint-disable-line no-unused-vars
-return!0}},{key:"parentModel",get:function get(){var model=this.__parentModel;if(!model){var options;model=this;do{// A template instance's `__dataHost` is a <template>
-// `model.__dataHost.__dataHost` is the template's host
-model=model.__dataHost.__dataHost}while((options=model.__templatizeOptions)&&!options.parentModel);this.__parentModel=model}return model}}]);return TemplateInstanceBase}(base);/**
+       */},{key:"dispatchEvent",value:function dispatchEvent(event){// eslint-disable-line no-unused-vars
+return!0}}]);return TemplateInstanceBase}(base);/**
      * @polymer
      * @customElement
      * @appliesMixin Polymer.PropertyEffects
@@ -5043,10 +5043,10 @@
        * @constructor
        * @extends {base}
        * @private
-       */var klass=/*#__PURE__*/function(_base2){babelHelpers.inherits(klass,_base2);var _super2=_createSuper(klass);function klass(){babelHelpers.classCallCheck(this,klass);return _super2.apply(this,arguments)}return klass}(base);klass.prototype.__templatizeOptions=options;klass.prototype._bindTemplate(template);addNotifyEffects(klass,template,templateInfo,options);return klass}/**
+       */var klass=/*#__PURE__*/function(_base2){babelHelpers.inherits(klass,_base2);var _super2=_createSuper(klass);function klass(){babelHelpers.classCallCheck(this,klass);return _super2.apply(this,arguments)}return babelHelpers.createClass(klass)}(base);klass.prototype.__templatizeOptions=options;klass.prototype._bindTemplate(template);addNotifyEffects(klass,template,templateInfo,options);return klass}/**
      * @suppress {missingProperties} class.prototype is not defined for some reason
      */function addPropagateEffects(template,templateInfo,options){var userForwardHostProp=options.forwardHostProp;if(userForwardHostProp){// Provide data API and property effects on memoized template class
-var klass=templateInfo.templatizeTemplateClass;if(!klass){var _base3=options.mutableData?MutableDataTemplate:DataTemplate;/** @private */klass=templateInfo.templatizeTemplateClass=/*#__PURE__*/function(_base4){babelHelpers.inherits(TemplatizedTemplate,_base4);var _super3=_createSuper(TemplatizedTemplate);function TemplatizedTemplate(){babelHelpers.classCallCheck(this,TemplatizedTemplate);return _super3.apply(this,arguments)}return TemplatizedTemplate}(_base3);// Add template - >instances effects
+var klass=templateInfo.templatizeTemplateClass;if(!klass){var _base3=options.mutableData?MutableDataTemplate:DataTemplate;/** @private */klass=templateInfo.templatizeTemplateClass=/*#__PURE__*/function(_base4){babelHelpers.inherits(TemplatizedTemplate,_base4);var _super3=_createSuper(TemplatizedTemplate);function TemplatizedTemplate(){babelHelpers.classCallCheck(this,TemplatizedTemplate);return _super3.apply(this,arguments)}return babelHelpers.createClass(TemplatizedTemplate)}(_base3);// Add template - >instances effects
 // and host <- template effects
 var hostProps=templateInfo.hostProps;for(var prop in hostProps){klass.prototype._addPropertyEffect("_host_"+prop,klass.prototype.PROPERTY_EFFECT_TYPES.PROPAGATE,{fn:createForwardHostPropEffect(prop,userForwardHostProp)});klass.prototype._createNotifyingProperty("_host_"+prop)}}upgradeTemplate(template,klass);// Mix any pre-bound data into __data; no need to flush this to
 // instances since they pull from the template at instance-time
@@ -5173,7 +5173,7 @@
 // e.g. for dom-if & dom-repeat in main document, _methodHost is null
 if(Polymer.strictTemplatePolicy&&!findMethodHost(template)){throw new Error("strictTemplatePolicy: template owner not trusted")}options=/** @type {!TemplatizeOptions} */options||{};if(template.__templatizeOwner){throw new Error("A <template> can only be templatized once")}template.__templatizeOwner=owner;var ctor=owner?owner.constructor:TemplateInstanceBase,templateInfo=ctor._parseTemplate(template),baseClass=templateInfo.templatizeInstanceClass;if(!baseClass){baseClass=createTemplatizerClass(template,templateInfo,options);templateInfo.templatizeInstanceClass=baseClass}// Host property forwarding must be installed onto template instance
 addPropagateEffects(template,templateInfo,options);// Subclass base class and add reference for this specific template
-/** @private */var klass=/*#__PURE__*/function(_baseClass){babelHelpers.inherits(TemplateInstance,_baseClass);var _super4=_createSuper(TemplateInstance);function TemplateInstance(){babelHelpers.classCallCheck(this,TemplateInstance);return _super4.apply(this,arguments)}return TemplateInstance}(baseClass);klass.prototype._methodHost=findMethodHost(template);klass.prototype.__dataHost=template;klass.prototype.__templatizeOwner=owner;klass.prototype.__hostProps=templateInfo.hostProps;klass=/** @type {function(new:TemplateInstanceBase)} */klass;//eslint-disable-line no-self-assign
+/** @private */var klass=/*#__PURE__*/function(_baseClass){babelHelpers.inherits(TemplateInstance,_baseClass);var _super4=_createSuper(TemplateInstance);function TemplateInstance(){babelHelpers.classCallCheck(this,TemplateInstance);return _super4.apply(this,arguments)}return babelHelpers.createClass(TemplateInstance)}(baseClass);klass.prototype._methodHost=findMethodHost(template);klass.prototype.__dataHost=template;klass.prototype.__templatizeOwner=owner;klass.prototype.__hostProps=templateInfo.hostProps;klass=/** @type {function(new:TemplateInstanceBase)} */klass;//eslint-disable-line no-self-assign
 return klass},/**
        * Returns the template "model" associated with a given element, which
        * serves as the binding scope for the template instance the element is
@@ -5201,7 +5201,7 @@
 // from its __dataHost
 if(model.__dataHost!=template){node=model.__dataHost}else{return model}}else{// Still in a template scope, keep going up until
 // a __templatizeInstance is found
-node=node.parentNode}}return null}};Polymer.TemplateInstanceBase=TemplateInstanceBase})();</script><script>(function(){'use strict';var TemplateInstanceBase=Polymer.TemplateInstanceBase,TemplatizerUser;// eslint-disable-line
+node=node.parentNode}}return null}};Polymer.TemplateInstanceBase=TemplateInstanceBase})();</script><script>(function(){"use strict";var TemplateInstanceBase=Polymer.TemplateInstanceBase,TemplatizerUser;// eslint-disable-line
 /**
      * @typedef {{
      *   _templatizerTemplate: HTMLTemplateElement,
@@ -5305,20 +5305,20 @@
        * @return {TemplateInstanceBase} Model representing the binding scope for
        *   the element.
        * @this {TemplatizerUser}
-       */modelForElement:function modelForElement(el){return Polymer.Templatize.modelForElement(this._templatizerTemplate,el)}}})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';/**
+       */modelForElement:function modelForElement(el){return Polymer.Templatize.modelForElement(this._templatizerTemplate,el)}}})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";/**
      * @constructor
      * @extends {HTMLElement}
      * @implements {Polymer_PropertyEffects}
      * @implements {Polymer_OptionalMutableData}
      * @implements {Polymer_GestureEventListeners}
      * @private
-     */var domBindBase=Polymer.GestureEventListeners(Polymer.OptionalMutableData(Polymer.PropertyEffects(HTMLElement))),DomBind=/*#__PURE__*/function(_domBindBase){babelHelpers.inherits(DomBind,_domBindBase);var _super=_createSuper(DomBind);babelHelpers.createClass(DomBind,null,[{key:"observedAttributes",get:function get(){return["mutable-data"]}}]);function DomBind(){var _this;babelHelpers.classCallCheck(this,DomBind);_this=_super.call(this);if(Polymer.strictTemplatePolicy){throw new Error("strictTemplatePolicy: dom-bind not allowed")}_this.root=null;_this.$=null;_this.__children=null;return _this}/** @return {void} */babelHelpers.createClass(DomBind,[{key:"attributeChangedCallback",value:function attributeChangedCallback(){// assumes only one observed attribute
+     */var domBindBase=Polymer.GestureEventListeners(Polymer.OptionalMutableData(Polymer.PropertyEffects(HTMLElement))),DomBind=/*#__PURE__*/function(_domBindBase){babelHelpers.inherits(DomBind,_domBindBase);var _super=_createSuper(DomBind);function DomBind(){var _this;babelHelpers.classCallCheck(this,DomBind);_this=_super.call(this);if(Polymer.strictTemplatePolicy){throw new Error("strictTemplatePolicy: dom-bind not allowed")}_this.root=null;_this.$=null;_this.__children=null;return _this}/** @return {void} */babelHelpers.createClass(DomBind,[{key:"attributeChangedCallback",value:function attributeChangedCallback(){// assumes only one observed attribute
 this.mutableData=!0}/** @return {void} */},{key:"connectedCallback",value:function connectedCallback(){this.style.display="none";this.render()}/** @return {void} */},{key:"disconnectedCallback",value:function disconnectedCallback(){this.__removeChildren()}},{key:"__insertChildren",value:function __insertChildren(){this.parentNode.insertBefore(this.root,this)}},{key:"__removeChildren",value:function __removeChildren(){if(this.__children){for(var i=0;i<this.__children.length;i++){this.root.appendChild(this.__children[i])}}}/**
        * Forces the element to render its content. This is typically only
        * necessary to call if HTMLImports with the async attribute are used.
        * @return {void}
        */},{key:"render",value:function render(){var _this2=this,template;if(!this.__children){template=/** @type {HTMLTemplateElement} */template||this.querySelector("template");if(!template){// Wait until childList changes and template should be there by then
-var observer=new MutationObserver(function(){template=/** @type {HTMLTemplateElement} */_this2.querySelector("template");if(template){observer.disconnect();_this2.render()}else{throw new Error("dom-bind requires a <template> child")}});observer.observe(this,{childList:!0});return}this.root=this._stampTemplate(template);this.$=this.root.$;this.__children=[];for(var n=this.root.firstChild;n;n=n.nextSibling){this.__children[this.__children.length]=n}this._enableProperties()}this.__insertChildren();this.dispatchEvent(new CustomEvent("dom-change",{bubbles:!0,composed:!0}))}}]);return DomBind}(domBindBase);/**
+var observer=new MutationObserver(function(){template=/** @type {HTMLTemplateElement} */_this2.querySelector("template");if(template){observer.disconnect();_this2.render()}else{throw new Error("dom-bind requires a <template> child")}});observer.observe(this,{childList:!0});return}this.root=this._stampTemplate(template);this.$=this.root.$;this.__children=[];for(var n=this.root.firstChild;n;n=n.nextSibling){this.__children[this.__children.length]=n}this._enableProperties()}this.__insertChildren();this.dispatchEvent(new CustomEvent("dom-change",{bubbles:!0,composed:!0}))}}],[{key:"observedAttributes",get:function get(){return["mutable-data"]}}]);return DomBind}(domBindBase);/**
      * Custom element to allow using Polymer's template features (data binding,
      * declarative event listeners, etc.) in the main document without defining
      * a new custom element.
@@ -5337,7 +5337,7 @@
      * @memberof Polymer
      * @summary Custom element to allow using Polymer's template features (data
      *   binding, declarative event listeners, etc.) in the main document.
-     */customElements.define("dom-bind",DomBind);/** @const */Polymer.DomBind=DomBind})();</script><script>(function(){'use strict';/**
+     */customElements.define("dom-bind",DomBind);/** @const */Polymer.DomBind=DomBind})();</script><script>(function(){"use strict";/**
      * Class representing a static string value which can be used to filter
      * strings by asseting that they have been created via this class. The
      * `value` property returns the string passed to the constructor.
@@ -5405,7 +5405,7 @@
      * @param {!ITemplateArray} strings Constant parts of tagged template literal
      * @param {...*} values Variable parts of tagged template literal
      * @return {!LiteralString} Constructed literal string
-     */Polymer.htmlLiteral=function(strings){for(var _len2=arguments.length,values=Array(1<_len2?_len2-1:0),_key2=1;_key2<_len2;_key2++){values[_key2-1]=arguments[_key2]}return new LiteralString(values.reduce(function(acc,v,idx){return acc+literalValue(v)+strings[idx+1]},strings[0]))}})();</script><script>(function(){'use strict';/**
+     */Polymer.htmlLiteral=function(strings){for(var _len2=arguments.length,values=Array(1<_len2?_len2-1:0),_key2=1;_key2<_len2;_key2++){values[_key2-1]=arguments[_key2]}return new LiteralString(values.reduce(function(acc,v,idx){return acc+literalValue(v)+strings[idx+1]},strings[0]))}})();</script><script>(function(){"use strict";/**
    * Base class that provides the core API for Polymer's meta-programming
    * features including template stamping, data-binding, attribute deserialization,
    * and property change observation.
@@ -5420,77 +5420,7 @@
    *   key meta-programming features including template stamping, data-binding,
    *   attribute deserialization, and property change observation
    */Polymer.Element=Polymer.ElementMixin(HTMLElement);// NOTE: this is here for modulizer to export `html` for the module version of this file
-Polymer.html=Polymer.html})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var TemplateInstanceBase=Polymer.TemplateInstanceBase,domRepeatBase=Polymer.OptionalMutableData(Polymer.Element),DomRepeat=/*#__PURE__*/function(_domRepeatBase){babelHelpers.inherits(DomRepeat,_domRepeatBase);var _super=_createSuper(DomRepeat);babelHelpers.createClass(DomRepeat,null,[{key:"is",// Not needed to find template; can be removed once the analyzer
-// can find the tag name from customElements.define call
-get:function get(){return"dom-repeat"}},{key:"template",get:function get(){return null}},{key:"properties",get:function get(){/**
-       * Fired whenever DOM is added or removed by this template (by
-       * default, rendering occurs lazily).  To force immediate rendering, call
-       * `render`.
-       *
-       * @event dom-change
-       */return{/**
-         * An array containing items determining how many instances of the template
-         * to stamp and that that each template instance should bind to.
-         */items:{type:Array},/**
-         * The name of the variable to add to the binding scope for the array
-         * element associated with a given template instance.
-         */as:{type:String,value:"item"},/**
-         * The name of the variable to add to the binding scope with the index
-         * of the instance in the sorted and filtered list of rendered items.
-         * Note, for the index in the `this.items` array, use the value of the
-         * `itemsIndexAs` property.
-         */indexAs:{type:String,value:"index"},/**
-         * The name of the variable to add to the binding scope with the index
-         * of the instance in the `this.items` array. Note, for the index of
-         * this instance in the sorted and filtered list of rendered items,
-         * use the value of the `indexAs` property.
-         */itemsIndexAs:{type:String,value:"itemsIndex"},/**
-         * A function that should determine the sort order of the items.  This
-         * property should either be provided as a string, indicating a method
-         * name on the element's host, or else be an actual function.  The
-         * function should match the sort function passed to `Array.sort`.
-         * Using a sort function has no effect on the underlying `items` array.
-         */sort:{type:Function,observer:"__sortChanged"},/**
-         * A function that can be used to filter items out of the view.  This
-         * property should either be provided as a string, indicating a method
-         * name on the element's host, or else be an actual function.  The
-         * function should match the sort function passed to `Array.filter`.
-         * Using a filter function has no effect on the underlying `items` array.
-         */filter:{type:Function,observer:"__filterChanged"},/**
-         * When using a `filter` or `sort` function, the `observe` property
-         * should be set to a space-separated list of the names of item
-         * sub-fields that should trigger a re-sort or re-filter when changed.
-         * These should generally be fields of `item` that the sort or filter
-         * function depends on.
-         */observe:{type:String,observer:"__observeChanged"},/**
-         * When using a `filter` or `sort` function, the `delay` property
-         * determines a debounce time in ms after a change to observed item
-         * properties that must pass before the filter or sort is re-run.
-         * This is useful in rate-limiting shuffling of the view when
-         * item changes may be frequent.
-         */delay:Number,/**
-         * Count of currently rendered items after `filter` (if any) has been applied.
-         * If "chunking mode" is enabled, `renderedItemCount` is updated each time a
-         * set of template instances is rendered.
-         *
-         */renderedItemCount:{type:Number,notify:!0,readOnly:!0},/**
-         * Defines an initial count of template instances to render after setting
-         * the `items` array, before the next paint, and puts the `dom-repeat`
-         * into "chunking mode".  The remaining items will be created and rendered
-         * incrementally at each animation frame therof until all instances have
-         * been rendered.
-         */initialCount:{type:Number,observer:"__initializeChunking"},/**
-         * When `initialCount` is used, this property defines a frame rate (in
-         * fps) to target by throttling the number of instances rendered each
-         * frame to not exceed the budget for the target frame rate.  The
-         * framerate is effectively the number of `requestAnimationFrame`s that
-         * it tries to allow to actually fire in a given second. It does this
-         * by measuring the time between `rAF`s and continuously adjusting the
-         * number of items created each `rAF` to maintain the target framerate.
-         * Setting this to a higher number allows lower latency and higher
-         * throughput for event handlers and other tasks, but results in a
-         * longer time for the remaining items to complete rendering.
-         */targetFramerate:{type:Number,value:20},_targetFrameTime:{type:Number,computed:"__computeFrameTime(targetFramerate)"}}}},{key:"observers",get:function get(){return["__itemsChanged(items.*)"]}}]);function DomRepeat(){var _this;babelHelpers.classCallCheck(this,DomRepeat);_this=_super.call(this);_this.__instances=[];_this.__limit=1/0;_this.__pool=[];_this.__renderDebouncer=null;_this.__itemsIdxToInstIdx={};_this.__chunkCount=null;_this.__lastChunkTime=null;_this.__sortFn=null;_this.__filterFn=null;_this.__observePaths=null;_this.__ctor=null;_this.__isDetached=!0;_this.template=null;return _this}/**
+Polymer.html=Polymer.html})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var TemplateInstanceBase=Polymer.TemplateInstanceBase,domRepeatBase=Polymer.OptionalMutableData(Polymer.Element),DomRepeat=/*#__PURE__*/function(_domRepeatBase){babelHelpers.inherits(DomRepeat,_domRepeatBase);var _super=_createSuper(DomRepeat);function DomRepeat(){var _this;babelHelpers.classCallCheck(this,DomRepeat);_this=_super.call(this);_this.__instances=[];_this.__limit=1/0;_this.__pool=[];_this.__renderDebouncer=null;_this.__itemsIdxToInstIdx={};_this.__chunkCount=null;_this.__lastChunkTime=null;_this.__sortFn=null;_this.__filterFn=null;_this.__observePaths=null;_this.__ctor=null;_this.__isDetached=!0;_this.template=null;return _this}/**
      * @return {void}
      */babelHelpers.createClass(DomRepeat,[{key:"disconnectedCallback",value:function disconnectedCallback(){babelHelpers.get(babelHelpers.getPrototypeOf(DomRepeat.prototype),"disconnectedCallback",this).call(this);this.__isDetached=!0;for(var i=0;i<this.__instances.length;i++){this.__detachInstance(i)}}/**
      * @return {void}
@@ -5606,13 +5536,83 @@
      * @param {!HTMLElement} el Element for which to return a template model.
      * @return {TemplateInstanceBase} Model representing the binding scope for
      *   the element.
-     */},{key:"modelForElement",value:function modelForElement(el){return Polymer.Templatize.modelForElement(this.template,el)}}]);return DomRepeat}(domRepeatBase);// eslint-disable-line
+     */},{key:"modelForElement",value:function modelForElement(el){return Polymer.Templatize.modelForElement(this.template,el)}}],[{key:"is",get:// Not needed to find template; can be removed once the analyzer
+// can find the tag name from customElements.define call
+function get(){return"dom-repeat"}},{key:"template",get:function get(){return null}},{key:"properties",get:function get(){/**
+       * Fired whenever DOM is added or removed by this template (by
+       * default, rendering occurs lazily).  To force immediate rendering, call
+       * `render`.
+       *
+       * @event dom-change
+       */return{/**
+         * An array containing items determining how many instances of the template
+         * to stamp and that that each template instance should bind to.
+         */items:{type:Array},/**
+         * The name of the variable to add to the binding scope for the array
+         * element associated with a given template instance.
+         */as:{type:String,value:"item"},/**
+         * The name of the variable to add to the binding scope with the index
+         * of the instance in the sorted and filtered list of rendered items.
+         * Note, for the index in the `this.items` array, use the value of the
+         * `itemsIndexAs` property.
+         */indexAs:{type:String,value:"index"},/**
+         * The name of the variable to add to the binding scope with the index
+         * of the instance in the `this.items` array. Note, for the index of
+         * this instance in the sorted and filtered list of rendered items,
+         * use the value of the `indexAs` property.
+         */itemsIndexAs:{type:String,value:"itemsIndex"},/**
+         * A function that should determine the sort order of the items.  This
+         * property should either be provided as a string, indicating a method
+         * name on the element's host, or else be an actual function.  The
+         * function should match the sort function passed to `Array.sort`.
+         * Using a sort function has no effect on the underlying `items` array.
+         */sort:{type:Function,observer:"__sortChanged"},/**
+         * A function that can be used to filter items out of the view.  This
+         * property should either be provided as a string, indicating a method
+         * name on the element's host, or else be an actual function.  The
+         * function should match the sort function passed to `Array.filter`.
+         * Using a filter function has no effect on the underlying `items` array.
+         */filter:{type:Function,observer:"__filterChanged"},/**
+         * When using a `filter` or `sort` function, the `observe` property
+         * should be set to a space-separated list of the names of item
+         * sub-fields that should trigger a re-sort or re-filter when changed.
+         * These should generally be fields of `item` that the sort or filter
+         * function depends on.
+         */observe:{type:String,observer:"__observeChanged"},/**
+         * When using a `filter` or `sort` function, the `delay` property
+         * determines a debounce time in ms after a change to observed item
+         * properties that must pass before the filter or sort is re-run.
+         * This is useful in rate-limiting shuffling of the view when
+         * item changes may be frequent.
+         */delay:Number,/**
+         * Count of currently rendered items after `filter` (if any) has been applied.
+         * If "chunking mode" is enabled, `renderedItemCount` is updated each time a
+         * set of template instances is rendered.
+         *
+         */renderedItemCount:{type:Number,notify:!0,readOnly:!0},/**
+         * Defines an initial count of template instances to render after setting
+         * the `items` array, before the next paint, and puts the `dom-repeat`
+         * into "chunking mode".  The remaining items will be created and rendered
+         * incrementally at each animation frame therof until all instances have
+         * been rendered.
+         */initialCount:{type:Number,observer:"__initializeChunking"},/**
+         * When `initialCount` is used, this property defines a frame rate (in
+         * fps) to target by throttling the number of instances rendered each
+         * frame to not exceed the budget for the target frame rate.  The
+         * framerate is effectively the number of `requestAnimationFrame`s that
+         * it tries to allow to actually fire in a given second. It does this
+         * by measuring the time between `rAF`s and continuously adjusting the
+         * number of items created each `rAF` to maintain the target framerate.
+         * Setting this to a higher number allows lower latency and higher
+         * throughput for event handlers and other tasks, but results in a
+         * longer time for the remaining items to complete rendering.
+         */targetFramerate:{type:Number,value:20},_targetFrameTime:{type:Number,computed:"__computeFrameTime(targetFramerate)"}}}},{key:"observers",get:function get(){return["__itemsChanged(items.*)"]}}]);return DomRepeat}(domRepeatBase);// eslint-disable-line
 /**
    * @constructor
    * @implements {Polymer_OptionalMutableData}
    * @extends {Polymer.Element}
    * @private
-   */customElements.define(DomRepeat.is,DomRepeat);/** @const */Polymer.DomRepeat=DomRepeat})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';/**
+   */customElements.define(DomRepeat.is,DomRepeat);/** @const */Polymer.DomRepeat=DomRepeat})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";/**
    * The `<dom-if>` element will stamp a light-dom `<template>` child when
    * the `if` property becomes truthy, and the template can use Polymer
    * data-binding and declarative event features when used in the context of
@@ -5633,23 +5633,7 @@
    * @memberof Polymer
    * @summary Custom element that conditionally stamps and hides or removes
    *   template content based on a boolean flag.
-   */var DomIf=/*#__PURE__*/function(_Polymer$Element){babelHelpers.inherits(DomIf,_Polymer$Element);var _super=_createSuper(DomIf);babelHelpers.createClass(DomIf,null,[{key:"is",// Not needed to find template; can be removed once the analyzer
-// can find the tag name from customElements.define call
-get:function get(){return"dom-if"}},{key:"template",get:function get(){return null}},{key:"properties",get:function get(){return{/**
-         * Fired whenever DOM is added or removed/hidden by this template (by
-         * default, rendering occurs lazily).  To force immediate rendering, call
-         * `render`.
-         *
-         * @event dom-change
-         */ /**
-         * A boolean indicating whether this template should stamp.
-         */if:{type:Boolean,observer:"__debounceRender"},/**
-         * When true, elements will be removed from DOM and discarded when `if`
-         * becomes false and re-created and added back to the DOM when `if`
-         * becomes true.  By default, stamped elements will be hidden but left
-         * in the DOM when `if` becomes false, which is generally results
-         * in better performance.
-         */restamp:{type:Boolean,observer:"__debounceRender"}}}}]);function DomIf(){var _this;babelHelpers.classCallCheck(this,DomIf);_this=_super.call(this);_this.__renderDebouncer=null;_this.__invalidProps=null;_this.__instance=null;_this._lastIf=!1;_this.__ctor=null;return _this}babelHelpers.createClass(DomIf,[{key:"__debounceRender",value:function __debounceRender(){var _this2=this;// Render is async for 2 reasons:
+   */var DomIf=/*#__PURE__*/function(_Polymer$Element){babelHelpers.inherits(DomIf,_Polymer$Element);var _super=_createSuper(DomIf);function DomIf(){var _this;babelHelpers.classCallCheck(this,DomIf);_this=_super.call(this);_this.__renderDebouncer=null;_this.__invalidProps=null;_this.__instance=null;_this._lastIf=!1;_this.__ctor=null;return _this}babelHelpers.createClass(DomIf,[{key:"__debounceRender",value:function __debounceRender(){var _this2=this;// Render is async for 2 reasons:
 // 1. To eliminate dom creation trashing if user code thrashes `if` in the
 //    same turn. This was more common in 1.x where a compound computed
 //    property could result in the result changing multiple times, but is
@@ -5699,7 +5683,23 @@
      * "shown."
      * @return {void}
      * @protected
-     */},{key:"_showHideChildren",value:function _showHideChildren(){var hidden=this.__hideTemplateChildren__||!this.if;if(this.__instance){this.__instance._showHideChildren(hidden)}}}]);return DomIf}(Polymer.Element);customElements.define(DomIf.is,DomIf);/** @const */Polymer.DomIf=DomIf})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';/**
+     */},{key:"_showHideChildren",value:function _showHideChildren(){var hidden=this.__hideTemplateChildren__||!this.if;if(this.__instance){this.__instance._showHideChildren(hidden)}}}],[{key:"is",get:// Not needed to find template; can be removed once the analyzer
+// can find the tag name from customElements.define call
+function get(){return"dom-if"}},{key:"template",get:function get(){return null}},{key:"properties",get:function get(){return{/**
+         * Fired whenever DOM is added or removed/hidden by this template (by
+         * default, rendering occurs lazily).  To force immediate rendering, call
+         * `render`.
+         *
+         * @event dom-change
+         */ /**
+         * A boolean indicating whether this template should stamp.
+         */if:{type:Boolean,observer:"__debounceRender"},/**
+         * When true, elements will be removed from DOM and discarded when `if`
+         * becomes false and re-created and added back to the DOM when `if`
+         * becomes true.  By default, stamped elements will be hidden but left
+         * in the DOM when `if` becomes false, which is generally results
+         * in better performance.
+         */restamp:{type:Boolean,observer:"__debounceRender"}}}}]);return DomIf}(Polymer.Element);customElements.define(DomIf.is,DomIf);/** @const */Polymer.DomIf=DomIf})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";/**
    * Element mixin for recording dynamic associations between item paths in a
    * master `items` array and a `selected` array such that path changes to the
    * master array (at the host) element or elsewhere via data-binding) are
@@ -5724,35 +5724,17 @@
      * @extends {superClass}
      * @implements {Polymer_ElementMixin}
      * @private
-     */var elementBase=Polymer.ElementMixin(superClass),ArraySelectorMixin=/*#__PURE__*/function(_elementBase){babelHelpers.inherits(ArraySelectorMixin,_elementBase);var _super=_createSuper(ArraySelectorMixin);babelHelpers.createClass(ArraySelectorMixin,null,[{key:"properties",get:function get(){return{/**
-           * An array containing items from which selection will be made.
-           */items:{type:Array},/**
-           * When `true`, multiple items may be selected at once (in this case,
-           * `selected` is an array of currently selected items).  When `false`,
-           * only one item may be selected at a time.
-           */multi:{type:Boolean,value:!1},/**
-           * When `multi` is true, this is an array that contains any selected.
-           * When `multi` is false, this is the currently selected item, or `null`
-           * if no item is selected.
-           * @type {?(Object|Array<!Object>)}
-           */selected:{type:Object,notify:!0},/**
-           * When `multi` is false, this is the currently selected item, or `null`
-           * if no item is selected.
-           * @type {?Object}
-           */selectedItem:{type:Object,notify:!0},/**
-           * When `true`, calling `select` on an item that is already selected
-           * will deselect the item.
-           */toggle:{type:Boolean,value:!1}}}},{key:"observers",get:function get(){return["__updateSelection(multi, items.*)"]}}]);function ArraySelectorMixin(){var _this;babelHelpers.classCallCheck(this,ArraySelectorMixin);_this=_super.call(this);_this.__lastItems=null;_this.__lastMulti=null;_this.__selectedMap=null;return _this}babelHelpers.createClass(ArraySelectorMixin,[{key:"__updateSelection",value:function __updateSelection(multi,itemsInfo){var path=itemsInfo.path;if(path==JSCompiler_renameProperty("items",this)){// Case 1 - items array changed, so diff against previous array and
+     */var elementBase=Polymer.ElementMixin(superClass),ArraySelectorMixin=/*#__PURE__*/function(_elementBase){babelHelpers.inherits(ArraySelectorMixin,_elementBase);var _super=_createSuper(ArraySelectorMixin);function ArraySelectorMixin(){var _this;babelHelpers.classCallCheck(this,ArraySelectorMixin);_this=_super.call(this);_this.__lastItems=null;_this.__lastMulti=null;_this.__selectedMap=null;return _this}babelHelpers.createClass(ArraySelectorMixin,[{key:"__updateSelection",value:function __updateSelection(multi,itemsInfo){var path=itemsInfo.path;if(path==JSCompiler_renameProperty("items",this)){// Case 1 - items array changed, so diff against previous array and
 // deselect any removed items and adjust selected indices
 var newItems=itemsInfo.base||[],lastItems=this.__lastItems,lastMulti=this.__lastMulti;if(multi!==lastMulti){this.clearSelection()}if(lastItems){var splices=Polymer.ArraySplice.calculateSplices(newItems,lastItems);this.__applySplices(splices)}this.__lastItems=newItems;this.__lastMulti=multi}else if(itemsInfo.path=="".concat(JSCompiler_renameProperty("items",this),".splices")){// Case 2 - got specific splice information describing the array mutation:
 // deselect any removed items and adjust selected indices
 this.__applySplices(itemsInfo.value.indexSplices)}else{// Case 3 - an array element was changed, so deselect the previous
 // item for that index if it was previously selected
 var part=path.slice("".concat(JSCompiler_renameProperty("items",this),".").length),idx=parseInt(part,10);if(0>part.indexOf(".")&&part==idx){this.__deselectChangedIdx(idx)}}}},{key:"__applySplices",value:function __applySplices(splices){// Adjust selected indices and mark removals
-for(var _this2=this,selected=this.__selectedMap,_loop=function _loop(i){var s=splices[i];selected.forEach(function(idx,item){if(idx<s.index){// no change
+for(var _this2=this,selected=this.__selectedMap,_loop=function _loop(){var s=splices[i];selected.forEach(function(idx,item){if(idx<s.index){// no change
 }else if(idx>=s.index+s.removed.length){// adjust index
 selected.set(item,idx+s.addedCount-s.removed.length)}else{// remove index
-selected.set(item,-1)}});for(var j=0,idx;j<s.addedCount;j++){idx=s.index+j;if(selected.has(_this2.items[idx])){selected.set(_this2.items[idx],idx)}}},i=0;i<splices.length;i++){_loop(i)}// Update linked paths
+selected.set(item,-1)}});for(var j=0,idx;j<s.addedCount;j++){idx=s.index+j;if(selected.has(_this2.items[idx])){selected.set(_this2.items[idx],idx)}}},i=0;i<splices.length;i++){_loop()}// Update linked paths
 this.__updateLinks();// Remove selected items that were removed from the items array
 var sidx=0;selected.forEach(function(idx,item){if(0>idx){if(_this2.multi){_this2.splice(JSCompiler_renameProperty("selected",_this2),sidx,1)}else{_this2.selected=_this2.selectedItem=null}selected.delete(item)}else{sidx++}})}},{key:"__updateLinks",value:function __updateLinks(){var _this3=this;this.__dataLinkedPaths={};if(this.multi){var sidx=0;this.__selectedMap.forEach(function(idx){if(0<=idx){_this3.linkPaths("".concat(JSCompiler_renameProperty("items",_this3),".").concat(idx),"".concat(JSCompiler_renameProperty("selected",_this3),".").concat(sidx++))}})}else{this.__selectedMap.forEach(function(idx){_this3.linkPaths(JSCompiler_renameProperty("selected",_this3),"".concat(JSCompiler_renameProperty("items",_this3),".").concat(idx));_this3.linkPaths(JSCompiler_renameProperty("selectedItem",_this3),"".concat(JSCompiler_renameProperty("items",_this3),".").concat(idx))})}}/**
        * Clears the selection state.
@@ -5795,7 +5777,25 @@
        *
        * @param {number} idx Index from `items` array to select
        * @return {void}
-       */},{key:"selectIndex",value:function selectIndex(idx){var item=this.items[idx];if(!this.isSelected(item)){if(!this.multi){this.__selectedMap.clear()}this.__selectedMap.set(item,idx);this.__updateLinks();if(this.multi){this.push(JSCompiler_renameProperty("selected",this),item)}else{this.selected=this.selectedItem=item}}else if(this.toggle){this.deselectIndex(idx)}}}]);return ArraySelectorMixin}(elementBase);/**
+       */},{key:"selectIndex",value:function selectIndex(idx){var item=this.items[idx];if(!this.isSelected(item)){if(!this.multi){this.__selectedMap.clear()}this.__selectedMap.set(item,idx);this.__updateLinks();if(this.multi){this.push(JSCompiler_renameProperty("selected",this),item)}else{this.selected=this.selectedItem=item}}else if(this.toggle){this.deselectIndex(idx)}}}],[{key:"properties",get:function get(){return{/**
+           * An array containing items from which selection will be made.
+           */items:{type:Array},/**
+           * When `true`, multiple items may be selected at once (in this case,
+           * `selected` is an array of currently selected items).  When `false`,
+           * only one item may be selected at a time.
+           */multi:{type:Boolean,value:!1},/**
+           * When `multi` is true, this is an array that contains any selected.
+           * When `multi` is false, this is the currently selected item, or `null`
+           * if no item is selected.
+           * @type {?(Object|Array<!Object>)}
+           */selected:{type:Object,notify:!0},/**
+           * When `multi` is false, this is the currently selected item, or `null`
+           * if no item is selected.
+           * @type {?Object}
+           */selectedItem:{type:Object,notify:!0},/**
+           * When `true`, calling `select` on an item that is already selected
+           * will deselect the item.
+           */toggle:{type:Boolean,value:!1}}}},{key:"observers",get:function get(){return["__updateSelection(multi, items.*)"]}}]);return ArraySelectorMixin}(elementBase);/**
      * @polymer
      * @mixinClass
      * @implements {Polymer_ArraySelectorMixin}
@@ -5806,9 +5806,9 @@
    * @extends {Polymer.Element}
    * @implements {Polymer_ArraySelectorMixin}
    * @private
-   */var baseArraySelector=ArraySelectorMixin(Polymer.Element),ArraySelector=/*#__PURE__*/function(_baseArraySelector){babelHelpers.inherits(ArraySelector,_baseArraySelector);var _super2=_createSuper(ArraySelector);function ArraySelector(){babelHelpers.classCallCheck(this,ArraySelector);return _super2.apply(this,arguments)}babelHelpers.createClass(ArraySelector,null,[{key:"is",// Not needed to find template; can be removed once the analyzer
+   */var baseArraySelector=ArraySelectorMixin(Polymer.Element),ArraySelector=/*#__PURE__*/function(_baseArraySelector){babelHelpers.inherits(ArraySelector,_baseArraySelector);var _super2=_createSuper(ArraySelector);function ArraySelector(){babelHelpers.classCallCheck(this,ArraySelector);return _super2.apply(this,arguments)}babelHelpers.createClass(ArraySelector,null,[{key:"is",get:// Not needed to find template; can be removed once the analyzer
 // can find the tag name from customElements.define call
-get:function get(){return"array-selector"}}]);return ArraySelector}(baseArraySelector);/**
+function get(){return"array-selector"}}]);return ArraySelector}(baseArraySelector);/**
    * Element implementing the `Polymer.ArraySelector` mixin, which records
    * dynamic associations between item paths in a master `items` array and a
    * `selected` array such that path changes to the master array (at the host)
@@ -5892,7 +5892,7 @@
 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 Code distributed by Google as part of the polymer project is also
 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
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      * Returns the light-DOM `<style>` child this element wraps.  Upon first
      * call any style modules referenced via the `include` attribute will be
      * concatenated to this element's `<style>`.
@@ -5907,7 +5907,7 @@
 
       The ordering of `<custom-style>` should stay the same as when loaded by HTML Imports, but there may be odd
       cases of ordering w.r.t the main document styles.
-      */if(this.ownerDocument!==window.document){window.document.head.appendChild(this)}return this._style}}]);return CustomStyle}(/*#__PURE__*/babelHelpers.wrapNativeSuper(HTMLElement));window.customElements.define("custom-style",CustomStyle);/** @const */Polymer.CustomStyle=CustomStyle})();</script><script>(function(){'use strict';var mutablePropertyChange;/** @suppress {missingProperties} */(function(){mutablePropertyChange=Polymer.MutableData._mutablePropertyChange})();/**
+      */if(this.ownerDocument!==window.document){window.document.head.appendChild(this)}return this._style}}]);return CustomStyle}(/*#__PURE__*/babelHelpers.wrapNativeSuper(HTMLElement));window.customElements.define("custom-style",CustomStyle);/** @const */Polymer.CustomStyle=CustomStyle})();</script><script>(function(){"use strict";var mutablePropertyChange;/** @suppress {missingProperties} */(function(){mutablePropertyChange=Polymer.MutableData._mutablePropertyChange})();/**
    * Legacy element behavior to skip strict dirty-checking for objects and arrays,
    * (always consider them to be "dirty") for use on legacy API Polymer elements.
    *
@@ -6682,7 +6682,7 @@
        * @method getScrollState
        * @return {Object}
        */getScrollState:function getScrollState(){return{progress:this._progress,top:this._top}}});</script></dom-module><dom-module id="app-toolbar" assetpath="../app-layout/app-toolbar/"><template><style>:host{@apply --layout-horizontal;@apply --layout-center;position:relative;height:64px;padding:0 16px;pointer-events:none;font-size:var(--app-toolbar-font-size, 20px);}:host ::slotted(*){pointer-events:auto;}:host ::slotted(paper-icon-button){font-size:0;}:host ::slotted([main-title]),
-      :host ::slotted([condensed-title]){pointer-events:none;@apply --layout-flex;}:host ::slotted([bottom-item]){position:absolute;right:0;bottom:0;left:0;}:host ::slotted([top-item]){position:absolute;top:0;right:0;left:0;}:host ::slotted([spacer]){margin-left:64px;}</style><slot></slot></template><script>Polymer({is:"app-toolbar"});</script></dom-module><script>'use strict';Polymer({is:"iron-request",hostAttributes:{hidden:!0},properties:{/**
+      :host ::slotted([condensed-title]){pointer-events:none;@apply --layout-flex;}:host ::slotted([bottom-item]){position:absolute;right:0;bottom:0;left:0;}:host ::slotted([top-item]){position:absolute;top:0;right:0;left:0;}:host ::slotted([spacer]){margin-left:64px;}</style><slot></slot></template><script>Polymer({is:"app-toolbar"});</script></dom-module><script>"use strict";Polymer({is:"iron-request",hostAttributes:{hidden:!0},properties:{/**
        * A reference to the XMLHttpRequest instance used to generate the
        * network request.
        *
@@ -6807,7 +6807,7 @@
 // jQuery does this as well, so this is likely to be widely compatible.
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      * Updates the status code and status text.
-     */_updateStatus:function _updateStatus(){this._setStatus(this.xhr.status);this._setStatusText(this.xhr.statusText===void 0?"":this.xhr.statusText)}});</script><script>'use strict';Polymer({is:"iron-ajax",/**
+     */_updateStatus:function _updateStatus(){this._setStatus(this.xhr.status);this._setStatusText(this.xhr.statusText===void 0?"":this.xhr.statusText)}});</script><script>"use strict";Polymer({is:"iron-ajax",/**
      * Fired before a request is sent.
      *
      * @event iron-ajax-presend
@@ -7001,7 +7001,7 @@
       .markdown-html th{padding:6px 12px;}.markdown-html td:first-child,
       .markdown-html th:first-child{padding-left:24px;}.markdown-html td:last-child,
       .markdown-html th:last-child{padding-right:24px;}.markdown-html td:first-child > code{color:black;font-weight:bold;}.markdown-html code{@apply --iron-doc-font-code;background-color:#f5f5f5;border-radius:3px;}.markdown-html p{padding:0;}.markdown-html a{@apply --iron-doc-font-body;background:none;color:#1565c0;font-weight:500;text-decoration:none;}</style></template></dom-module><dom-module id="iron-doc-nav" assetpath="../iron-doc-viewer/"><template><style include="iron-doc-viewer-styles">:host{display:block;}section{@apply --iron-doc-font-body;border-bottom:1px solid #e0e0e0;}h3{@apply --paper-font-subhead;color:#717171;padding:0 24px;}ul{list-style:none;padding:0;}li{line-height:30px;}a{color:#333;padding:0 24px;display:block;text-decoration:none;}a:hover{color:var(--iron-doc-accent-color-internal) !important;}a[selected]{color:var(--iron-doc-accent-color-internal);}.tray{transition:height 180ms linear, opacity 180ms linear;box-sizing:border-box;overflow:hidden;}.tray:not([expanded]){height:0 !important;opacity:0;visibility:hidden;}.tray[expanded]{opacity:1;visibility:visible;}.tray ul{padding:10px 0;margin:10px 0;white-space:nowrap;background-color:#eee;border-top:1px solid #dedede;border-bottom:1px solid white;}.tray a{padding-left:35px;color:#333;}</style><template is="dom-repeat" items="[[_sections]]" as="section"><section hidden$="[[!section.items.length]]"><h3>[[section.heading]]</h3><ul><template is="dom-repeat" items="[[section.items]]"><li><a href="[[baseHref]][[item.path]]" title$="[[item.name]]" on-tap="_select" selected$="[[_isSelected(item.path, path)]]">[[item.name]]</a><div class="tray" expanded$="[[_isExpanded(item, path)]]"><ul><template is="dom-repeat" items="[[item.demos]]" as="demo"><li><a href="[[baseHref]][[demo.path]]" title$="[[demo.description]]" on-tap="_select" selected$="[[_isSelected(demo.path, path)]]">[[demo.description]]</a></li></template></ul></div></li></template></ul></section></template></template><script>(function(){Polymer({is:"iron-doc-nav",properties:{descriptor:{type:Object,observer:"_descriptorChanged"},path:String,baseHref:{type:String,value:"#"},_sections:Array},_descriptorChanged:function _descriptorChanged(descriptor){descriptor=descriptor||{};this._sections=[_section("Namespaces","/namespaces/",descriptor.namespaces),_section("Elements","/elements/",descriptor.elements),_section("Behaviors","/behaviors/",((descriptor.metadata||{}).polymer||{}).behaviors),_section("Mixins","/mixins/",descriptor.mixins),_section("Classes","/classes/",descriptor.classes)];// Store the height of each expanding tray for transitions.
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+Polymer.dom.flush();for(var trays=Polymer.dom(this.root).querySelectorAll(".tray"),i=0;i<trays.length;i++){var tray=trays[i],expanded=tray.hasAttribute("expanded");if(!expanded){tray.setAttribute("expanded","")}tray.style.height="auto";tray.style.height=tray.offsetHeight+"px";if(!expanded){tray.removeAttribute("expanded","")}}},_select:function _select(event){this.fire("select")},_isSelected:function _isSelected(a,b){return a===b},_isExpanded:function _isExpanded(item,path){return!!(item&&path&&item.path&&item.demos&&0<item.demos.length&&(path===item.path||0===path.indexOf(item.path+"/")))}});function _section(heading,pathPrefix,descriptorItems){for(var sectionItems=[],i=0;i<(descriptorItems||[]).length;i++){var item=descriptorItems[i],name=item.tagname?"<"+item.tagname+">":item.name;if(!name){continue}for(var path=pathPrefix+(item.tagname||item.name),demos=[],d=0,demo;d<(item.demos||[]).length;d++){demo=item.demos[d];if(!demo.url){continue}var demoPath=demo.description?demo.description.toLowerCase().replace(/\s+/g,"-"):demo.url;demos.push({path:path+"/demos/"+demoPath,description:demo.description||"Demo"})}sectionItems.push({name:name,path:path,demos:demos})}sectionItems.sort(function(a,b){return a.name.localeCompare(b.name)});return{heading:heading,items:sectionItems}}})();</script></dom-module><script>(function(){"use strict";var workingURL,urlDoc,urlBase,anchor;/**
    * @param {string} path
    * @param {string=} base
    * @return {!URL|!HTMLAnchorElement}
@@ -7086,7 +7086,7 @@
  * marked - a markdown parser
  * Copyright (c) 2011-2014, Christopher Jeffrey. (MIT Licensed)
  * https://github.com/markedjs/marked
- */;(function(root){'use strict';/**
+ */;(function(root){"use strict";/**
  * Block-Level Grammar
  */var block={newline:/^\n+/,code:/^( {4}[^\n]+\n*)+/,fences:noop,hr:/^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,heading:/^ *(#{1,6}) *([^\n]+?) *#* *(?:\n+|$)/,nptable:noop,blockquote:/^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,list:/^( *)(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?!\1bull )\n*|\s*$)/,html:/^ *(?:comment *(?:\n|\s*$)|closed *(?:\n{2,}|\s*$)|closing *(?:\n{2,}|\s*$))/,def:/^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,table:noop,lheading:/^([^\n]+)\n *(=|-){2,} *(?:\n+|$)/,paragraph:/^([^\n]+(?:\n?(?!hr|heading|lheading| {0,3}>|tag)[^\n]+)+)/,text:/^[^\n]+/,_label:/(?:\\[\[\]]|[^\[\]])+/,_title:/(?:"(?:\\"|[^"]|"[^"\n]*")*"|'\n?(?:[^'\n]+\n?)*'|\([^()]*\))/};block.def=edit(block.def).replace("label",block._label).replace("title",block._title).getRegex();block.bullet=/(?:[*+-]|\d+\.)/;block.item=/^( *)(bull) [^\n]*(?:\n(?!\1bull )[^\n]*)*/;block.item=edit(block.item,"gm").replace(/bull/g,block.bullet).getRegex();block.list=edit(block.list).replace(/bull/g,block.bullet).replace("hr","\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))").replace("def","\\n+(?="+block.def.source+")").getRegex();block._tag="(?!(?:"+"a|em|strong|small|s|cite|q|dfn|abbr|data|time|code"+"|var|samp|kbd|sub|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo"+"|span|br|wbr|ins|del|img)\\b)\\w+(?!:|[^\\w\\s@]*@)\\b";block.html=edit(block.html).replace("comment",/\x3c!--[\s\S]*?--\x3e/).replace("closed",/<(tag)[\s\S]+?<\/\1>/).replace("closing",/<tag(?:"[^"]*"|'[^']*'|\s[^'"\/>\s]*)*?\/?>/).replace(/tag/g,block._tag).getRegex();block.paragraph=edit(block.paragraph).replace("hr",block.hr).replace("heading",block.heading).replace("lheading",block.lheading).replace("tag","<"+block._tag).getRegex();block.blockquote=edit(block.blockquote).replace("paragraph",block.paragraph).getRegex();/**
  * Normal Block Grammar
@@ -7214,7 +7214,7 @@
  * Expose
  */marked.Parser=Parser;marked.parser=Parser.parse;marked.Renderer=Renderer;marked.TextRenderer=TextRenderer;marked.Lexer=Lexer;marked.lexer=Lexer.lex;marked.InlineLexer=InlineLexer;marked.inlineLexer=InlineLexer.output;marked.parse=marked;if("undefined"!==typeof module&&"object"===("undefined"===typeof exports?"undefined":babelHelpers.typeof(exports))){module.exports=marked}else if("function"===typeof define&&define.amd){define(function(){return marked})}else{root.marked=marked}})(this||("undefined"!==typeof window?window:global));</script><script>if(!window.marked){// For webpack support for the Polymer 3 version created by the Polymer Modulizer
 // More info: https://github.com/PolymerElements/marked-element/issues/81
-window.marked=require("../../marked/lib/marked.js")}</script><dom-module id="marked-element" assetpath="../marked-element/"><template><style>:host{display:block;}</style><slot name="markdown-html"><div id="content"></div></slot></template></dom-module><script>'use strict';Polymer({is:"marked-element",properties:{/**
+window.marked=require("../../marked/lib/marked.js")}</script><dom-module id="marked-element" assetpath="../marked-element/"><template><style>:host{display:block;}</style><slot name="markdown-html"><div id="content"></div></slot></template></dom-module><script>"use strict";Polymer({is:"marked-element",properties:{/**
        * The markdown source that should be rendered by this element.
        */markdown:{type:String,value:null},/**
        * Enable GFM line breaks (regular newlines instead of two spaces for breaks)
@@ -7316,29 +7316,7 @@
 :{}// if in node js
 ,Prism=function(_self){// Private helper vars
 var lang=/\blang(?:uage)?-([\w-]+)\b/i,uniqueId=0,_={manual:_self.Prism&&_self.Prism.manual,disableWorkerMessageHandler:_self.Prism&&_self.Prism.disableWorkerMessageHandler,util:{encode:function encode(tokens){if(babelHelpers.instanceof(tokens,Token)){return new Token(tokens.type,_.util.encode(tokens.content),tokens.alias)}else if(Array.isArray(tokens)){return tokens.map(_.util.encode)}else{return tokens.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/\u00a0/g," ")}},type:function type(o){return Object.prototype.toString.call(o).slice(8,-1)},objId:function objId(obj){if(!obj.__id){Object.defineProperty(obj,"__id",{value:++uniqueId})}return obj.__id},// Deep clone a language definition (e.g. to extend it)
-clone:function deepClone(o,visited){var clone,id,type=_.util.type(o);visited=visited||{};switch(type){case"Object":id=_.util.objId(o);if(visited[id]){return visited[id]}clone={};visited[id]=clone;for(var key in o){if(o.hasOwnProperty(key)){clone[key]=deepClone(o[key],visited)}}return clone;case"Array":id=_.util.objId(o);if(visited[id]){return visited[id]}clone=[];visited[id]=clone;o.forEach(function(v,i){clone[i]=deepClone(v,visited)});return clone;default:return o;}},/**
-		 * Returns the Prism language of the given element set by a `language-xxxx` or `lang-xxxx` class.
-		 *
-		 * If no language is set for the element or the element is `null` or `undefined`, `none` will be returned.
-		 *
-		 * @param {Element} element
-		 * @returns {string}
-		 */getLanguage:function getLanguage(element){while(element&&!lang.test(element.className)){element=element.parentElement}if(element){return(element.className.match(lang)||[,"none"])[1].toLowerCase()}return"none"},/**
-		 * Returns the script element that is currently executing.
-		 *
-		 * This does __not__ work for line script element.
-		 *
-		 * @returns {HTMLScriptElement | null}
-		 */currentScript:function currentScript(){if("undefined"===typeof document){return null}if("currentScript"in document){return document.currentScript}// IE11 workaround
-// we'll get the src of the current script by parsing IE11's error stack trace
-// this will not work for inline scripts
-try{throw new Error}catch(err){// Get file src url from stack. Specifically works with the format of stack traces in IE.
-// A stack will look like this:
-//
-// Error
-//    at _.util.currentScript (http://localhost/components/prism-core.js:119:5)
-//    at Global code (http://localhost/components/prism-core.js:606:1)
-var src=(/at [^(\r\n]*\((.*):.+:.+\)$/i.exec(err.stack)||[])[1];if(src){var scripts=document.getElementsByTagName("script");for(var i in scripts){if(scripts[i].src==src){return scripts[i]}}}return null}}},languages:{extend:function extend(id,redef){var lang=_.util.clone(_.languages[id]);for(var key in redef){lang[key]=redef[key]}return lang},/**
+clone:function deepClone(o,visited){var clone,id,type=_.util.type(o);visited=visited||{};switch(type){case"Object":id=_.util.objId(o);if(visited[id]){return visited[id]}clone={};visited[id]=clone;for(var key in o){if(o.hasOwnProperty(key)){clone[key]=deepClone(o[key],visited)}}return clone;case"Array":id=_.util.objId(o);if(visited[id]){return visited[id]}clone=[];visited[id]=clone;o.forEach(function(v,i){clone[i]=deepClone(v,visited)});return clone;default:return o;}}},languages:{extend:function extend(id,redef){var lang=_.util.clone(_.languages[id]);for(var key in redef){lang[key]=redef[key]}return lang},/**
 		 * Insert a token before another token in a language literal
 		 * As this needs to recreate the object (we cannot actually insert before keys in object literals),
 		 * we cannot just provide an object, we need an object and a key.
@@ -7349,33 +7327,27 @@
 		 */insertBefore:function insertBefore(inside,before,insert,root){root=root||_.languages;var grammar=root[inside],ret={};for(var token in grammar){if(grammar.hasOwnProperty(token)){if(token==before){for(var newToken in insert){if(insert.hasOwnProperty(newToken)){ret[newToken]=insert[newToken]}}}// Do not insert token which also occur in insert. See #1525
 if(!insert.hasOwnProperty(token)){ret[token]=grammar[token]}}}var old=root[inside];root[inside]=ret;// Update references in other language definitions
 _.languages.DFS(_.languages,function(key,value){if(value===old&&key!=inside){this[key]=ret}});return ret},// Traverse a language definition with Depth First Search
-DFS:function DFS(o,callback,type,visited){visited=visited||{};var objId=_.util.objId;for(var i in o){if(o.hasOwnProperty(i)){callback.call(o,i,o[i],type||i);var property=o[i],propertyType=_.util.type(property);if("Object"===propertyType&&!visited[objId(property)]){visited[objId(property)]=!0;DFS(property,callback,null,visited)}else if("Array"===propertyType&&!visited[objId(property)]){visited[objId(property)]=!0;DFS(property,callback,i,visited)}}}}},plugins:{},highlightAll:function highlightAll(async,callback){_.highlightAllUnder(document,async,callback)},highlightAllUnder:function highlightAllUnder(container,async,callback){var env={callback:callback,container:container,selector:"code[class*=\"language-\"], [class*=\"language-\"] code, code[class*=\"lang-\"], [class*=\"lang-\"] code"};_.hooks.run("before-highlightall",env);env.elements=Array.prototype.slice.apply(env.container.querySelectorAll(env.selector));_.hooks.run("before-all-elements-highlight",env);for(var i=0,element;element=env.elements[i++];){_.highlightElement(element,!0===async,env.callback)}},highlightElement:function highlightElement(element,async,callback){// Find language
-var language=_.util.getLanguage(element),grammar=_.languages[language];// Set language on the element, if not present
-element.className=element.className.replace(lang,"").replace(/\s+/g," ")+" language-"+language;// Set language on the parent, for styling
-var parent=element.parentNode;if(parent&&"pre"===parent.nodeName.toLowerCase()){parent.className=parent.className.replace(lang,"").replace(/\s+/g," ")+" language-"+language}var code=element.textContent,env={element:element,language:language,grammar:grammar,code:code};function insertHighlightedCode(highlightedCode){env.highlightedCode=highlightedCode;_.hooks.run("before-insert",env);env.element.innerHTML=env.highlightedCode;_.hooks.run("after-highlight",env);_.hooks.run("complete",env);callback&&callback.call(env.element)}_.hooks.run("before-sanity-check",env);if(!env.code){_.hooks.run("complete",env);callback&&callback.call(env.element);return}_.hooks.run("before-highlight",env);if(!env.grammar){insertHighlightedCode(_.util.encode(env.code));return}if(async&&_self.Worker){var worker=new Worker(_.filename);worker.onmessage=function(evt){insertHighlightedCode(evt.data)};worker.postMessage(JSON.stringify({language:env.language,code:env.code,immediateClose:!0}))}else{insertHighlightedCode(_.highlight(env.code,env.grammar,env.language))}},highlight:function highlight(text,grammar,language){var env={code:text,grammar:grammar,language:language};_.hooks.run("before-tokenize",env);env.tokens=_.tokenize(env.code,env.grammar);_.hooks.run("after-tokenize",env);return Token.stringify(_.util.encode(env.tokens),env.language)},matchGrammar:function matchGrammar(text,strarr,grammar,index,startPos,oneshot,target){for(var token in grammar){if(!grammar.hasOwnProperty(token)||!grammar[token]){continue}var patterns=grammar[token];patterns=Array.isArray(patterns)?patterns:[patterns];for(var j=0;j<patterns.length;++j){if(target&&target==token+","+j){return}var pattern=patterns[j],inside=pattern.inside,lookbehind=!!pattern.lookbehind,greedy=!!pattern.greedy,lookbehindLength=0,alias=pattern.alias;if(greedy&&!pattern.pattern.global){// Without the global flag, lastIndex won't work
-var flags=pattern.pattern.toString().match(/[imsuy]*$/)[0];pattern.pattern=RegExp(pattern.pattern.source,flags+"g")}pattern=pattern.pattern||pattern;// Don’t cache length as it changes during the loop
+DFS:function DFS(o,callback,type,visited){visited=visited||{};var objId=_.util.objId;for(var i in o){if(o.hasOwnProperty(i)){callback.call(o,i,o[i],type||i);var property=o[i],propertyType=_.util.type(property);if("Object"===propertyType&&!visited[objId(property)]){visited[objId(property)]=!0;DFS(property,callback,null,visited)}else if("Array"===propertyType&&!visited[objId(property)]){visited[objId(property)]=!0;DFS(property,callback,i,visited)}}}}},plugins:{},highlightAll:function highlightAll(async,callback){_.highlightAllUnder(document,async,callback)},highlightAllUnder:function highlightAllUnder(container,async,callback){var env={callback:callback,selector:"code[class*=\"language-\"], [class*=\"language-\"] code, code[class*=\"lang-\"], [class*=\"lang-\"] code"};_.hooks.run("before-highlightall",env);for(var elements=container.querySelectorAll(env.selector),i=0,element;element=elements[i++];){_.highlightElement(element,!0===async,env.callback)}},highlightElement:function highlightElement(element,async,callback){// Find language
+var language="none",grammar,parent=element;while(parent&&!lang.test(parent.className)){parent=parent.parentNode}if(parent){language=(parent.className.match(lang)||[,"none"])[1].toLowerCase();grammar=_.languages[language]}// Set language on the element, if not present
+element.className=element.className.replace(lang,"").replace(/\s+/g," ")+" language-"+language;if(element.parentNode){// Set language on the parent, for styling
+parent=element.parentNode;if(/pre/i.test(parent.nodeName)){parent.className=parent.className.replace(lang,"").replace(/\s+/g," ")+" language-"+language}}var code=element.textContent,env={element:element,language:language,grammar:grammar,code:code},insertHighlightedCode=function insertHighlightedCode(highlightedCode){env.highlightedCode=highlightedCode;_.hooks.run("before-insert",env);env.element.innerHTML=env.highlightedCode;_.hooks.run("after-highlight",env);_.hooks.run("complete",env);callback&&callback.call(env.element)};_.hooks.run("before-sanity-check",env);if(!env.code){_.hooks.run("complete",env);return}_.hooks.run("before-highlight",env);if(!env.grammar){insertHighlightedCode(_.util.encode(env.code));return}if(async&&_self.Worker){var worker=new Worker(_.filename);worker.onmessage=function(evt){insertHighlightedCode(evt.data)};worker.postMessage(JSON.stringify({language:env.language,code:env.code,immediateClose:!0}))}else{insertHighlightedCode(_.highlight(env.code,env.grammar,env.language))}},highlight:function highlight(text,grammar,language){var env={code:text,grammar:grammar,language:language};_.hooks.run("before-tokenize",env);env.tokens=_.tokenize(env.code,env.grammar);_.hooks.run("after-tokenize",env);return Token.stringify(_.util.encode(env.tokens),env.language)},matchGrammar:function matchGrammar(text,strarr,grammar,index,startPos,oneshot,target){for(var token in grammar){if(!grammar.hasOwnProperty(token)||!grammar[token]){continue}if(token==target){return}var patterns=grammar[token];patterns="Array"===_.util.type(patterns)?patterns:[patterns];for(var j=0;j<patterns.length;++j){var pattern=patterns[j],inside=pattern.inside,lookbehind=!!pattern.lookbehind,greedy=!!pattern.greedy,lookbehindLength=0,alias=pattern.alias;if(greedy&&!pattern.pattern.global){// Without the global flag, lastIndex won't work
+var flags=pattern.pattern.toString().match(/[imuy]*$/)[0];pattern.pattern=RegExp(pattern.pattern.source,flags+"g")}pattern=pattern.pattern||pattern;// Don’t cache length as it changes during the loop
 for(var i=index,pos=startPos,str;i<strarr.length;pos+=strarr[i].length,++i){str=strarr[i];if(strarr.length>text.length){// Something went terribly wrong, ABORT, ABORT!
-return}if(babelHelpers.instanceof(str,Token)){continue}if(greedy&&i!=strarr.length-1){pattern.lastIndex=pos;var match=pattern.exec(text);if(!match){break}for(var from=match.index+(lookbehind&&match[1]?match[1].length:0),to=match.index+match[0].length,k=i,p=pos,len=strarr.length;k<len&&(p<to||!strarr[k].type&&!strarr[k-1].greedy);++k){p+=strarr[k].length;// Move the index i to the element in strarr that is closest to from
+return}if(babelHelpers.instanceof(str,Token)){continue}if(greedy&&i!=strarr.length-1){pattern.lastIndex=pos;var match=pattern.exec(text);if(!match){break}for(var from=match.index+(lookbehind?match[1].length:0),to=match.index+match[0].length,k=i,p=pos,len=strarr.length;k<len&&(p<to||!strarr[k].type&&!strarr[k-1].greedy);++k){p+=strarr[k].length;// Move the index i to the element in strarr that is closest to from
 if(from>=p){++i;pos=p}}// If strarr[i] is a Token, then the match starts inside another Token, which is invalid
 if(babelHelpers.instanceof(strarr[i],Token)){continue}// Number of tokens to delete and replace with the new match
-delNum=k-i;str=text.slice(pos,p);match.index-=pos}else{pattern.lastIndex=0;var match=pattern.exec(str),delNum=1}if(!match){if(oneshot){break}continue}if(lookbehind){lookbehindLength=match[1]?match[1].length:0}var from=match.index+lookbehindLength,match=match[0].slice(lookbehindLength),to=from+match.length,before=str.slice(0,from),after=str.slice(to),args=[i,delNum];if(before){++i;pos+=before.length;args.push(before)}var wrapped=new Token(token,inside?_.tokenize(match,inside):match,alias,match,greedy);args.push(wrapped);if(after){args.push(after)}Array.prototype.splice.apply(strarr,args);if(1!=delNum)_.matchGrammar(text,strarr,grammar,i,pos,!0,token+","+j);if(oneshot)break}}}},tokenize:function tokenize(text,grammar){var strarr=[text],rest=grammar.rest;if(rest){for(var token in rest){grammar[token]=rest[token]}delete grammar.rest}_.matchGrammar(text,strarr,grammar,0,0,!1);return strarr},hooks:{all:{},add:function add(name,callback){var hooks=_.hooks.all;hooks[name]=hooks[name]||[];hooks[name].push(callback)},run:function run(name,env){var callbacks=_.hooks.all[name];if(!callbacks||!callbacks.length){return}for(var i=0,callback;callback=callbacks[i++];){callback(env)}}},Token:Token};_self.Prism=_;function Token(type,content,alias,matchedStr,greedy){this.type=type;this.content=content;this.alias=alias;// Copy of the full string this token was created from
+delNum=k-i;str=text.slice(pos,p);match.index-=pos}else{pattern.lastIndex=0;var match=pattern.exec(str),delNum=1}if(!match){if(oneshot){break}continue}if(lookbehind){lookbehindLength=match[1]?match[1].length:0}var from=match.index+lookbehindLength,match=match[0].slice(lookbehindLength),to=from+match.length,before=str.slice(0,from),after=str.slice(to),args=[i,delNum];if(before){++i;pos+=before.length;args.push(before)}var wrapped=new Token(token,inside?_.tokenize(match,inside):match,alias,match,greedy);args.push(wrapped);if(after){args.push(after)}Array.prototype.splice.apply(strarr,args);if(1!=delNum)_.matchGrammar(text,strarr,grammar,i,pos,!0,token);if(oneshot)break}}}},tokenize:function tokenize(text,grammar){var strarr=[text],rest=grammar.rest;if(rest){for(var token in rest){grammar[token]=rest[token]}delete grammar.rest}_.matchGrammar(text,strarr,grammar,0,0,!1);return strarr},hooks:{all:{},add:function add(name,callback){var hooks=_.hooks.all;hooks[name]=hooks[name]||[];hooks[name].push(callback)},run:function run(name,env){var callbacks=_.hooks.all[name];if(!callbacks||!callbacks.length){return}for(var i=0,callback;callback=callbacks[i++];){callback(env)}}},Token:Token};_self.Prism=_;function Token(type,content,alias,matchedStr,greedy){this.type=type;this.content=content;this.alias=alias;// Copy of the full string this token was created from
 this.length=0|(matchedStr||"").length;this.greedy=!!greedy}Token.stringify=function(o,language){if("string"==typeof o){return o}if(Array.isArray(o)){return o.map(function(element){return Token.stringify(element,language)}).join("")}var env={type:o.type,content:Token.stringify(o.content,language),tag:"span",classes:["token",o.type],attributes:{},language:language};if(o.alias){var aliases=Array.isArray(o.alias)?o.alias:[o.alias];Array.prototype.push.apply(env.classes,aliases)}_.hooks.run("wrap",env);var attributes=Object.keys(env.attributes).map(function(name){return name+"=\""+(env.attributes[name]||"").replace(/"/g,"&quot;")+"\""}).join(" ");return"<"+env.tag+" class=\""+env.classes.join(" ")+"\""+(attributes?" "+attributes:"")+">"+env.content+"</"+env.tag+">"};if(!_self.document){if(!_self.addEventListener){// in Node.js
 return _}if(!_.disableWorkerMessageHandler){// In worker
 _self.addEventListener("message",function(evt){var message=JSON.parse(evt.data),lang=message.language,code=message.code,immediateClose=message.immediateClose;_self.postMessage(_.highlight(code,_.languages[lang],lang));if(immediateClose){_self.close()}},!1)}return _}//Get current script and highlight
-var script=_.util.currentScript();if(script){_.filename=script.src;if(script.hasAttribute("data-manual")){_.manual=!0}}if(!_.manual){var highlightAutomaticallyCallback=function highlightAutomaticallyCallback(){if(!_.manual){_.highlightAll()}},readyState=document.readyState;// If the document state is "loading", then we'll use DOMContentLoaded.
-// If the document state is "interactive" and the prism.js script is deferred, then we'll also use the
-// DOMContentLoaded event because there might be some plugins or languages which have also been deferred and they
-// might take longer one animation frame to execute which can create a race condition where only some plugins have
-// been loaded when Prism.highlightAll() is executed, depending on how fast resources are loaded.
-// See https://github.com/PrismJS/prism/issues/2102
-if("loading"===readyState||"interactive"===readyState&&script&&script.defer){document.addEventListener("DOMContentLoaded",highlightAutomaticallyCallback)}else{if(window.requestAnimationFrame){window.requestAnimationFrame(highlightAutomaticallyCallback)}else{window.setTimeout(highlightAutomaticallyCallback,16)}}}return _}(_self);/**
+var script=document.currentScript||[].slice.call(document.getElementsByTagName("script")).pop();if(script){_.filename=script.src;if(!_.manual&&!script.hasAttribute("data-manual")){if("loading"!==document.readyState){if(window.requestAnimationFrame){window.requestAnimationFrame(_.highlightAll)}else{window.setTimeout(_.highlightAll,16)}}else{document.addEventListener("DOMContentLoaded",_.highlightAll)}}}return _}(_self);/**
  * Prism: Lightweight, robust, elegant syntax highlighting
  * MIT license http://www.opensource.org/licenses/mit-license.php/
  * @author Lea Verou http://lea.verou.me
  */if("undefined"!==typeof module&&module.exports){module.exports=Prism}// hack for components to work correctly in node.js
 if("undefined"!==typeof global){global.Prism=Prism}/* **********************************************
      Begin prism-markup.js
-********************************************** */Prism.languages.markup={comment:/\x3c!--[\s\S]*?--\x3e/,prolog:/<\?[\s\S]+?\?>/,doctype:{pattern:/<!DOCTYPE(?:[^>"'[\]]|"[^"]*"|'[^']*')+(?:\[(?:(?!\x3c!--)[^"'\]]|"[^"]*"|'[^']*'|\x3c!--[\s\S]*?--\x3e)*\]\s*)?>/i,greedy:!0},cdata:/<!\[CDATA\[[\s\S]*?]]>/i,tag:{pattern:/<\/?(?!\d)[^\s>\/=$<%]+(?:\s(?:\s*[^\s>\/=]+(?:\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+(?=[\s>]))|(?=[\s/>])))+)?\s*\/?>/i,greedy:!0,inside:{tag:{pattern:/^<\/?[^\s>\/]+/i,inside:{punctuation:/^<\/?/,namespace:/^[^\s>\/:]+:/}},"attr-value":{pattern:/=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+)/i,inside:{punctuation:[/^=/,{pattern:/^(\s*)["']|["']$/,lookbehind:!0}]}},punctuation:/\/?>/,"attr-name":{pattern:/[^\s>\/]+/,inside:{namespace:/^[^\s>\/:]+:/}}}},entity:/&#?[\da-z]{1,8};/i};Prism.languages.markup.tag.inside["attr-value"].inside.entity=Prism.languages.markup.entity;// Plugin to make entity title show the real entity, idea by Roman Komarov
+********************************************** */Prism.languages.markup={comment:/\x3c!--[\s\S]*?--\x3e/,prolog:/<\?[\s\S]+?\?>/,doctype:/<!DOCTYPE[\s\S]+?>/i,cdata:/<!\[CDATA\[[\s\S]*?]]>/i,tag:{pattern:/<\/?(?!\d)[^\s>\/=$<%]+(?:\s(?:\s*[^\s>\/=]+(?:\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+(?=[\s>]))|(?=[\s/>])))+)?\s*\/?>/i,greedy:!0,inside:{tag:{pattern:/^<\/?[^\s>\/]+/i,inside:{punctuation:/^<\/?/,namespace:/^[^\s>\/:]+:/}},"attr-value":{pattern:/=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+)/i,inside:{punctuation:[/^=/,{pattern:/^(\s*)["']|["']$/,lookbehind:!0}]}},punctuation:/\/?>/,"attr-name":{pattern:/[^\s>\/]+/,inside:{namespace:/^[^\s>\/:]+:/}}}},entity:/&#?[\da-z]{1,8};/i};Prism.languages.markup.tag.inside["attr-value"].inside.entity=Prism.languages.markup.entity;// Plugin to make entity title show the real entity, idea by Roman Komarov
 Prism.hooks.add("wrap",function(env){if("entity"===env.type){env.attributes.title=env.content.replace(/&amp;/,"&")}});Object.defineProperty(Prism.languages.markup.tag,"addInlined",{/**
 	 * Adds an inlined language to markup.
 	 *
@@ -7391,10 +7363,10 @@
 ********************************************** */(function(Prism){var string=/("|')(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/;Prism.languages.css={comment:/\/\*[\s\S]*?\*\//,atrule:{pattern:/@[\w-]+[\s\S]*?(?:;|(?=\s*\{))/,inside:{rule:/@[\w-]+/ // See rest below
 }},url:{pattern:RegExp("url\\((?:"+string.source+"|[^\n\r()]*)\\)","i"),inside:{function:/^url/i,punctuation:/^\(|\)$/}},selector:RegExp("[^{}\\s](?:[^{};\"']|"+string.source+")*?(?=\\s*\\{)"),string:{pattern:string,greedy:!0},property:/[-_a-z\xA0-\uFFFF][-\w\xA0-\uFFFF]*(?=\s*:)/i,important:/!important\b/i,function:/[-a-z0-9]+(?=\()/i,punctuation:/[(){};:,]/};Prism.languages.css.atrule.inside.rest=Prism.languages.css;var markup=Prism.languages.markup;if(markup){markup.tag.addInlined("style","css");Prism.languages.insertBefore("inside","attr-value",{"style-attr":{pattern:/\s*style=("|')(?:\\[\s\S]|(?!\1)[^\\])*\1/i,inside:{"attr-name":{pattern:/^\s*style/i,inside:markup.tag.inside},punctuation:/^\s*=\s*['"]|['"]\s*$/,"attr-value":{pattern:/.+/i,inside:Prism.languages.css}},alias:"language-css"}},markup.tag)}})(Prism);/* **********************************************
      Begin prism-clike.js
-********************************************** */Prism.languages.clike={comment:[{pattern:/(^|[^\\])\/\*[\s\S]*?(?:\*\/|$)/,lookbehind:!0},{pattern:/(^|[^\\:])\/\/.*/,lookbehind:!0,greedy:!0}],string:{pattern:/(["'])(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,greedy:!0},"class-name":{pattern:/(\b(?:class|interface|extends|implements|trait|instanceof|new)\s+|\bcatch\s+\()[\w.\\]+/i,lookbehind:!0,inside:{punctuation:/[.\\]/}},keyword:/\b(?:if|else|while|do|for|return|in|instanceof|function|new|try|throw|catch|finally|null|break|continue)\b/,boolean:/\b(?:true|false)\b/,function:/\w+(?=\()/,number:/\b0x[\da-f]+\b|(?:\b\d+\.?\d*|\B\.\d+)(?:e[+-]?\d+)?/i,operator:/[<>]=?|[!=]=?=?|--?|\+\+?|&&?|\|\|?|[?*/~^%]/,punctuation:/[{}[\];(),.:]/};/* **********************************************
+********************************************** */Prism.languages.clike={comment:[{pattern:/(^|[^\\])\/\*[\s\S]*?(?:\*\/|$)/,lookbehind:!0},{pattern:/(^|[^\\:])\/\/.*/,lookbehind:!0,greedy:!0}],string:{pattern:/(["'])(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,greedy:!0},"class-name":{pattern:/((?:\b(?:class|interface|extends|implements|trait|instanceof|new)\s+)|(?:catch\s+\())[\w.\\]+/i,lookbehind:!0,inside:{punctuation:/[.\\]/}},keyword:/\b(?:if|else|while|do|for|return|in|instanceof|function|new|try|throw|catch|finally|null|break|continue)\b/,boolean:/\b(?:true|false)\b/,function:/\w+(?=\()/,number:/\b0x[\da-f]+\b|(?:\b\d+\.?\d*|\B\.\d+)(?:e[+-]?\d+)?/i,operator:/--?|\+\+?|!=?=?|<=?|>=?|==?=?|&&?|\|\|?|\?|\*|\/|~|\^|%/,punctuation:/[{}[\];(),.:]/};/* **********************************************
      Begin prism-javascript.js
 ********************************************** */Prism.languages.javascript=Prism.languages.extend("clike",{"class-name":[Prism.languages.clike["class-name"],{pattern:/(^|[^$\w\xA0-\uFFFF])[_$A-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\.(?:prototype|constructor))/,lookbehind:!0}],keyword:[{pattern:/((?:^|})\s*)(?:catch|finally)\b/,lookbehind:!0},{pattern:/(^|[^.])\b(?:as|async(?=\s*(?:function\b|\(|[$\w\xA0-\uFFFF]|$))|await|break|case|class|const|continue|debugger|default|delete|do|else|enum|export|extends|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|undefined|var|void|while|with|yield)\b/,lookbehind:!0}],number:/\b(?:(?:0[xX](?:[\dA-Fa-f](?:_[\dA-Fa-f])?)+|0[bB](?:[01](?:_[01])?)+|0[oO](?:[0-7](?:_[0-7])?)+)n?|(?:\d(?:_\d)?)+n|NaN|Infinity)\b|(?:\b(?:\d(?:_\d)?)+\.?(?:\d(?:_\d)?)*|\B\.(?:\d(?:_\d)?)+)(?:[Ee][+-]?(?:\d(?:_\d)?)+)?/,// Allow for all non-ASCII characters (See http://stackoverflow.com/a/2008444)
-function:/#?[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*(?:\.\s*(?:apply|bind|call)\s*)?\()/,operator:/--|\+\+|\*\*=?|=>|&&|\|\||[!=]==|<<=?|>>>?=?|[-+*/%&|^!=<>]=?|\.{3}|\?[.?]?|[~:]/});Prism.languages.javascript["class-name"][0].pattern=/(\b(?:class|interface|extends|implements|instanceof|new)\s+)[\w.\\]+/;Prism.languages.insertBefore("javascript","keyword",{regex:{pattern:/((?:^|[^$\w\xA0-\uFFFF."'\])\s])\s*)\/(?:\[(?:[^\]\\\r\n]|\\.)*]|\\.|[^/\\\[\r\n])+\/[gimyus]{0,6}(?=\s*(?:$|[\r\n,.;})\]]))/,lookbehind:!0,greedy:!0},// This must be declared before keyword because we use "function" inside the look-forward
+function:/#?[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*(?:\.\s*(?:apply|bind|call)\s*)?\()/,operator:/-[-=]?|\+[+=]?|!=?=?|<<?=?|>>?>?=?|=(?:==?|>)?|&[&=]?|\|[|=]?|\*\*?=?|\/=?|~|\^=?|%=?|\?|\.{3}/});Prism.languages.javascript["class-name"][0].pattern=/(\b(?:class|interface|extends|implements|instanceof|new)\s+)[\w.\\]+/;Prism.languages.insertBefore("javascript","keyword",{regex:{pattern:/((?:^|[^$\w\xA0-\uFFFF."'\])\s])\s*)\/(\[(?:[^\]\\\r\n]|\\.)*]|\\.|[^/\\\[\r\n])+\/[gimyus]{0,6}(?=\s*($|[\r\n,.;})\]]))/,lookbehind:!0,greedy:!0},// This must be declared before keyword because we use "function" inside the look-forward
 "function-variable":{pattern:/#?[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*[=:]\s*(?:async\s*)?(?:\bfunction\b|(?:\((?:[^()]|\([^()]*\))*\)|[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)\s*=>))/,alias:"function"},parameter:[{pattern:/(function(?:\s+[_$A-Za-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)?\s*\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\))/,lookbehind:!0,inside:Prism.languages.javascript},{pattern:/[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*=>)/i,inside:Prism.languages.javascript},{pattern:/(\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\)\s*=>)/,lookbehind:!0,inside:Prism.languages.javascript},{pattern:/((?:\b|\s|^)(?!(?:as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|undefined|var|void|while|with|yield)(?![$\w\xA0-\uFFFF]))(?:[_$A-Za-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*\s*)\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\)\s*\{)/,lookbehind:!0,inside:Prism.languages.javascript}],constant:/\b[A-Z](?:[A-Z_]|\dx?)*\b/});Prism.languages.insertBefore("javascript","string",{"template-string":{pattern:/`(?:\\[\s\S]|\${(?:[^{}]|{(?:[^{}]|{[^}]*})*})+}|(?!\${)[^\\`])*`/,greedy:!0,inside:{"template-punctuation":{pattern:/^`|`$/,alias:"string"},interpolation:{pattern:/((?:^|[^\\])(?:\\{2})*)\${(?:[^{}]|{(?:[^{}]|{[^}]*})*})+}/,lookbehind:!0,inside:{"interpolation-punctuation":{pattern:/^\${|}$/,alias:"punctuation"},rest:Prism.languages.javascript}},string:/[\s\S]+/}}});if(Prism.languages.markup){Prism.languages.markup.tag.addInlined("script","javascript")}Prism.languages.js=Prism.languages.javascript;/* **********************************************
      Begin prism-file-highlight.js
 ********************************************** */(function(){if("undefined"===typeof self||!self.Prism||!self.document||!document.querySelector){return}/**
@@ -7402,7 +7374,7 @@
 	 */self.Prism.fileHighlight=function(container){container=container||document;var Extensions={js:"javascript",py:"python",rb:"ruby",ps1:"powershell",psm1:"powershell",sh:"bash",bat:"batch",h:"c",tex:"latex"};Array.prototype.slice.call(container.querySelectorAll("pre[data-src]")).forEach(function(pre){// ignore if already loaded
 if(pre.hasAttribute("data-src-loaded")){return}// load current
 var src=pre.getAttribute("data-src"),language,parent=pre,lang=/\blang(?:uage)?-([\w-]+)\b/i;while(parent&&!lang.test(parent.className)){parent=parent.parentNode}if(parent){language=(pre.className.match(lang)||[,""])[1]}if(!language){var extension=(src.match(/\.(\w+)$/)||[,""])[1];language=Extensions[extension]||extension}var code=document.createElement("code");code.className="language-"+language;pre.textContent="";code.textContent="Loading\u2026";pre.appendChild(code);var xhr=new XMLHttpRequest;xhr.open("GET",src,!0);xhr.onreadystatechange=function(){if(4==xhr.readyState){if(400>xhr.status&&xhr.responseText){code.textContent=xhr.responseText;Prism.highlightElement(code);// mark as loaded
-pre.setAttribute("data-src-loaded","")}else if(400<=xhr.status){code.textContent="\u2716 Error "+xhr.status+" while fetching file: "+xhr.statusText}else{code.textContent="\u2716 Error: File does not exist or is empty"}}};xhr.send(null)})};document.addEventListener("DOMContentLoaded",function(){// execute inside handler, for dropping Event as argument
+pre.setAttribute("data-src-loaded","")}else if(400<=xhr.status){code.textContent="\u2716 Error "+xhr.status+" while fetching file: "+xhr.statusText}else{code.textContent="\u2716 Error: File does not exist or is empty"}}};xhr.send(null)});if(Prism.plugins.toolbar){Prism.plugins.toolbar.registerButton("download-file",function(env){var pre=env.element.parentNode;if(!pre||!/pre/i.test(pre.nodeName)||!pre.hasAttribute("data-src")||!pre.hasAttribute("data-download-link")){return}var src=pre.getAttribute("data-src"),a=document.createElement("a");a.textContent=pre.getAttribute("data-download-link-label")||"Download";a.setAttribute("download","");a.href=src;return a})}};document.addEventListener("DOMContentLoaded",function(){// execute inside handler, for dropping Event as argument
 self.Prism.fileHighlight()})})();</script><style>code[class*="language-"],
 pre[class*="language-"]{color:black;background:none;text-shadow:0 1px white;font-family:Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;font-size:1em;text-align:left;white-space:pre;word-spacing:normal;word-break:normal;word-wrap:normal;line-height:1.5;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-hyphens:none;-moz-hyphens:none;-ms-hyphens:none;hyphens:none;}pre[class*="language-"]::-moz-selection, pre[class*="language-"] ::-moz-selection,
 code[class*="language-"]::-moz-selection, code[class*="language-"] ::-moz-selection{text-shadow:none;background:#b3d4fc;}pre[class*="language-"]::selection, pre[class*="language-"] ::selection,
@@ -7432,7 +7404,7 @@
 .token.class-name{color:#DD4A68;}.token.regex,
 .token.important,
 .token.variable{color:#e90;}.token.important,
-.token.bold{font-weight:bold;}.token.italic{font-style:italic;}.token.entity{cursor:help;}</style><script>(function(){'use strict';var HIGHLIGHT_EVENT="syntax-highlight";Polymer({is:"prism-highlighter",properties:{/**
+.token.bold{font-weight:bold;}.token.italic{font-style:italic;}.token.entity{cursor:help;}</style><script>(function(){"use strict";var HIGHLIGHT_EVENT="syntax-highlight";Polymer({is:"prism-highlighter",properties:{/**
        * Adds languages outside of the core Prism languages.
        *
        * Prism includes a few languages in the core library:
@@ -7734,7 +7706,7 @@
 // https://crbug.com/370136
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       .wave{opacity:0;}#waves,
       .wave{overflow:hidden;}.wave-container,
       .wave{border-radius:50%;}:host(.circle) #background,
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+      :host(.circle) #waves{border-radius:50%;}:host(.circle) .wave-container{overflow:hidden;}</style><div id="background"></div><div id="waves"></div></template></dom-module><script>(function(){"use strict";var Utility={distance:function distance(x1,y1,x2,y2){var xDelta=x1-x2,yDelta=y1-y2;return Math.sqrt(xDelta*xDelta+yDelta*yDelta)},now:window.performance&&window.performance.now?window.performance.now.bind(window.performance):Date.now};/**
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@@ -8051,7 +8023,7 @@
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          */alt:{type:String,observer:"_altChanged"}},_altChanged:function _altChanged(newValue,oldValue){var label=this.getAttribute("aria-label");// Don't stomp over a user-set aria-label.
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+if(!label||oldValue==label){this.setAttribute("aria-label",newValue)}}});</script></dom-module><dom-module id="iron-a11y-announcer" assetpath="../iron-a11y-announcer/"><template><style>:host{display:inline-block;position:fixed;clip:rect(0px,0px,0px,0px);}</style><div aria-live$="[[mode]]">[[_text]]</div></template><script>(function(){"use strict";Polymer.IronA11yAnnouncer=Polymer({is:"iron-a11y-announcer",properties:{/**
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@@ -8375,7 +8347,7 @@
      * @return {boolean}
      * @suppress {missingProperties}
      * @private
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+     */_shouldBeBehindOverlay:function _shouldBeBehindOverlay(overlay1,overlay2){return!overlay1.alwaysOnTop&&overlay2.alwaysOnTop}};Polymer.IronOverlayManager=new Polymer.IronOverlayManagerClass;</script><script>(function(){"use strict";/**
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@@ -8492,7 +8464,7 @@
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+info.deltaY=lastTouchPosition.pageY-touch.pageY}return info}}})();</script><script>(function(){"use strict";var p=Element.prototype,matches=p.matches||p.matchesSelector||p.mozMatchesSelector||p.msMatchesSelector||p.oMatchesSelector||p.webkitMatchesSelector;Polymer.IronFocusablesHelper={/**
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      * It searches the tabbable nodes in the light and shadow dom of the chidren,
      * sorting the result by tabindex.
@@ -8584,7 +8556,7 @@
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 // e.g. in Firefox `<div contenteditable>` has `tabIndex = -1`
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+var ati=Math.max(a.tabIndex,0),bti=Math.max(b.tabIndex,0);return 0===ati||0===bti?bti>ati:ati>bti}}})();</script><script>(function(){"use strict";/** @polymerBehavior */Polymer.IronOverlayBehaviorImpl={properties:{/**
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        */opened:{observer:"_openedChanged",type:Boolean,value:!1,notify:!0},/**
        * True if the overlay was canceled when it was last closed.
@@ -8872,7 +8844,7 @@
    * @event iron-overlay-closed
    * @param {Event} event The `event.detail` is the `closingReason` property
    * (contains `canceled`, whether the overlay was canceled).
-   */})();</script><dom-module id="paper-toast" assetpath="../paper-toast/"><template><style>:host{display:block;position:fixed;background-color:var(--paper-toast-background-color, #323232);color:var(--paper-toast-color, #f1f1f1);min-height:48px;min-width:288px;padding:16px 24px;box-sizing:border-box;box-shadow:0 2px 5px 0 rgba(0, 0, 0, 0.26);border-radius:2px;margin:12px;font-size:14px;cursor:default;-webkit-transition:-webkit-transform 0.3s, opacity 0.3s;transition:transform 0.3s, opacity 0.3s;opacity:0;-webkit-transform:translateY(100px);transform:translateY(100px);@apply --paper-font-common-base;}:host(.capsule){border-radius:24px;}:host(.fit-bottom){width:100%;min-width:0;border-radius:0;margin:0;}:host(.paper-toast-open){opacity:1;-webkit-transform:translateY(0px);transform:translateY(0px);}</style><span id="label">{{text}}</span><slot></slot></template><script>(function(){'use strict';// Keeps track of the toast currently opened.
+   */})();</script><dom-module id="paper-toast" assetpath="../paper-toast/"><template><style>:host{display:block;position:fixed;background-color:var(--paper-toast-background-color, #323232);color:var(--paper-toast-color, #f1f1f1);min-height:48px;min-width:288px;padding:16px 24px;box-sizing:border-box;box-shadow:0 2px 5px 0 rgba(0, 0, 0, 0.26);border-radius:2px;margin:12px;font-size:14px;cursor:default;-webkit-transition:-webkit-transform 0.3s, opacity 0.3s;transition:transform 0.3s, opacity 0.3s;opacity:0;-webkit-transform:translateY(100px);transform:translateY(100px);@apply --paper-font-common-base;}:host(.capsule){border-radius:24px;}:host(.fit-bottom){width:100%;min-width:0;border-radius:0;margin:0;}:host(.paper-toast-open){opacity:1;-webkit-transform:translateY(0px);transform:translateY(0px);}</style><span id="label">{{text}}</span><slot></slot></template><script>(function(){"use strict";// Keeps track of the toast currently opened.
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diff --git a/docs/vaadin-router/demo/demo-elements/user.bundle.html b/docs/vaadin-router/demo/demo-elements/user.bundle.html
index aa4185c6..9f346de8 100644
--- a/docs/vaadin-router/demo/demo-elements/user.bundle.html
+++ b/docs/vaadin-router/demo/demo-elements/user.bundle.html
@@ -1 +1 @@
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\ No newline at end of file
+<html><head></head><body><dom-module id="x-user-html-bundle-view"><template><style>:host{display:block;}</style><h1>User Profile</h1><p>User id: <b>[[location.params.id]]</b>. This view was loaded using HTML bundle.</p></template></dom-module><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){var XUserHtmlBundleView=/*#__PURE__*/function(_Polymer$Element){babelHelpers.inherits(XUserHtmlBundleView,_Polymer$Element);var _super=_createSuper(XUserHtmlBundleView);function XUserHtmlBundleView(){babelHelpers.classCallCheck(this,XUserHtmlBundleView);return _super.apply(this,arguments)}babelHelpers.createClass(XUserHtmlBundleView,null,[{key:"is",get:function get(){return"x-user-html-bundle-view"}}]);return XUserHtmlBundleView}(Polymer.Element);customElements.define(XUserHtmlBundleView.is,XUserHtmlBundleView)})();</script></body></html>
\ No newline at end of file
diff --git a/docs/vaadin-router/demo/demo-elements/user.bundle.js b/docs/vaadin-router/demo/demo-elements/user.bundle.js
index 61b7a0a1..2cc002bb 100644
--- a/docs/vaadin-router/demo/demo-elements/user.bundle.js
+++ b/docs/vaadin-router/demo/demo-elements/user.bundle.js
@@ -1 +1 @@
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\ No newline at end of file
+function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){var XUserJsBundleView=/*#__PURE__*/function(_Polymer$Element){"use strict";babelHelpers.inherits(XUserJsBundleView,_Polymer$Element);var _super=_createSuper(XUserJsBundleView);function XUserJsBundleView(){babelHelpers.classCallCheck(this,XUserJsBundleView);return _super.apply(this,arguments)}babelHelpers.createClass(XUserJsBundleView,null,[{key:"is",get:function get(){return"x-user-js-bundle-view"}},{key:"template",get:function get(){var tpl=document.createElement("template");tpl.innerHTML="\n        <h1>User Profile</h1>\n        <p>User id: <b>[[location.params.id]]</b>. This view was loaded using JS bundle.</p>\n      ";return tpl}}]);return XUserJsBundleView}(Polymer.Element);customElements.define(XUserJsBundleView.is,XUserJsBundleView)})();
\ No newline at end of file
diff --git a/docs/vaadin-router/demo/demo-shell.html b/docs/vaadin-router/demo/demo-shell.html
index 51f83a39..bde6c9d2 100644
--- a/docs/vaadin-router/demo/demo-shell.html
+++ b/docs/vaadin-router/demo/demo-shell.html
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 // cannot extend a base Set via the constructor.
-var mixinSet=Object.create(/** @type {!MixinFunction} */extended.__mixinSet||baseSet||null);mixinSet[mixinDedupeId]=!0;/** @type {!MixinFunction} */extended.__mixinSet=mixinSet;return extended}return(/** @type {T} */dedupingMixin)};/* eslint-enable valid-jsdoc */})();</script><script>(function(){'use strict';var MODULE_STYLE_LINK_SELECTOR="link[rel=import][type~=css]",INCLUDE_ATTR="include",SHADY_UNSCOPED_ATTR="shady-unscoped";function importModule(moduleId){var/** Polymer.DomModule */PolymerDomModule=customElements.get("dom-module");if(!PolymerDomModule){return null}return PolymerDomModule.import(moduleId)}function styleForImport(importDoc){// NOTE: polyfill affordance.
+var mixinSet=Object.create(/** @type {!MixinFunction} */extended.__mixinSet||baseSet||null);mixinSet[mixinDedupeId]=!0;/** @type {!MixinFunction} */extended.__mixinSet=mixinSet;return extended}return(/** @type {T} */dedupingMixin)};/* eslint-enable valid-jsdoc */})();</script><script>(function(){"use strict";var MODULE_STYLE_LINK_SELECTOR="link[rel=import][type~=css]",INCLUDE_ATTR="include",SHADY_UNSCOPED_ATTR="shady-unscoped";function importModule(moduleId){var/** Polymer.DomModule */PolymerDomModule=customElements.get("dom-module");if(!PolymerDomModule){return null}return PolymerDomModule.import(moduleId)}function styleForImport(importDoc){// NOTE: polyfill affordance.
 // under the HTMLImports polyfill, there will be no 'body',
 // but the import pseudo-doc can be used directly.
 var container=importDoc.body?importDoc.body:importDoc,importCss=Polymer.ResolveUrl.resolveCss(container.textContent,importDoc.baseURI),style=document.createElement("style");style.textContent=importCss;return style}/** @typedef {{assetpath: string}} */var templateWithAssetPath,StyleGather={/**
@@ -267,7 +267,7 @@
    * @namespace
    * @memberof Polymer
    * @summary Module with utilities for collection CSS text from various sources.
-   */Polymer.StyleGather=StyleGather})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var modules={},lcModules={};function setModule(id,module){// store id separate from lowercased id so that
+   */Polymer.StyleGather=StyleGather})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var modules={},lcModules={};function setModule(id,module){// store id separate from lowercased id so that
 // in all cases mixedCase id will stored distinctly
 // and lowercase version is a fallback
 modules[id]=lcModules[id.toLowerCase()]=module}function findModule(id){return modules[id]||lcModules[id.toLowerCase()]}function styleOutsideTemplateCheck(inst){if(inst.querySelector("style")){console.warn("dom-module %s has style outside template",inst.id)}}/**
@@ -295,13 +295,13 @@
    * @summary Custom element that provides a registry of relocatable DOM content
    *   by `id` that is agnostic to bundling.
    * @unrestricted
-   */var DomModule=/*#__PURE__*/function(_HTMLElement){babelHelpers.inherits(DomModule,_HTMLElement);var _super=_createSuper(DomModule);function DomModule(){babelHelpers.classCallCheck(this,DomModule);return _super.apply(this,arguments)}babelHelpers.createClass(DomModule,[{key:"attributeChangedCallback",/* eslint-disable no-unused-vars */ /**
+   */var DomModule=/*#__PURE__*/function(_HTMLElement){babelHelpers.inherits(DomModule,_HTMLElement);var _super=_createSuper(DomModule);function DomModule(){babelHelpers.classCallCheck(this,DomModule);return _super.apply(this,arguments)}babelHelpers.createClass(DomModule,[{key:"attributeChangedCallback",value:/* eslint-disable no-unused-vars */ /**
      * @param {string} name Name of attribute.
      * @param {?string} old Old value of attribute.
      * @param {?string} value Current value of attribute.
      * @param {?string} namespace Attribute namespace.
      * @return {void}
-     */value:function attributeChangedCallback(name,old,value,namespace){if(old!==value){this.register()}}/* eslint-enable no-unused-args */ /**
+     */function attributeChangedCallback(name,old,value,namespace){if(old!==value){this.register()}}/* eslint-enable no-unused-args */ /**
      * The absolute URL of the original location of this `dom-module`.
      *
      * This value will differ from this element's `ownerDocument` in the
@@ -311,25 +311,25 @@
      * - Uses the HTMLImports polyfill's `importForElement` API to ensure
      *   the path is relative to the import document's location since
      *   `ownerDocument` is not currently polyfilled
-     */},{key:"register",/**
+     */},{key:"assetpath",get:function get(){// Don't override existing assetpath.
+if(!this.__assetpath){// note: assetpath set via an attribute must be relative to this
+// element's location; accomodate polyfilled HTMLImports
+var owner=window.HTMLImports&&HTMLImports.importForElement?HTMLImports.importForElement(this)||document:this.ownerDocument,url=Polymer.ResolveUrl.resolveUrl(this.getAttribute("assetpath")||"",owner.baseURI);this.__assetpath=Polymer.ResolveUrl.pathFromUrl(url)}return this.__assetpath}/**
      * Registers the dom-module at a given id. This method should only be called
      * when a dom-module is imperatively created. For
      * example, `document.createElement('dom-module').register('foo')`.
      * @param {string=} id The id at which to register the dom-module.
      * @return {void}
-     */value:function register(id){id=id||this.id;if(id){// Under strictTemplatePolicy, reject and null out any re-registered
+     */},{key:"register",value:function register(id){id=id||this.id;if(id){// Under strictTemplatePolicy, reject and null out any re-registered
 // dom-module since it is ambiguous whether first-in or last-in is trusted 
-if(Polymer.strictTemplatePolicy&&findModule(id)!==void 0){setModule(id,null);throw new Error("strictTemplatePolicy: dom-module ".concat(id," re-registered"))}this.id=id;setModule(id,this);styleOutsideTemplateCheck(this)}}},{key:"assetpath",get:function get(){// Don't override existing assetpath.
-if(!this.__assetpath){// note: assetpath set via an attribute must be relative to this
-// element's location; accomodate polyfilled HTMLImports
-var owner=window.HTMLImports&&HTMLImports.importForElement?HTMLImports.importForElement(this)||document:this.ownerDocument,url=Polymer.ResolveUrl.resolveUrl(this.getAttribute("assetpath")||"",owner.baseURI);this.__assetpath=Polymer.ResolveUrl.pathFromUrl(url)}return this.__assetpath}}],[{key:"import",/**
+if(Polymer.strictTemplatePolicy&&findModule(id)!==void 0){setModule(id,null);throw new Error("strictTemplatePolicy: dom-module ".concat(id," re-registered"))}this.id=id;setModule(id,this);styleOutsideTemplateCheck(this)}}}],[{key:"observedAttributes",get:function get(){return["id"]}/**
      * Retrieves the element specified by the css `selector` in the module
      * registered by `id`. For example, this.import('foo', 'img');
      * @param {string} id The id of the dom-module in which to search.
      * @param {string=} selector The css selector by which to find the element.
      * @return {Element} Returns the element which matches `selector` in the
      * module registered at the specified `id`.
-     */value:function _import(id,selector){if(id){var m=findModule(id);if(m&&selector){return m.querySelector(selector)}return m}return null}},{key:"observedAttributes",get:function get(){return["id"]}}]);return DomModule}(/*#__PURE__*/babelHelpers.wrapNativeSuper(HTMLElement));DomModule.prototype.modules=modules;customElements.define("dom-module",DomModule);/** @const */Polymer.DomModule=DomModule})();</script><script>(function(){'use strict';/**
+     */},{key:"import",value:function _import(id,selector){if(id){var m=findModule(id);if(m&&selector){return m.querySelector(selector)}return m}return null}}]);return DomModule}(/*#__PURE__*/babelHelpers.wrapNativeSuper(HTMLElement));DomModule.prototype.modules=modules;customElements.define("dom-module",DomModule);/** @const */Polymer.DomModule=DomModule})();</script><script>(function(){"use strict";/**
    * Module with utilities for manipulating structured data path strings.
    *
    * @namespace
@@ -488,7 +488,7 @@
    * @memberof Polymer.Path
    * @param {string} path Path string
    * @return {boolean} True if the string contained one or more dots
-   */Path.isDeep=Path.isPath;Polymer.Path=Path})();</script><script>(function(){'use strict';var caseMap={},DASH_TO_CAMEL=/-[a-z]/g,CAMEL_TO_DASH=/([A-Z])/g,CaseMap={/**
+   */Path.isDeep=Path.isPath;Polymer.Path=Path})();</script><script>(function(){"use strict";var caseMap={},DASH_TO_CAMEL=/-[a-z]/g,CAMEL_TO_DASH=/([A-Z])/g,CaseMap={/**
      * Converts "dash-case" identifier (e.g. `foo-bar-baz`) to "camelCase"
      * (e.g. `fooBarBaz`).
      *
@@ -502,8 +502,8 @@
      * @memberof Polymer.CaseMap
      * @param {string} camel Camel-case identifier
      * @return {string} Dash-case representation of the identifier
-     */camelToDashCase:function camelToDashCase(camel){return caseMap[camel]||(caseMap[camel]=camel.replace(CAMEL_TO_DASH,"-$1").toLowerCase())}};Polymer.CaseMap=CaseMap})();</script><script>(function(){'use strict';// Microtask implemented using Mutation Observer
-var microtaskCurrHandle=0,microtaskLastHandle=0,microtaskCallbacks=[],microtaskNodeContent=0,microtaskNode=document.createTextNode("");new window.MutationObserver(microtaskFlush).observe(microtaskNode,{characterData:!0});function microtaskFlush(){for(var len=microtaskCallbacks.length,i=0,cb;i<len;i++){cb=microtaskCallbacks[i];if(cb){try{cb()}catch(e){setTimeout(function(){throw e})}}}microtaskCallbacks.splice(0,len);microtaskLastHandle+=len}/**
+     */camelToDashCase:function camelToDashCase(camel){return caseMap[camel]||(caseMap[camel]=camel.replace(CAMEL_TO_DASH,"-$1").toLowerCase())}};Polymer.CaseMap=CaseMap})();</script><script>(function(){"use strict";// Microtask implemented using Mutation Observer
+var microtaskCurrHandle=0,microtaskLastHandle=0,microtaskCallbacks=[],microtaskNodeContent=0,microtaskNode=document.createTextNode("");new window.MutationObserver(microtaskFlush).observe(microtaskNode,{characterData:!0});function microtaskFlush(){for(var len=microtaskCallbacks.length,_loop=function _loop(){var cb=microtaskCallbacks[i];if(cb){try{cb()}catch(e){setTimeout(function(){throw e})}}},i=0;i<len;i++){_loop()}microtaskCallbacks.splice(0,len);microtaskLastHandle+=len}/**
    * Module that provides a number of strategies for enqueuing asynchronous
    * tasks.  Each sub-module provides a standard `run(fn)` interface that returns a
    * handle, and a `cancel(handle)` interface for canceling async tasks before
@@ -601,7 +601,7 @@
        * @memberof Polymer.Async.microTask
        * @param {number} handle Handle returned from `run` of callback to cancel
        * @return {void}
-       */cancel:function cancel(handle){var idx=handle-microtaskLastHandle;if(0<=idx){if(!microtaskCallbacks[idx]){throw new Error("invalid async handle: "+handle)}microtaskCallbacks[idx]=null}}}}})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';/** @const {!AsyncInterface} */var microtask=Polymer.Async.microTask;/**
+       */cancel:function cancel(handle){var idx=handle-microtaskLastHandle;if(0<=idx){if(!microtaskCallbacks[idx]){throw new Error("invalid async handle: "+handle)}microtaskCallbacks[idx]=null}}}}})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";/** @const {!AsyncInterface} */var microtask=Polymer.Async.microTask;/**
      * Element class mixin that provides basic meta-programming for creating one
      * or more property accessors (getter/setter pair) that enqueue an async
      * (batched) `_propertiesChanged` callback.
@@ -625,7 +625,20 @@
        * @extends {superClass}
        * @implements {Polymer_PropertiesChanged}
        * @unrestricted
-       */var PropertiesChanged=/*#__PURE__*/function(_superClass){babelHelpers.inherits(PropertiesChanged,_superClass);var _super=_createSuper(PropertiesChanged);babelHelpers.createClass(PropertiesChanged,[{key:"_createPropertyAccessor",//eslint-disable-line no-unused-vars
+       */var PropertiesChanged=/*#__PURE__*/function(_superClass){babelHelpers.inherits(PropertiesChanged,_superClass);var _super=_createSuper(PropertiesChanged);function PropertiesChanged(){var _this;babelHelpers.classCallCheck(this,PropertiesChanged);_this=_super.call(this);_this.__dataEnabled=!1;_this.__dataReady=!1;_this.__dataInvalid=!1;_this.__data={};_this.__dataPending=null;_this.__dataOld=null;_this.__dataInstanceProps=null;_this.__serializing=!1;_this._initializeProperties();return _this}/**
+         * Lifecycle callback called when properties are enabled via
+         * `_enableProperties`.
+         *
+         * Users may override this function to implement behavior that is
+         * dependent on the element having its property data initialized, e.g.
+         * from defaults (initialized from `constructor`, `_initializeProperties`),
+         * `attributeChangedCallback`, or values propagated from host e.g. via
+         * bindings.  `super.ready()` must be called to ensure the data system
+         * becomes enabled.
+         *
+         * @return {void}
+         * @public
+         */babelHelpers.createClass(PropertiesChanged,[{key:"_createPropertyAccessor",value://eslint-disable-line no-unused-vars
 /**
          * Creates a setter/getter pair for the named property with its own
          * local storage.  The getter returns the value in the local storage,
@@ -641,7 +654,7 @@
          *   protected `_setProperty` function must be used to set the property
          * @return {void}
          * @protected
-         */value:function _createPropertyAccessor(property,readOnly){this._addPropertyToAttributeMap(property);if(!this.hasOwnProperty("__dataHasAccessor")){this.__dataHasAccessor=Object.assign({},this.__dataHasAccessor)}if(!this.__dataHasAccessor[property]){this.__dataHasAccessor[property]=!0;this._definePropertyAccessor(property,readOnly)}}/**
+         */function _createPropertyAccessor(property,readOnly){this._addPropertyToAttributeMap(property);if(!this.hasOwnProperty("__dataHasAccessor")){this.__dataHasAccessor=Object.assign({},this.__dataHasAccessor)}if(!this.__dataHasAccessor[property]){this.__dataHasAccessor[property]=!0;this._definePropertyAccessor(property,readOnly)}}/**
          * Adds the given `property` to a map matching attribute names
          * to property names, using `attributeNameForProperty`. This map is
          * used when deserializing attribute values to properties.
@@ -652,40 +665,7 @@
          * @param {string} property Name of the property
          * @param {boolean=} readOnly When true, no setter is created
          * @return {void}
-         */},{key:"_definePropertyAccessor",value:function _definePropertyAccessor(property,readOnly){Object.defineProperty(this,property,{/* eslint-disable valid-jsdoc */ /** @this {PropertiesChanged} */get:function get(){return this._getProperty(property)},/** @this {PropertiesChanged} */set:readOnly?function(){}:function(value){this._setProperty(property,value)}/* eslint-enable */})}}],[{key:"createProperties",/**
-         * Creates property accessors for the given property names.
-         * @param {!Object} props Object whose keys are names of accessors.
-         * @return {void}
-         * @protected
-         */value:function createProperties(props){var proto=this.prototype;for(var prop in props){// don't stomp an existing accessor
-if(!(prop in proto)){proto._createPropertyAccessor(prop)}}}/**
-         * Returns an attribute name that corresponds to the given property.
-         * The attribute name is the lowercased property name. Override to
-         * customize this mapping.
-         * @param {string} property Property to convert
-         * @return {string} Attribute name corresponding to the given property.
-         *
-         * @protected
-         */},{key:"attributeNameForProperty",value:function attributeNameForProperty(property){return property.toLowerCase()}/**
-         * Override point to provide a type to which to deserialize a value to
-         * a given property.
-         * @param {string} name Name of property
-         *
-         * @protected
-         */},{key:"typeForProperty",value:function typeForProperty(name){}}]);function PropertiesChanged(){var _this;babelHelpers.classCallCheck(this,PropertiesChanged);_this=_super.call(this);_this.__dataEnabled=!1;_this.__dataReady=!1;_this.__dataInvalid=!1;_this.__data={};_this.__dataPending=null;_this.__dataOld=null;_this.__dataInstanceProps=null;_this.__serializing=!1;_this._initializeProperties();return _this}/**
-         * Lifecycle callback called when properties are enabled via
-         * `_enableProperties`.
-         *
-         * Users may override this function to implement behavior that is
-         * dependent on the element having its property data initialized, e.g.
-         * from defaults (initialized from `constructor`, `_initializeProperties`),
-         * `attributeChangedCallback`, or values propagated from host e.g. via
-         * bindings.  `super.ready()` must be called to ensure the data system
-         * becomes enabled.
-         *
-         * @return {void}
-         * @public
-         */babelHelpers.createClass(PropertiesChanged,[{key:"ready",value:function ready(){this.__dataReady=!0;this._flushProperties()}/**
+         */},{key:"_definePropertyAccessor",value:function _definePropertyAccessor(property,readOnly){Object.defineProperty(this,property,{/* eslint-disable valid-jsdoc */ /** @this {PropertiesChanged} */get:function get(){return this._getProperty(property)},/** @this {PropertiesChanged} */set:readOnly?function(){}:function(value){this._setProperty(property,value)}/* eslint-enable */})}},{key:"ready",value:function ready(){this.__dataReady=!0;this._flushProperties()}/**
          * Initializes the local storage for property accessors.
          *
          * Provided as an override point for performing any setup work prior
@@ -863,7 +843,27 @@
          * @param {?string} value Value to deserialize.
          * @param {*=} type Type to deserialize the string to.
          * @return {*} Typed value deserialized from the provided string.
-         */},{key:"_deserializeValue",value:function _deserializeValue(value,type){switch(type){case Boolean:return null!==value;case Number:return+value;default:return value;}}}]);return PropertiesChanged}(superClass);return PropertiesChanged})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var caseMap=Polymer.CaseMap,nativeProperties={},proto=HTMLElement.prototype;// Save map of native properties; this forms a blacklist or properties
+         */},{key:"_deserializeValue",value:function _deserializeValue(value,type){switch(type){case Boolean:return null!==value;case Number:return+value;default:return value;}}}],[{key:"createProperties",value:/**
+         * Creates property accessors for the given property names.
+         * @param {!Object} props Object whose keys are names of accessors.
+         * @return {void}
+         * @protected
+         */function createProperties(props){var proto=this.prototype;for(var prop in props){// don't stomp an existing accessor
+if(!(prop in proto)){proto._createPropertyAccessor(prop)}}}/**
+         * Returns an attribute name that corresponds to the given property.
+         * The attribute name is the lowercased property name. Override to
+         * customize this mapping.
+         * @param {string} property Property to convert
+         * @return {string} Attribute name corresponding to the given property.
+         *
+         * @protected
+         */},{key:"attributeNameForProperty",value:function attributeNameForProperty(property){return property.toLowerCase()}/**
+         * Override point to provide a type to which to deserialize a value to
+         * a given property.
+         * @param {string} name Name of property
+         *
+         * @protected
+         */},{key:"typeForProperty",value:function typeForProperty(name){}}]);return PropertiesChanged}(superClass);return PropertiesChanged})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var caseMap=Polymer.CaseMap,nativeProperties={},proto=HTMLElement.prototype;// Save map of native properties; this forms a blacklist or properties
 // that won't have their values "saved" by `saveAccessorValue`, since
 // reading from an HTMLElement accessor from the context of a prototype throws
 while(proto){for(var props=Object.getOwnPropertyNames(proto),i=0;i<props.length;i++){nativeProperties[props[i]]=!0}proto=Object.getPrototypeOf(proto)}/**
@@ -917,14 +917,14 @@
      * @implements {Polymer_PropertiesChanged}
      * @unrestricted
      * @private
-     */var base=Polymer.PropertiesChanged(superClass),PropertyAccessors=/*#__PURE__*/function(_base){babelHelpers.inherits(PropertyAccessors,_base);var _super=_createSuper(PropertyAccessors);function PropertyAccessors(){babelHelpers.classCallCheck(this,PropertyAccessors);return _super.apply(this,arguments)}babelHelpers.createClass(PropertyAccessors,[{key:"_initializeProperties",/**
+     */var base=Polymer.PropertiesChanged(superClass),PropertyAccessors=/*#__PURE__*/function(_base){babelHelpers.inherits(PropertyAccessors,_base);var _super=_createSuper(PropertyAccessors);function PropertyAccessors(){babelHelpers.classCallCheck(this,PropertyAccessors);return _super.apply(this,arguments)}babelHelpers.createClass(PropertyAccessors,[{key:"_initializeProperties",value:/**
        * Overrides PropertiesChanged implementation to initialize values for
        * accessors created for values that already existed on the element
        * prototype.
        *
        * @return {void}
        * @protected
-       */value:function _initializeProperties(){if(this.__dataProto){this._initializeProtoProperties(this.__dataProto);this.__dataProto=null}babelHelpers.get(babelHelpers.getPrototypeOf(PropertyAccessors.prototype),"_initializeProperties",this).call(this)}/**
+       */function _initializeProperties(){if(this.__dataProto){this._initializeProtoProperties(this.__dataProto);this.__dataProto=null}babelHelpers.get(babelHelpers.getPrototypeOf(PropertyAccessors.prototype),"_initializeProperties",this).call(this)}/**
        * Called at instance time with bag of properties that were overwritten
        * by accessors on the prototype when accessors were created.
        *
@@ -992,7 +992,7 @@
        * @param {string} prop Property name
        * @return {boolean} True if property has a pending change
        * @protected
-       */},{key:"_isPropertyPending",value:function _isPropertyPending(prop){return!!(this.__dataPending&&prop in this.__dataPending)}}],[{key:"createPropertiesForAttributes",/**
+       */},{key:"_isPropertyPending",value:function _isPropertyPending(prop){return!!(this.__dataPending&&prop in this.__dataPending)}}],[{key:"createPropertiesForAttributes",value:/**
        * Generates property accessors for all attributes in the standard
        * static `observedAttributes` array.
        *
@@ -1000,7 +1000,7 @@
        * `camelCase` convention
        *
        * @return {void}
-       */value:function createPropertiesForAttributes(){for(var a$=this.observedAttributes,_i=0;_i<a$.length;_i++){this.prototype._createPropertyAccessor(caseMap.dashToCamelCase(a$[_i]))}}/**
+       */function createPropertiesForAttributes(){for(var a$=this.observedAttributes,_i=0;_i<a$.length;_i++){this.prototype._createPropertyAccessor(caseMap.dashToCamelCase(a$[_i]))}}/**
        * Returns an attribute name that corresponds to the given property.
        * By default, converts camel to dash case, e.g. `fooBar` to `foo-bar`.
        * @param {string} property Property to convert
@@ -1013,7 +1013,7 @@
      * @implements {Polymer_PropertyAccessors}
      * @extends {base}
      * @unrestricted
-     */return PropertyAccessors})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var walker=document.createTreeWalker(document,NodeFilter.SHOW_ALL,null,!1),templateExtensions={"dom-if":!0,"dom-repeat":!0};// 1.x backwards-compatible auto-wrapper for template type extensions
+     */return PropertyAccessors})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var walker=document.createTreeWalker(document,NodeFilter.SHOW_ALL,null,!1),templateExtensions={"dom-if":!0,"dom-repeat":!0};// 1.x backwards-compatible auto-wrapper for template type extensions
 // This is a clear layering violation and gives favored-nation status to
 // dom-if and dom-repeat templates.  This is a conceit we're choosing to keep
 // a.) to ease 1.x backwards-compatibility due to loss of `is`, and
@@ -1046,7 +1046,7 @@
      * @polymer
      * @mixinClass
      * @implements {Polymer_TemplateStamp}
-     */var TemplateStamp=/*#__PURE__*/function(_superClass){babelHelpers.inherits(TemplateStamp,_superClass);var _super=_createSuper(TemplateStamp);function TemplateStamp(){babelHelpers.classCallCheck(this,TemplateStamp);return _super.apply(this,arguments)}babelHelpers.createClass(TemplateStamp,[{key:"_stampTemplate",/**
+     */var TemplateStamp=/*#__PURE__*/function(_superClass){babelHelpers.inherits(TemplateStamp,_superClass);var _super=_createSuper(TemplateStamp);function TemplateStamp(){babelHelpers.classCallCheck(this,TemplateStamp);return _super.apply(this,arguments)}babelHelpers.createClass(TemplateStamp,[{key:"_stampTemplate",value:/**
        * Clones the provided template content and returns a document fragment
        * containing the cloned dom.
        *
@@ -1067,7 +1067,7 @@
        *
        * @param {!HTMLTemplateElement} template Template to stamp
        * @return {!StampedTemplate} Cloned template content
-       */value:function _stampTemplate(template){// Polyfill support: bootstrap the template if it has not already been
+       */function _stampTemplate(template){// Polyfill support: bootstrap the template if it has not already been
 if(template&&!template.content&&window.HTMLTemplateElement&&HTMLTemplateElement.decorate){HTMLTemplateElement.decorate(template)}var templateInfo=this.constructor._parseTemplate(template),nodeInfo=templateInfo.nodeInfoList,content=templateInfo.content||template.content,dom=/** @type {DocumentFragment} */document.importNode(content,!0);// NOTE: ShadyDom optimization indicating there is an insertion point
 dom.__noInsertionPoint=!templateInfo.hasInsertionPoint;var nodes=dom.nodeList=Array(nodeInfo.length);dom.$={};for(var i=0,l=nodeInfo.length,info,node;i<l&&(info=nodeInfo[i]);i++){node=nodes[i]=findTemplateNode(dom,info);applyIdToMap(this,dom.$,node,info);applyTemplateContent(this,node,info);applyEventListener(this,node,info)}dom=/** @type {!StampedTemplate} */dom;// eslint-disable-line no-self-assign
 return dom}/**
@@ -1096,7 +1096,7 @@
        * @param {string} eventName Name of event
        * @param {function(!Event):void} handler Listener function to remove
        * @return {void}
-       */},{key:"_removeEventListenerFromNode",value:function _removeEventListenerFromNode(node,eventName,handler){node.removeEventListener(eventName,handler)}}],[{key:"_parseTemplate",/**
+       */},{key:"_removeEventListenerFromNode",value:function _removeEventListenerFromNode(node,eventName,handler){node.removeEventListener(eventName,handler)}}],[{key:"_parseTemplate",value:/**
        * Scans a template to produce template metadata.
        *
        * Template-specific metadata are stored in the object returned, and node-
@@ -1170,7 +1170,7 @@
        * @param {TemplateInfo=} outerTemplateInfo Template metadata from the outer
        *   template, for parsing nested templates
        * @return {!TemplateInfo} Parsed template metadata
-       */value:function _parseTemplate(template,outerTemplateInfo){// since a template may be re-used, memo-ize metadata
+       */function _parseTemplate(template,outerTemplateInfo){// since a template may be re-used, memo-ize metadata
 if(!template._templateInfo){var templateInfo=template._templateInfo={};templateInfo.nodeInfoList=[];templateInfo.stripWhiteSpace=outerTemplateInfo&&outerTemplateInfo.stripWhiteSpace||template.hasAttribute("strip-whitespace");this._parseTemplateContent(template,templateInfo,{parent:null})}return template._templateInfo}},{key:"_parseTemplateContent",value:function _parseTemplateContent(template,templateInfo,nodeInfo){return this._parseTemplateNode(template.content,templateInfo,nodeInfo)}/**
        * Parses template node and adds template and node metadata based on
        * the current node, and its `childNodes` and `attributes`.
@@ -1255,7 +1255,7 @@
        *
        * @param {HTMLTemplateElement} template Template to retrieve `content` for
        * @return {DocumentFragment} Content fragment
-       */},{key:"_contentForTemplate",value:function _contentForTemplate(template){var templateInfo=/** @type {HTMLTemplateElementWithInfo} */template._templateInfo;return templateInfo&&templateInfo.content||template.content}}]);return TemplateStamp}(superClass);return TemplateStamp})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';/** @const {Object} */var CaseMap=Polymer.CaseMap,dedupeId=0,TYPES={COMPUTE:"__computeEffects",REFLECT:"__reflectEffects",NOTIFY:"__notifyEffects",PROPAGATE:"__propagateEffects",OBSERVE:"__observeEffects",READ_ONLY:"__readOnly"},capitalAttributeRegex=/[A-Z]/,DataTrigger,DataEffect,PropertyEffectsType;// Monotonically increasing unique ID used for de-duping effects triggered
+       */},{key:"_contentForTemplate",value:function _contentForTemplate(template){var templateInfo=/** @type {HTMLTemplateElementWithInfo} */template._templateInfo;return templateInfo&&templateInfo.content||template.content}}]);return TemplateStamp}(superClass);return TemplateStamp})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";/** @const {Object} */var CaseMap=Polymer.CaseMap,dedupeId=0,TYPES={COMPUTE:"__computeEffects",REFLECT:"__reflectEffects",NOTIFY:"__notifyEffects",PROPAGATE:"__propagateEffects",OBSERVE:"__observeEffects",READ_ONLY:"__readOnly"},capitalAttributeRegex=/[A-Z]/,DataTrigger,DataEffect,PropertyEffectsType;// Monotonically increasing unique ID used for de-duping effects triggered
 // from multiple properties in the same turn
 //eslint-disable-line no-unused-vars
 /**
@@ -1741,9 +1741,9 @@
 _this.__isPropertyEffectsClient=!0;/** @type {number} */ // NOTE: used to track re-entrant calls to `_flushProperties`
 // path changes dirty check against `__dataTemp` only during one "turn"
 // and are cleared when `__dataCounter` returns to 0.
-_this.__dataCounter=0;/** @type {boolean} */_this.__dataClientsReady;/** @type {Array} */_this.__dataPendingClients;/** @type {Object} */_this.__dataToNotify;/** @type {Object} */_this.__dataLinkedPaths;/** @type {boolean} */_this.__dataHasPaths;/** @type {Object} */_this.__dataCompoundStorage;/** @type {Polymer_PropertyEffects} */_this.__dataHost;/** @type {!Object} */_this.__dataTemp;/** @type {boolean} */_this.__dataClientsInitialized;/** @type {!Object} */_this.__data;/** @type {!Object} */_this.__dataPending;/** @type {!Object} */_this.__dataOld;/** @type {Object} */_this.__computeEffects;/** @type {Object} */_this.__reflectEffects;/** @type {Object} */_this.__notifyEffects;/** @type {Object} */_this.__propagateEffects;/** @type {Object} */_this.__observeEffects;/** @type {Object} */_this.__readOnly;/** @type {!TemplateInfo} */_this.__templateInfo;return _this}babelHelpers.createClass(PropertyEffects,[{key:"_initializeProperties",/**
+_this.__dataCounter=0;/** @type {boolean} */_this.__dataClientsReady;/** @type {Array} */_this.__dataPendingClients;/** @type {Object} */_this.__dataToNotify;/** @type {Object} */_this.__dataLinkedPaths;/** @type {boolean} */_this.__dataHasPaths;/** @type {Object} */_this.__dataCompoundStorage;/** @type {Polymer_PropertyEffects} */_this.__dataHost;/** @type {!Object} */_this.__dataTemp;/** @type {boolean} */_this.__dataClientsInitialized;/** @type {!Object} */_this.__data;/** @type {!Object} */_this.__dataPending;/** @type {!Object} */_this.__dataOld;/** @type {Object} */_this.__computeEffects;/** @type {Object} */_this.__reflectEffects;/** @type {Object} */_this.__notifyEffects;/** @type {Object} */_this.__propagateEffects;/** @type {Object} */_this.__observeEffects;/** @type {Object} */_this.__readOnly;/** @type {!TemplateInfo} */_this.__templateInfo;return _this}babelHelpers.createClass(PropertyEffects,[{key:"PROPERTY_EFFECT_TYPES",get:function get(){return TYPES}/**
        * @return {void}
-       */value:function _initializeProperties(){babelHelpers.get(babelHelpers.getPrototypeOf(PropertyEffects.prototype),"_initializeProperties",this).call(this);hostStack.registerHost(this);this.__dataClientsReady=!1;this.__dataPendingClients=null;this.__dataToNotify=null;this.__dataLinkedPaths=null;this.__dataHasPaths=!1;// May be set on instance prior to upgrade
+       */},{key:"_initializeProperties",value:function _initializeProperties(){babelHelpers.get(babelHelpers.getPrototypeOf(PropertyEffects.prototype),"_initializeProperties",this).call(this);hostStack.registerHost(this);this.__dataClientsReady=!1;this.__dataPendingClients=null;this.__dataToNotify=null;this.__dataLinkedPaths=null;this.__dataHasPaths=!1;// May be set on instance prior to upgrade
 this.__dataCompoundStorage=this.__dataCompoundStorage||null;this.__dataHost=this.__dataHost||null;this.__dataTemp={};this.__dataClientsInitialized=!1}/**
        * Overrides `Polymer.PropertyAccessors` implementation to provide a
        * more efficient implementation of initializing properties from
@@ -2335,7 +2335,7 @@
        * @param {Object=} effect Effect metadata object
        * @return {void}
        * @protected
-       */},{key:"_bindTemplate",// -- binding ----------------------------------------------
+       */},{key:"_bindTemplate",value:// -- binding ----------------------------------------------
 /**
        * Equivalent to static `bindTemplate` API but can be called on
        * an instance to add effects at runtime.  See that method for
@@ -2357,7 +2357,7 @@
        * @return {!TemplateInfo} Template metadata object; for `runtimeBinding`,
        *   this is an instance of the prototypical template info
        * @protected
-       */value:function _bindTemplate(template,instanceBinding){var templateInfo=this.constructor._parseTemplate(template),wasPreBound=this.__templateInfo==templateInfo;// Optimization: since this is called twice for proto-bound templates,
+       */function _bindTemplate(template,instanceBinding){var templateInfo=this.constructor._parseTemplate(template),wasPreBound=this.__templateInfo==templateInfo;// Optimization: since this is called twice for proto-bound templates,
 // don't attempt to recreate accessors if this template was pre-bound
 if(!wasPreBound){for(var prop in templateInfo.propertyEffects){this._createPropertyAccessor(prop)}}if(instanceBinding){// For instance-time binding, create instance of template metadata
 // and link into list of templates if necessary
@@ -2373,7 +2373,7 @@
        * @param {Object=} effect Effect metadata object
        * @return {void}
        * @protected
-       */},{key:"_stampTemplate",/**
+       */},{key:"_stampTemplate",value:/**
        * Stamps the provided template and performs instance-time setup for
        * Polymer template features, including data bindings, declarative event
        * listeners, and the `this.$` map of `id`'s to nodes.  A document fragment
@@ -2392,7 +2392,7 @@
        * @return {!StampedTemplate} Cloned template content
        * @override
        * @protected
-       */value:function _stampTemplate(template){// Ensures that created dom is `_enqueueClient`'d to this element so
+       */function _stampTemplate(template){// Ensures that created dom is `_enqueueClient`'d to this element so
 // that it can be flushed on next call to `_flushProperties`
 hostStack.beginHosting(this);var dom=babelHelpers.get(babelHelpers.getPrototypeOf(PropertyEffects.prototype),"_stampTemplate",this).call(this,template);hostStack.endHosting(this);var templateInfo=/** @type {!TemplateInfo} */this._bindTemplate(template,!0);// Add template-instance-specific data to instanced templateInfo
 templateInfo.nodeList=dom.nodeList;// Capture child nodes to allow unstamping of non-prototypical templates
@@ -2424,7 +2424,7 @@
        *   metadata to `nodeInfo`
        * @protected
        * @suppress {missingProperties} Interfaces in closure do not inherit statics, but classes do
-       */},{key:"PROPERTY_EFFECT_TYPES",get:function get(){return TYPES}}],[{key:"addPropertyEffect",value:function addPropertyEffect(property,type,effect){this.prototype._addPropertyEffect(property,type,effect)}/**
+       */}],[{key:"addPropertyEffect",value:function addPropertyEffect(property,type,effect){this.prototype._addPropertyEffect(property,type,effect)}/**
        * Creates a single-property observer for the given property.
        *
        * @param {string} property Property name
@@ -2657,7 +2657,7 @@
      * @param {*} inst Instance to end hosting
      * @return {void}
      * @this {hostStack}
-     */endHosting:function endHosting(inst){var stackLen=this.stack.length;if(stackLen&&this.stack[stackLen-1]==inst){this.stack.pop()}}}})();</script><script>(function(){'use strict';/**
+     */endHosting:function endHosting(inst){var stackLen=this.stack.length;if(stackLen&&this.stack[stackLen-1]==inst){this.stack.pop()}}}})();</script><script>(function(){"use strict";/**
    * Provides basic tracking of element definitions (registrations) and
    * instance counts.
    *
@@ -2683,7 +2683,7 @@
      * Logs all elements registered with an `is` to the console.
      * @public
      * @this {this}
-     */dumpRegistrations:function dumpRegistrations(){this.registrations.forEach(this._regLog)}}})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';/**
+     */dumpRegistrations:function dumpRegistrations(){this.registrations.forEach(this._regLog)}}})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";/**
    * Creates a copy of `props` with each property normalized such that
    * upgraded it is an object with at least a type property { type: Type}.
    *
@@ -2736,12 +2736,12 @@
      * @extends {base}
      * @implements {Polymer_PropertiesMixin}
      * @unrestricted
-     */var PropertiesMixin=/*#__PURE__*/function(_base){babelHelpers.inherits(PropertiesMixin,_base);var _super=_createSuper(PropertiesMixin);function PropertiesMixin(){babelHelpers.classCallCheck(this,PropertiesMixin);return _super.apply(this,arguments)}babelHelpers.createClass(PropertiesMixin,[{key:"_initializeProperties",/**
+     */var PropertiesMixin=/*#__PURE__*/function(_base){babelHelpers.inherits(PropertiesMixin,_base);var _super=_createSuper(PropertiesMixin);function PropertiesMixin(){babelHelpers.classCallCheck(this,PropertiesMixin);return _super.apply(this,arguments)}babelHelpers.createClass(PropertiesMixin,[{key:"_initializeProperties",value:/**
        * Overrides `PropertiesChanged` method and adds a call to
        * `finalize` which lazily configures the element's property accessors.
        * @override
        * @return {void}
-       */value:function _initializeProperties(){Polymer.telemetry.instanceCount++;this.constructor.finalize();babelHelpers.get(babelHelpers.getPrototypeOf(PropertiesMixin.prototype),"_initializeProperties",this).call(this)}/**
+       */function _initializeProperties(){Polymer.telemetry.instanceCount++;this.constructor.finalize();babelHelpers.get(babelHelpers.getPrototypeOf(PropertiesMixin.prototype),"_initializeProperties",this).call(this)}/**
        * Called when the element is added to a document.
        * Calls `_enableProperties` to turn on property system from
        * `PropertiesChanged`.
@@ -2751,13 +2751,17 @@
        * Called when the element is removed from a document
        * @suppress {missingProperties} Super may or may not implement the callback
        * @return {void}
-       */},{key:"disconnectedCallback",value:function disconnectedCallback(){if(babelHelpers.get(babelHelpers.getPrototypeOf(PropertiesMixin.prototype),"disconnectedCallback",this)){babelHelpers.get(babelHelpers.getPrototypeOf(PropertiesMixin.prototype),"disconnectedCallback",this).call(this)}}}],[{key:"finalize",/**
+       */},{key:"disconnectedCallback",value:function disconnectedCallback(){if(babelHelpers.get(babelHelpers.getPrototypeOf(PropertiesMixin.prototype),"disconnectedCallback",this)){babelHelpers.get(babelHelpers.getPrototypeOf(PropertiesMixin.prototype),"disconnectedCallback",this).call(this)}}}],[{key:"observedAttributes",get:/**
+       * Implements standard custom elements getter to observes the attributes
+       * listed in `properties`.
+       * @suppress {missingProperties} Interfaces in closure do not inherit statics, but classes do
+       */function get(){var _this=this;if(!this.hasOwnProperty("__observedAttributes")){Polymer.telemetry.register(this.prototype);var props=this._properties;this.__observedAttributes=props?Object.keys(props).map(function(p){return _this.attributeNameForProperty(p)}):[]}return this.__observedAttributes}/**
        * Finalizes an element definition, including ensuring any super classes
        * are also finalized. This includes ensuring property
        * accessors exist on the element prototype. This method calls
        * `_finalizeClass` to finalize each constructor in the prototype chain.
        * @return {void}
-       */value:function finalize(){if(!this.hasOwnProperty(JSCompiler_renameProperty("__finalized",this))){var superCtor=superPropertiesClass(/** @type {PropertiesMixinConstructor} */this);if(superCtor){superCtor.finalize()}this.__finalized=!0;this._finalizeClass()}}/**
+       */},{key:"finalize",value:function finalize(){if(!this.hasOwnProperty(JSCompiler_renameProperty("__finalized",this))){var superCtor=superPropertiesClass(/** @type {PropertiesMixinConstructor} */this);if(superCtor){superCtor.finalize()}this.__finalized=!0;this._finalizeClass()}}/**
        * Finalize an element class. This includes ensuring property
        * accessors exist on the element prototype. This method is called by
        * `finalize` and finalizes the class constructor.
@@ -2770,18 +2774,14 @@
        *
        * @return {Object} Object containing properties for this class
        * @protected
-       */},{key:"typeForProperty",/**
+       */},{key:"_properties",get:function get(){if(!this.hasOwnProperty(JSCompiler_renameProperty("__properties",this))){var superCtor=superPropertiesClass(/** @type {PropertiesMixinConstructor} */this);this.__properties=Object.assign({},superCtor&&superCtor._properties,ownProperties(/** @type {PropertiesMixinConstructor} */this))}return this.__properties}/**
        * Overrides `PropertiesChanged` method to return type specified in the
        * static `properties` object for the given property.
        * @param {string} name Name of property
        * @return {*} Type to which to deserialize attribute
        *
        * @protected
-       */value:function typeForProperty(name){var info=this._properties[name];return info&&info.type}},{key:"observedAttributes",/**
-       * Implements standard custom elements getter to observes the attributes
-       * listed in `properties`.
-       * @suppress {missingProperties} Interfaces in closure do not inherit statics, but classes do
-       */get:function get(){var _this=this;if(!this.hasOwnProperty("__observedAttributes")){Polymer.telemetry.register(this.prototype);var props=this._properties;this.__observedAttributes=props?Object.keys(props).map(function(p){return _this.attributeNameForProperty(p)}):[]}return this.__observedAttributes}},{key:"_properties",get:function get(){if(!this.hasOwnProperty(JSCompiler_renameProperty("__properties",this))){var superCtor=superPropertiesClass(/** @type {PropertiesMixinConstructor} */this);this.__properties=Object.assign({},superCtor&&superCtor._properties,ownProperties(/** @type {PropertiesMixinConstructor} */this))}return this.__properties}}]);return PropertiesMixin}(base);return PropertiesMixin})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var builtCSS=window.ShadyCSS&&window.ShadyCSS.cssBuild;/**
+       */},{key:"typeForProperty",value:function typeForProperty(name){var info=this._properties[name];return info&&info.type}}]);return PropertiesMixin}(base);return PropertiesMixin})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var builtCSS=window.ShadyCSS&&window.ShadyCSS.cssBuild;/**
    * Element class mixin that provides the core API for Polymer's meta-programming
    * features including template stamping, data-binding, attribute deserialization,
    * and property change observation.
@@ -2964,107 +2964,7 @@
      * @mixinClass
      * @unrestricted
      * @implements {Polymer_ElementMixin}
-     */var PolymerElement=/*#__PURE__*/function(_polymerElementBase){babelHelpers.inherits(PolymerElement,_polymerElementBase);var _super=_createSuper(PolymerElement);babelHelpers.createClass(PolymerElement,null,[{key:"_finalizeClass",/**
-       * Override of PropertiesMixin _finalizeClass to create observers and
-       * find the template.
-       * @return {void}
-       * @protected
-       * @override
-       * @suppress {missingProperties} Interfaces in closure do not inherit statics, but classes do
-       */value:function _finalizeClass(){babelHelpers.get(babelHelpers.getPrototypeOf(PolymerElement),"_finalizeClass",this).call(this);var observers=ownObservers(this);if(observers){this.createObservers(observers,this._properties)}this._prepareTemplate()}},{key:"_prepareTemplate",value:function _prepareTemplate(){// note: create "working" template that is finalized at instance time
-var template=/** @type {PolymerElementConstructor} */this.template;if(template){if("string"===typeof template){var t=document.createElement("template");t.innerHTML=template;template=t}else if(!Polymer.legacyOptimizations){template=template.cloneNode(!0)}}this.prototype._template=template}/**
-       * Override of PropertiesChanged createProperties to create accessors
-       * and property effects for all of the properties.
-       * @return {void}
-       * @protected
-       * @override
-       */},{key:"createProperties",value:function createProperties(props){for(var p in props){createPropertyFromConfig(this.prototype,p,props[p],props)}}/**
-       * Creates observers for the given `observers` array.
-       * Leverages `PropertyEffects` to create observers.
-       * @param {Object} observers Array of observer descriptors for
-       *   this class
-       * @param {Object} dynamicFns Object containing keys for any properties
-       *   that are functions and should trigger the effect when the function
-       *   reference is changed
-       * @return {void}
-       * @protected
-       */},{key:"createObservers",value:function createObservers(observers,dynamicFns){for(var proto=this.prototype,i=0;i<observers.length;i++){proto._createMethodObserver(observers[i],dynamicFns)}}/**
-       * Returns the template that will be stamped into this element's shadow root.
-       *
-       * If a `static get is()` getter is defined, the default implementation
-       * will return the first `<template>` in a `dom-module` whose `id`
-       * matches this element's `is`.
-       *
-       * Users may override this getter to return an arbitrary template
-       * (in which case the `is` getter is unnecessary). The template returned
-       * may be either an `HTMLTemplateElement` or a string that will be
-       * automatically parsed into a template.
-       *
-       * Note that when subclassing, if the super class overrode the default
-       * implementation and the subclass would like to provide an alternate
-       * template via a `dom-module`, it should override this getter and
-       * return `Polymer.DomModule.import(this.is, 'template')`.
-       *
-       * If a subclass would like to modify the super class template, it should
-       * clone it rather than modify it in place.  If the getter does expensive
-       * work such as cloning/modifying a template, it should memoize the
-       * template for maximum performance:
-       *
-       *   let memoizedTemplate;
-       *   class MySubClass extends MySuperClass {
-       *     static get template() {
-       *       if (!memoizedTemplate) {
-       *         memoizedTemplate = MySuperClass.template.cloneNode(true);
-       *         let subContent = document.createElement('div');
-       *         subContent.textContent = 'This came from MySubClass';
-       *         memoizedTemplate.content.appendChild(subContent);
-       *       }
-       *       return memoizedTemplate;
-       *     }
-       *   }
-       *
-       * @return {HTMLTemplateElement|string} Template to be stamped
-       */},{key:"template",get:function get(){// Explanation of template-related properties:
-// - constructor.template (this getter): the template for the class.
-//     This can come from the prototype (for legacy elements), from a
-//     dom-module, or from the super class's template (or can be overridden
-//     altogether by the user)
-// - constructor._template: memoized version of constructor.template
-// - prototype._template: working template for the element, which will be
-//     parsed and modified in place. It is a cloned version of
-//     constructor.template, saved in _finalizeClass(). Note that before
-//     this getter is called, for legacy elements this could be from a
-//     _template field on the info object passed to Polymer(), a behavior,
-//     or set in registered(); once the static getter runs, a clone of it
-//     will overwrite it on the prototype as the working template.
-if(!this.hasOwnProperty(JSCompiler_renameProperty("_template",this))){this._template=// If user has put template on prototype (e.g. in legacy via registered
-// callback or info object), prefer that first
-this.prototype.hasOwnProperty(JSCompiler_renameProperty("_template",this.prototype))?this.prototype._template:// Look in dom-module associated with this element's is
-getTemplateFromDomModule(/** @type {PolymerElementConstructor}*/this.is)||// Next look for superclass template (call the super impl this
-// way so that `this` points to the superclass)
-Object.getPrototypeOf(/** @type {PolymerElementConstructor}*/this.prototype).constructor.template}return this._template}/**
-       * Set the template.
-       *
-       * @param {HTMLTemplateElement|string} value Template to set.
-       */,set:function set(value){this._template=value}/**
-       * Path matching the url from which the element was imported.
-       *
-       * This path is used to resolve url's in template style cssText.
-       * The `importPath` property is also set on element instances and can be
-       * used to create bindings relative to the import path.
-       *
-       * For elements defined in ES modules, users should implement
-       * `static get importMeta() { return import.meta; }`, and the default
-       * implementation of `importPath` will  return `import.meta.url`'s path.
-       * For elements defined in HTML imports, this getter will return the path
-       * to the document containing a `dom-module` element matching this
-       * element's static `is` property.
-       *
-       * Note, this path should contain a trailing `/`.
-       *
-       * @return {string} The import path for this element class
-       * @suppress {missingProperties}
-       */},{key:"importPath",get:function get(){if(!this.hasOwnProperty(JSCompiler_renameProperty("_importPath",this))){var meta=this.importMeta;if(meta){this._importPath=Polymer.ResolveUrl.pathFromUrl(meta.url)}else{var module=Polymer.DomModule&&Polymer.DomModule.import(/** @type {PolymerElementConstructor} */this.is);this._importPath=module&&module.assetpath||Object.getPrototypeOf(/** @type {PolymerElementConstructor}*/this.prototype).constructor.importPath}}return this._importPath}}]);function PolymerElement(){var _this;babelHelpers.classCallCheck(this,PolymerElement);_this=_super.call(this);/** @type {HTMLTemplateElement} */_this._template;/** @type {string} */_this._importPath;/** @type {string} */_this.rootPath;/** @type {string} */_this.importPath;/** @type {StampedTemplate | HTMLElement | ShadowRoot} */_this.root;/** @type {!Object<string, !Element>} */_this.$;return _this}/**
+     */var PolymerElement=/*#__PURE__*/function(_polymerElementBase){babelHelpers.inherits(PolymerElement,_polymerElementBase);var _super=_createSuper(PolymerElement);function PolymerElement(){var _this;babelHelpers.classCallCheck(this,PolymerElement);_this=_super.call(this);/** @type {HTMLTemplateElement} */_this._template;/** @type {string} */_this._importPath;/** @type {string} */_this.rootPath;/** @type {string} */_this.importPath;/** @type {StampedTemplate | HTMLElement | ShadowRoot} */_this.root;/** @type {!Object<string, !Element>} */_this.$;return _this}/**
        * Overrides the default `Polymer.PropertyAccessors` to ensure class
        * metaprogramming related to property accessors and effects has
        * completed (calls `finalize`).
@@ -3091,7 +2991,7 @@
        * @param {string} baseURI Base URI to rebase CSS paths against
        * @return {string} The processed CSS text
        * @protected
-       */},{key:"connectedCallback",/**
+       */},{key:"connectedCallback",value:/**
        * Provides a default implementation of the standard Custom Elements
        * `connectedCallback`.
        *
@@ -3101,7 +3001,7 @@
        *
        * @suppress {missingProperties, invalidCasts} Super may or may not implement the callback
        * @return {void}
-       */value:function connectedCallback(){if(window.ShadyCSS&&this._template){window.ShadyCSS.styleElement(/** @type {!HTMLElement} */this)}babelHelpers.get(babelHelpers.getPrototypeOf(PolymerElement.prototype),"connectedCallback",this).call(this)}/**
+       */function connectedCallback(){if(window.ShadyCSS&&this._template){window.ShadyCSS.styleElement(/** @type {!HTMLElement} */this)}babelHelpers.get(babelHelpers.getPrototypeOf(PolymerElement.prototype),"connectedCallback",this).call(this)}/**
        * Stamps the element template.
        *
        * @return {void}
@@ -3172,7 +3072,107 @@
        *
        * @override
        * @suppress {missingProperties} Interfaces in closure do not inherit statics, but classes do
-       */}],[{key:"_processStyleText",value:function _processStyleText(cssText,baseURI){return Polymer.ResolveUrl.resolveCss(cssText,baseURI)}/**
+       */}],[{key:"_finalizeClass",value:/**
+       * Override of PropertiesMixin _finalizeClass to create observers and
+       * find the template.
+       * @return {void}
+       * @protected
+       * @override
+       * @suppress {missingProperties} Interfaces in closure do not inherit statics, but classes do
+       */function _finalizeClass(){babelHelpers.get(babelHelpers.getPrototypeOf(PolymerElement),"_finalizeClass",this).call(this);var observers=ownObservers(this);if(observers){this.createObservers(observers,this._properties)}this._prepareTemplate()}},{key:"_prepareTemplate",value:function _prepareTemplate(){// note: create "working" template that is finalized at instance time
+var template=/** @type {PolymerElementConstructor} */this.template;if(template){if("string"===typeof template){var t=document.createElement("template");t.innerHTML=template;template=t}else if(!Polymer.legacyOptimizations){template=template.cloneNode(!0)}}this.prototype._template=template}/**
+       * Override of PropertiesChanged createProperties to create accessors
+       * and property effects for all of the properties.
+       * @return {void}
+       * @protected
+       * @override
+       */},{key:"createProperties",value:function createProperties(props){for(var p in props){createPropertyFromConfig(this.prototype,p,props[p],props)}}/**
+       * Creates observers for the given `observers` array.
+       * Leverages `PropertyEffects` to create observers.
+       * @param {Object} observers Array of observer descriptors for
+       *   this class
+       * @param {Object} dynamicFns Object containing keys for any properties
+       *   that are functions and should trigger the effect when the function
+       *   reference is changed
+       * @return {void}
+       * @protected
+       */},{key:"createObservers",value:function createObservers(observers,dynamicFns){for(var proto=this.prototype,i=0;i<observers.length;i++){proto._createMethodObserver(observers[i],dynamicFns)}}/**
+       * Returns the template that will be stamped into this element's shadow root.
+       *
+       * If a `static get is()` getter is defined, the default implementation
+       * will return the first `<template>` in a `dom-module` whose `id`
+       * matches this element's `is`.
+       *
+       * Users may override this getter to return an arbitrary template
+       * (in which case the `is` getter is unnecessary). The template returned
+       * may be either an `HTMLTemplateElement` or a string that will be
+       * automatically parsed into a template.
+       *
+       * Note that when subclassing, if the super class overrode the default
+       * implementation and the subclass would like to provide an alternate
+       * template via a `dom-module`, it should override this getter and
+       * return `Polymer.DomModule.import(this.is, 'template')`.
+       *
+       * If a subclass would like to modify the super class template, it should
+       * clone it rather than modify it in place.  If the getter does expensive
+       * work such as cloning/modifying a template, it should memoize the
+       * template for maximum performance:
+       *
+       *   let memoizedTemplate;
+       *   class MySubClass extends MySuperClass {
+       *     static get template() {
+       *       if (!memoizedTemplate) {
+       *         memoizedTemplate = MySuperClass.template.cloneNode(true);
+       *         let subContent = document.createElement('div');
+       *         subContent.textContent = 'This came from MySubClass';
+       *         memoizedTemplate.content.appendChild(subContent);
+       *       }
+       *       return memoizedTemplate;
+       *     }
+       *   }
+       *
+       * @return {HTMLTemplateElement|string} Template to be stamped
+       */},{key:"template",get:function get(){// Explanation of template-related properties:
+// - constructor.template (this getter): the template for the class.
+//     This can come from the prototype (for legacy elements), from a
+//     dom-module, or from the super class's template (or can be overridden
+//     altogether by the user)
+// - constructor._template: memoized version of constructor.template
+// - prototype._template: working template for the element, which will be
+//     parsed and modified in place. It is a cloned version of
+//     constructor.template, saved in _finalizeClass(). Note that before
+//     this getter is called, for legacy elements this could be from a
+//     _template field on the info object passed to Polymer(), a behavior,
+//     or set in registered(); once the static getter runs, a clone of it
+//     will overwrite it on the prototype as the working template.
+if(!this.hasOwnProperty(JSCompiler_renameProperty("_template",this))){this._template=// If user has put template on prototype (e.g. in legacy via registered
+// callback or info object), prefer that first
+this.prototype.hasOwnProperty(JSCompiler_renameProperty("_template",this.prototype))?this.prototype._template:// Look in dom-module associated with this element's is
+getTemplateFromDomModule(/** @type {PolymerElementConstructor}*/this.is)||// Next look for superclass template (call the super impl this
+// way so that `this` points to the superclass)
+Object.getPrototypeOf(/** @type {PolymerElementConstructor}*/this.prototype).constructor.template}return this._template}/**
+       * Set the template.
+       *
+       * @param {HTMLTemplateElement|string} value Template to set.
+       */,set:function set(value){this._template=value}/**
+       * Path matching the url from which the element was imported.
+       *
+       * This path is used to resolve url's in template style cssText.
+       * The `importPath` property is also set on element instances and can be
+       * used to create bindings relative to the import path.
+       *
+       * For elements defined in ES modules, users should implement
+       * `static get importMeta() { return import.meta; }`, and the default
+       * implementation of `importPath` will  return `import.meta.url`'s path.
+       * For elements defined in HTML imports, this getter will return the path
+       * to the document containing a `dom-module` element matching this
+       * element's static `is` property.
+       *
+       * Note, this path should contain a trailing `/`.
+       *
+       * @return {string} The import path for this element class
+       * @suppress {missingProperties}
+       */},{key:"importPath",get:function get(){if(!this.hasOwnProperty(JSCompiler_renameProperty("_importPath",this))){var meta=this.importMeta;if(meta){this._importPath=Polymer.ResolveUrl.pathFromUrl(meta.url)}else{var module=Polymer.DomModule&&Polymer.DomModule.import(/** @type {PolymerElementConstructor} */this.is);this._importPath=module&&module.assetpath||Object.getPrototypeOf(/** @type {PolymerElementConstructor}*/this.prototype).constructor.importPath}}return this._importPath}},{key:"_processStyleText",value:function _processStyleText(cssText,baseURI){return Polymer.ResolveUrl.resolveCss(cssText,baseURI)}/**
       * Configures an element `proto` to function with a given `template`.
       * The element name `is` and extends `ext` must be specified for ShadyCSS
       * style scoping.
@@ -3197,7 +3197,7 @@
    * @param {Object=} props Bag of custom property key/values to
    *   apply to the document.
    * @return {void}
-   */Polymer.updateStyles=function(props){if(window.ShadyCSS){window.ShadyCSS.styleDocument(props)}}})();</script><script>(function(){'use strict';/**
+   */Polymer.updateStyles=function(props){if(window.ShadyCSS){window.ShadyCSS.styleDocument(props)}}})();</script><script>(function(){"use strict";/**
    * @summary Collapse multiple callbacks into one invocation after a timer.
    * @memberof Polymer
    */var Debouncer=/*#__PURE__*/function(){function Debouncer(){babelHelpers.classCallCheck(this,Debouncer);this._asyncModule=null;this._callback=null;this._timer=null}/**
@@ -3267,7 +3267,7 @@
    * @return {void}
    */Polymer.enqueueDebouncer=function(debouncer){debouncerQueue.add(debouncer)};Polymer.flushDebouncers=function(){var didFlush=!!debouncerQueue.size;// If new debouncers are added while flushing, Set.forEach will ensure
 // newly added ones are also flushed
-debouncerQueue.forEach(function(debouncer){try{debouncer.flush()}catch(e){setTimeout(function(){throw e})}});return didFlush}})();</script><script>(function(){'use strict';// detect native touch action support
+debouncerQueue.forEach(function(debouncer){try{debouncer.flush()}catch(e){setTimeout(function(){throw e})}});return didFlush}})();</script><script>(function(){"use strict";// detect native touch action support
 var HAS_NATIVE_TA="string"===typeof document.head.style.touchAction,GESTURE_KEY="__polymerGestures",HANDLED_OBJ="__polymerGesturesHandled",TOUCH_ACTION="__polymerGesturesTouchAction",TAP_DISTANCE=25,TRACK_DISTANCE=5,TRACK_LENGTH=2,MOUSE_TIMEOUT=2500,MOUSE_EVENTS=["mousedown","mousemove","mouseup","click"],MOUSE_WHICH_TO_BUTTONS=[0,1,4,2],MOUSE_HAS_BUTTONS=function(){try{return 1===new MouseEvent("test",{buttons:1}).buttons}catch(e){return!1}}();/**
    * @param {string} name Possible mouse event name
    * @return {boolean} true if mouse event, false if not
@@ -3557,7 +3557,7 @@
      * @return {void}
      */forward:function forward(e,preventer){var dx=Math.abs(e.clientX-this.info.x),dy=Math.abs(e.clientY-this.info.y),t=Gestures._findOriginalTarget(/** @type {Event} */preventer||e);if(!t||canBeDisabled[/** @type {!HTMLElement} */t.localName]&&t.hasAttribute("disabled")){return}// dx,dy can be NaN if `click` has been simulated and there was no `down` for `start`
 if(isNaN(dx)||isNaN(dy)||dx<=TAP_DISTANCE&&dy<=TAP_DISTANCE||isSyntheticClick(e)){// prevent taps from being generated if an event has canceled them
-if(!this.info.prevent){Gestures._fire(t,"tap",{x:e.clientX,y:e.clientY,sourceEvent:e,preventer:preventer})}}}});/* eslint-enable valid-jsdoc */ /** @deprecated */Gestures.findOriginalTarget=Gestures._findOriginalTarget;/** @deprecated */Gestures.add=Gestures.addListener;/** @deprecated */Gestures.remove=Gestures.removeListener;Polymer.Gestures=Gestures})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';/**
+if(!this.info.prevent){Gestures._fire(t,"tap",{x:e.clientX,y:e.clientY,sourceEvent:e,preventer:preventer})}}}});/* eslint-enable valid-jsdoc */ /** @deprecated */Gestures.findOriginalTarget=Gestures._findOriginalTarget;/** @deprecated */Gestures.add=Gestures.addListener;/** @deprecated */Gestures.remove=Gestures.removeListener;Polymer.Gestures=Gestures})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";/**
    * @const {Polymer.Gestures}
    */var gestures=Polymer.Gestures;/**
    * Element class mixin that provides API for adding Polymer's cross-platform
@@ -3577,21 +3577,21 @@
      * @polymer
      * @mixinClass
      * @implements {Polymer_GestureEventListeners}
-     */var GestureEventListeners=/*#__PURE__*/function(_superClass){babelHelpers.inherits(GestureEventListeners,_superClass);var _super=_createSuper(GestureEventListeners);function GestureEventListeners(){babelHelpers.classCallCheck(this,GestureEventListeners);return _super.apply(this,arguments)}babelHelpers.createClass(GestureEventListeners,[{key:"_addEventListenerToNode",/**
+     */var GestureEventListeners=/*#__PURE__*/function(_superClass){babelHelpers.inherits(GestureEventListeners,_superClass);var _super=_createSuper(GestureEventListeners);function GestureEventListeners(){babelHelpers.classCallCheck(this,GestureEventListeners);return _super.apply(this,arguments)}babelHelpers.createClass(GestureEventListeners,[{key:"_addEventListenerToNode",value:/**
        * Add the event listener to the node if it is a gestures event.
        *
        * @param {!Node} node Node to add event listener to
        * @param {string} eventName Name of event
        * @param {function(!Event):void} handler Listener function to add
        * @return {void}
-       */value:function _addEventListenerToNode(node,eventName,handler){if(!gestures.addListener(node,eventName,handler)){babelHelpers.get(babelHelpers.getPrototypeOf(GestureEventListeners.prototype),"_addEventListenerToNode",this).call(this,node,eventName,handler)}}/**
+       */function _addEventListenerToNode(node,eventName,handler){if(!gestures.addListener(node,eventName,handler)){babelHelpers.get(babelHelpers.getPrototypeOf(GestureEventListeners.prototype),"_addEventListenerToNode",this).call(this,node,eventName,handler)}}/**
        * Remove the event listener to the node if it is a gestures event.
        *
        * @param {!Node} node Node to remove event listener from
        * @param {string} eventName Name of event
        * @param {function(!Event):void} handler Listener function to remove
        * @return {void}
-       */},{key:"_removeEventListenerFromNode",value:function _removeEventListenerFromNode(node,eventName,handler){if(!gestures.removeListener(node,eventName,handler)){babelHelpers.get(babelHelpers.getPrototypeOf(GestureEventListeners.prototype),"_removeEventListenerFromNode",this).call(this,node,eventName,handler)}}}]);return GestureEventListeners}(superClass);return GestureEventListeners})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var HOST_DIR=/:host\(:dir\((ltr|rtl)\)\)/g,HOST_DIR_REPLACMENT=":host([dir=\"$1\"])",EL_DIR=/([\s\w-#\.\[\]\*]*):dir\((ltr|rtl)\)/g,EL_DIR_REPLACMENT=":host([dir=\"$2\"]) $1",DIR_CHECK=/:dir\((?:ltr|rtl)\)/,SHIM_SHADOW=!!(window.ShadyDOM&&window.ShadyDOM.inUse),DIR_INSTANCES=[],observer=null,DOCUMENT_DIR="";function getRTL(){DOCUMENT_DIR=document.documentElement.getAttribute("dir")}/**
+       */},{key:"_removeEventListenerFromNode",value:function _removeEventListenerFromNode(node,eventName,handler){if(!gestures.removeListener(node,eventName,handler)){babelHelpers.get(babelHelpers.getPrototypeOf(GestureEventListeners.prototype),"_removeEventListenerFromNode",this).call(this,node,eventName,handler)}}}]);return GestureEventListeners}(superClass);return GestureEventListeners})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var HOST_DIR=/:host\(:dir\((ltr|rtl)\)\)/g,HOST_DIR_REPLACMENT=":host([dir=\"$1\"])",EL_DIR=/([\s\w-#\.\[\]\*]*):dir\((ltr|rtl)\)/g,EL_DIR_REPLACMENT=":host([dir=\"$2\"]) $1",DIR_CHECK=/:dir\((?:ltr|rtl)\)/,SHIM_SHADOW=!!(window.ShadyDOM&&window.ShadyDOM.inUse),DIR_INSTANCES=[],observer=null,DOCUMENT_DIR="";function getRTL(){DOCUMENT_DIR=document.documentElement.getAttribute("dir")}/**
      * @param {!Polymer_DirMixin} instance Instance to set RTL status on
      */function setRTL(instance){if(!instance.__autoDirOptOut){var el=/** @type {!HTMLElement} */instance;el.setAttribute("dir",DOCUMENT_DIR)}}function updateDirection(){getRTL();DOCUMENT_DIR=document.documentElement.getAttribute("dir");for(var i=0;i<DIR_INSTANCES.length;i++){setRTL(DIR_INSTANCES[i])}}function takeRecords(){if(observer&&observer.takeRecords().length){updateDirection()}}/**
      * Element class mixin that allows elements to use the `:dir` CSS Selector to have
@@ -3618,15 +3618,7 @@
        * @extends {base}
        * @implements {Polymer_PropertyAccessors}
        * @private
-       */var elementBase=Polymer.PropertyAccessors(base),Dir=/*#__PURE__*/function(_elementBase){babelHelpers.inherits(Dir,_elementBase);var _super=_createSuper(Dir);babelHelpers.createClass(Dir,null,[{key:"_processStyleText",/**
-         * @override
-         * @suppress {missingProperties} Interfaces in closure do not inherit statics, but classes do
-         */value:function _processStyleText(cssText,baseURI){cssText=babelHelpers.get(babelHelpers.getPrototypeOf(Dir),"_processStyleText",this).call(this,cssText,baseURI);if(!SHIM_SHADOW&&DIR_CHECK.test(cssText)){cssText=this._replaceDirInCssText(cssText);this.__activateDir=!0}return cssText}/**
-         * Replace `:dir` in the given CSS text
-         *
-         * @param {string} text CSS text to replace DIR
-         * @return {string} Modified CSS
-         */},{key:"_replaceDirInCssText",value:function _replaceDirInCssText(text){var replacedText=text;replacedText=replacedText.replace(HOST_DIR,HOST_DIR_REPLACMENT);replacedText=replacedText.replace(EL_DIR,EL_DIR_REPLACMENT);return replacedText}}]);function Dir(){var _this;babelHelpers.classCallCheck(this,Dir);_this=_super.call(this);/** @type {boolean} */_this.__autoDirOptOut=!1;return _this}/**
+       */var elementBase=Polymer.PropertyAccessors(base),Dir=/*#__PURE__*/function(_elementBase){babelHelpers.inherits(Dir,_elementBase);var _super=_createSuper(Dir);function Dir(){var _this;babelHelpers.classCallCheck(this,Dir);_this=_super.call(this);/** @type {boolean} */_this.__autoDirOptOut=!1;return _this}/**
          * @suppress {invalidCasts} Closure doesn't understand that `this` is an HTMLElement
          * @return {void}
          */babelHelpers.createClass(Dir,[{key:"ready",value:function ready(){babelHelpers.get(babelHelpers.getPrototypeOf(Dir.prototype),"ready",this).call(this);this.__autoDirOptOut=/** @type {!HTMLElement} */this.hasAttribute("dir")}/**
@@ -3635,11 +3627,19 @@
          */},{key:"connectedCallback",value:function connectedCallback(){if(elementBase.prototype.connectedCallback){babelHelpers.get(babelHelpers.getPrototypeOf(Dir.prototype),"connectedCallback",this).call(this)}if(this.constructor.__activateDir){takeRecords();DIR_INSTANCES.push(this);setRTL(this)}}/**
          * @suppress {missingProperties} If it exists on elementBase, it can be super'd
          * @return {void}
-         */},{key:"disconnectedCallback",value:function disconnectedCallback(){if(elementBase.prototype.disconnectedCallback){babelHelpers.get(babelHelpers.getPrototypeOf(Dir.prototype),"disconnectedCallback",this).call(this)}if(this.constructor.__activateDir){var idx=DIR_INSTANCES.indexOf(this);if(-1<idx){DIR_INSTANCES.splice(idx,1)}}}}]);return Dir}(elementBase);/**
+         */},{key:"disconnectedCallback",value:function disconnectedCallback(){if(elementBase.prototype.disconnectedCallback){babelHelpers.get(babelHelpers.getPrototypeOf(Dir.prototype),"disconnectedCallback",this).call(this)}if(this.constructor.__activateDir){var idx=DIR_INSTANCES.indexOf(this);if(-1<idx){DIR_INSTANCES.splice(idx,1)}}}}],[{key:"_processStyleText",value:/**
+         * @override
+         * @suppress {missingProperties} Interfaces in closure do not inherit statics, but classes do
+         */function _processStyleText(cssText,baseURI){cssText=babelHelpers.get(babelHelpers.getPrototypeOf(Dir),"_processStyleText",this).call(this,cssText,baseURI);if(!SHIM_SHADOW&&DIR_CHECK.test(cssText)){cssText=this._replaceDirInCssText(cssText);this.__activateDir=!0}return cssText}/**
+         * Replace `:dir` in the given CSS text
+         *
+         * @param {string} text CSS text to replace DIR
+         * @return {string} Modified CSS
+         */},{key:"_replaceDirInCssText",value:function _replaceDirInCssText(text){var replacedText=text;replacedText=replacedText.replace(HOST_DIR,HOST_DIR_REPLACMENT);replacedText=replacedText.replace(EL_DIR,EL_DIR_REPLACMENT);return replacedText}}]);return Dir}(elementBase);/**
        * @polymer
        * @mixinClass
        * @implements {Polymer_DirMixin}
-       */Dir.__activateDir=!1;return Dir})})();</script><script>(function(){'use strict';// run a callback when HTMLImports are ready or immediately if
+       */Dir.__activateDir=!1;return Dir})})();</script><script>(function(){"use strict";// run a callback when HTMLImports are ready or immediately if
 // this api is not available.
 function whenImportsReady(cb){if(window.HTMLImports){HTMLImports.whenReady(cb)}else{cb()}}/**
    * Convenience method for importing an HTML document imperatively.
@@ -3671,7 +3671,7 @@
 // called.
 if(link.parentNode){link.parentNode.removeChild(link)}if(onerror){whenImportsReady(function(){onerror(event)})}};link.addEventListener("load",loadListener);link.addEventListener("error",errorListener);if(null==link.parentNode){document.head.appendChild(link);// if the link already loaded, dispatch a fake load event
 // so that listeners are called and get a proper event argument.
-}else if(link.__dynamicImportLoaded){link.dispatchEvent(new Event("load"))}return link}})();</script><script>(function(){'use strict';var scheduled=!1,beforeRenderQueue=[],afterRenderQueue=[];function schedule(){scheduled=!0;// before next render
+}else if(link.__dynamicImportLoaded){link.dispatchEvent(new Event("load"))}return link}})();</script><script>(function(){"use strict";var scheduled=!1,beforeRenderQueue=[],afterRenderQueue=[];function schedule(){scheduled=!0;// before next render
 requestAnimationFrame(function(){scheduled=!1;flushQueue(beforeRenderQueue);// after the render
 setTimeout(function(){runQueue(afterRenderQueue)})})}function flushQueue(queue){while(queue.length){callMethod(queue.shift())}}function runQueue(queue){for(var i=0,l=queue.length;i<l;i++){callMethod(queue.shift())}}function callMethod(info){var context=info[0],callback=info[1],args=info[2];try{callback.apply(context,args)}catch(e){setTimeout(function(){throw e})}}function flush(){while(beforeRenderQueue.length||afterRenderQueue.length){flushQueue(beforeRenderQueue);flushQueue(afterRenderQueue)}scheduled=!1}/**
    * Module for scheduling flushable pre-render and post-render tasks.
@@ -3714,8 +3714,8 @@
      *
      * @memberof Polymer.RenderStatus
      * @return {void}
-     */flush:flush}})();</script><script>(function(){'use strict';// unresolved
-function resolve(){document.body.removeAttribute("unresolved")}if(window.WebComponents){window.addEventListener("WebComponentsReady",resolve)}else{if("interactive"===document.readyState||"complete"===document.readyState){resolve()}else{window.addEventListener("DOMContentLoaded",resolve)}}})();</script><script>(function(){'use strict';function newSplice(index,removed,addedCount){return{index:index,removed:removed,addedCount:addedCount}}var EDIT_LEAVE=0,EDIT_UPDATE=1,EDIT_ADD=2,EDIT_DELETE=3;// Note: This function is *based* on the computation of the Levenshtein
+     */flush:flush}})();</script><script>(function(){"use strict";// unresolved
+function resolve(){document.body.removeAttribute("unresolved")}if(window.WebComponents){window.addEventListener("WebComponentsReady",resolve)}else{if("interactive"===document.readyState||"complete"===document.readyState){resolve()}else{window.addEventListener("DOMContentLoaded",resolve)}}})();</script><script>(function(){"use strict";function newSplice(index,removed,addedCount){return{index:index,removed:removed,addedCount:addedCount}}var EDIT_LEAVE=0,EDIT_UPDATE=1,EDIT_ADD=2,EDIT_DELETE=3;// Note: This function is *based* on the computation of the Levenshtein
 // "edit" distance. The one change is that "updates" are treated as two
 // edits - not one. With Array splices, an update is really a delete
 // followed by an add. By retaining this, we optimize for "keeping" the
@@ -3729,7 +3729,7 @@
 function calcEditDistances(current,currentStart,currentEnd,old,oldStart,oldEnd){// "Deletion" columns
 // "Addition" rows. Initialize null column.
 for(var rowCount=oldEnd-oldStart+1,columnCount=currentEnd-currentStart+1,distances=Array(rowCount),i=0;i<rowCount;i++){distances[i]=Array(columnCount);distances[i][0]=i}// Initialize null row
-for(var j=0;j<columnCount;j++){distances[0][j]=j}for(var _i=1;_i<rowCount;_i++){for(var _j=1;_j<columnCount;_j++){if(equals(current[currentStart+_j-1],old[oldStart+_i-1]))distances[_i][_j]=distances[_i-1][_j-1];else{var north=distances[_i-1][_j]+1,west=distances[_i][_j-1]+1;distances[_i][_j]=north<west?north:west}}}return distances}// This starts at the final weight, and walks "backward" by finding
+for(var j=0;j<columnCount;j++)distances[0][j]=j;for(var _i=1;_i<rowCount;_i++){for(var _j=1;_j<columnCount;_j++){if(equals(current[currentStart+_j-1],old[oldStart+_i-1]))distances[_i][_j]=distances[_i-1][_j-1];else{var north=distances[_i-1][_j]+1,west=distances[_i][_j-1]+1;distances[_i][_j]=north<west?north:west}}}return distances}// This starts at the final weight, and walks "backward" by finding
 // the minimum previous weight recursively until the origin of the weight
 // matrix.
 function spliceOperationsFromEditDistances(distances){var i=distances.length-1,j=distances[0].length-1,current=distances[i][j],edits=[];while(0<i||0<j){if(0==i){edits.push(EDIT_ADD);j--;continue}if(0==j){edits.push(EDIT_DELETE);i--;continue}var northWest=distances[i-1][j-1],west=distances[i-1][j],north=distances[i][j-1],min=void 0;if(west<north)min=west<northWest?west:northWest;else min=north<northWest?north:northWest;if(min==northWest){if(northWest==current){edits.push(EDIT_LEAVE)}else{edits.push(EDIT_UPDATE);current=northWest}i--;j--}else if(min==west){edits.push(EDIT_DELETE);i--;current=west}else{edits.push(EDIT_ADD);j--;current=north}}edits.reverse();return edits}/**
@@ -3770,7 +3770,7 @@
    * contains: `index` the location where the splice occurred; `removed`
    * the array of removed items from this location; `addedCount` the number
    * of items added at this location.
-   */function calcSplices(current,currentStart,currentEnd,old,oldStart,oldEnd){var prefixCount=0,suffixCount=0,splice,minLength=Math.min(currentEnd-currentStart,oldEnd-oldStart);if(0==currentStart&&0==oldStart)prefixCount=sharedPrefix(current,old,minLength);if(currentEnd==current.length&&oldEnd==old.length)suffixCount=sharedSuffix(current,old,minLength-prefixCount);currentStart+=prefixCount;oldStart+=prefixCount;currentEnd-=suffixCount;oldEnd-=suffixCount;if(0==currentEnd-currentStart&&0==oldEnd-oldStart)return[];if(currentStart==currentEnd){splice=newSplice(currentStart,[],0);while(oldStart<oldEnd){splice.removed.push(old[oldStart++])}return[splice]}else if(oldStart==oldEnd)return[newSplice(currentStart,[],currentEnd-currentStart)];var ops=spliceOperationsFromEditDistances(calcEditDistances(current,currentStart,currentEnd,old,oldStart,oldEnd));splice=void 0;for(var splices=[],index=currentStart,oldIndex=oldStart,i=0;i<ops.length;i++){switch(ops[i]){case EDIT_LEAVE:if(splice){splices.push(splice);splice=void 0}index++;oldIndex++;break;case EDIT_UPDATE:if(!splice)splice=newSplice(index,[],0);splice.addedCount++;index++;splice.removed.push(old[oldIndex]);oldIndex++;break;case EDIT_ADD:if(!splice)splice=newSplice(index,[],0);splice.addedCount++;index++;break;case EDIT_DELETE:if(!splice)splice=newSplice(index,[],0);splice.removed.push(old[oldIndex]);oldIndex++;break;}}if(splice){splices.push(splice)}return splices}function sharedPrefix(current,old,searchLength){for(var i=0;i<searchLength;i++){if(!equals(current[i],old[i]))return i}return searchLength}function sharedSuffix(current,old,searchLength){var index1=current.length,index2=old.length,count=0;while(count<searchLength&&equals(current[--index1],old[--index2])){count++}return count}function calculateSplices(current,previous){return calcSplices(current,0,current.length,previous,0,previous.length)}function equals(currentValue,previousValue){return currentValue===previousValue}/**
+   */function calcSplices(current,currentStart,currentEnd,old,oldStart,oldEnd){var prefixCount=0,suffixCount=0,splice,minLength=Math.min(currentEnd-currentStart,oldEnd-oldStart);if(0==currentStart&&0==oldStart)prefixCount=sharedPrefix(current,old,minLength);if(currentEnd==current.length&&oldEnd==old.length)suffixCount=sharedSuffix(current,old,minLength-prefixCount);currentStart+=prefixCount;oldStart+=prefixCount;currentEnd-=suffixCount;oldEnd-=suffixCount;if(0==currentEnd-currentStart&&0==oldEnd-oldStart)return[];if(currentStart==currentEnd){splice=newSplice(currentStart,[],0);while(oldStart<oldEnd)splice.removed.push(old[oldStart++]);return[splice]}else if(oldStart==oldEnd)return[newSplice(currentStart,[],currentEnd-currentStart)];var ops=spliceOperationsFromEditDistances(calcEditDistances(current,currentStart,currentEnd,old,oldStart,oldEnd));splice=void 0;for(var splices=[],index=currentStart,oldIndex=oldStart,i=0;i<ops.length;i++){switch(ops[i]){case EDIT_LEAVE:if(splice){splices.push(splice);splice=void 0}index++;oldIndex++;break;case EDIT_UPDATE:if(!splice)splice=newSplice(index,[],0);splice.addedCount++;index++;splice.removed.push(old[oldIndex]);oldIndex++;break;case EDIT_ADD:if(!splice)splice=newSplice(index,[],0);splice.addedCount++;index++;break;case EDIT_DELETE:if(!splice)splice=newSplice(index,[],0);splice.removed.push(old[oldIndex]);oldIndex++;break;}}if(splice){splices.push(splice)}return splices}function sharedPrefix(current,old,searchLength){for(var i=0;i<searchLength;i++)if(!equals(current[i],old[i]))return i;return searchLength}function sharedSuffix(current,old,searchLength){var index1=current.length,index2=old.length,count=0;while(count<searchLength&&equals(current[--index1],old[--index2]))count++;return count}function calculateSplices(current,previous){return calcSplices(current,0,current.length,previous,0,previous.length)}function equals(currentValue,previousValue){return currentValue===previousValue}/**
    * @namespace
    * @memberof Polymer
    * @summary Module that provides utilities for diffing arrays.
@@ -3805,7 +3805,7 @@
      * contains: `index` the location where the splice occurred; `removed`
      * the array of removed items from this location; `addedCount` the number
      * of items added at this location.
-     */calculateSplices:calculateSplices}})();</script><script>(function(){'use strict';/**
+     */calculateSplices:calculateSplices}})();</script><script>(function(){"use strict";/**
    * Returns true if `node` is a slot element
    * @param {Node} node Node to test.
    * @return {boolean} Returns true if the given `node` is a slot
@@ -3851,24 +3851,11 @@
    * @memberof Polymer
    * @summary Class that listens for changes (additions or removals) to
    * "flattened nodes" on a given `node`.
-   */var FlattenedNodesObserver=/*#__PURE__*/function(){babelHelpers.createClass(FlattenedNodesObserver,null,[{key:"getFlattenedNodes",/**
-     * Returns the list of flattened nodes for the given `node`.
-     * This list consists of a node's children and, for any children
-     * that are `<slot>` elements, the expanded flattened list of `assignedNodes`.
-     * For example, if the observed node has children `<a></a><slot></slot><b></b>`
-     * and the `<slot>` has one `<div>` assigned to it, then the flattened
-     * nodes list is `<a></a><div></div><b></b>`. If the `<slot>` has other
-     * `<slot>` elements assigned to it, these are flattened as well.
-     *
-     * @param {HTMLElement|HTMLSlotElement} node The node for which to return the list of flattened nodes.
-     * @return {Array} The list of flattened nodes for the given `node`.
-    */value:function getFlattenedNodes(node){if(isSlot(node)){node=/** @type {HTMLSlotElement} */node;// eslint-disable-line no-self-assign
-return node.assignedNodes({flatten:!0})}else{return Array.from(node.childNodes).map(function(node){if(isSlot(node)){node=/** @type {HTMLSlotElement} */node;// eslint-disable-line no-self-assign
-return node.assignedNodes({flatten:!0})}else{return[node]}}).reduce(function(a,b){return a.concat(b)},[])}}/**
+   */var FlattenedNodesObserver=/*#__PURE__*/function(){/**
      * @param {Element} target Node on which to listen for changes.
      * @param {?function(!Element, { target: !Element, addedNodes: !Array<!Element>, removedNodes: !Array<!Element> }):void} callback Function called when there are additions
      * or removals from the target's list of flattened nodes.
-    */}]);function FlattenedNodesObserver(target,callback){var _this=this;babelHelpers.classCallCheck(this,FlattenedNodesObserver);/**
+    */function FlattenedNodesObserver(target,callback){var _this=this;babelHelpers.classCallCheck(this,FlattenedNodesObserver);/**
        * @type {MutationObserver}
        * @private
        */this._shadyChildrenObserver=null;/**
@@ -3922,14 +3909,27 @@
      * @param {!Array<Element|Node>|!NodeList<Node>} nodeList Nodes that could change
      * @return {void}
      * @private
-     */},{key:"_unlistenSlots",value:function _unlistenSlots(nodeList){for(var i=0,n;i<nodeList.length;i++){n=nodeList[i];if(isSlot(n)){n.removeEventListener("slotchange",this._boundSchedule)}}}}]);return FlattenedNodesObserver}();Polymer.FlattenedNodesObserver=FlattenedNodesObserver})();</script><script>(function(){'use strict';/**
+     */},{key:"_unlistenSlots",value:function _unlistenSlots(nodeList){for(var i=0,n;i<nodeList.length;i++){n=nodeList[i];if(isSlot(n)){n.removeEventListener("slotchange",this._boundSchedule)}}}}],[{key:"getFlattenedNodes",value:/**
+     * Returns the list of flattened nodes for the given `node`.
+     * This list consists of a node's children and, for any children
+     * that are `<slot>` elements, the expanded flattened list of `assignedNodes`.
+     * For example, if the observed node has children `<a></a><slot></slot><b></b>`
+     * and the `<slot>` has one `<div>` assigned to it, then the flattened
+     * nodes list is `<a></a><div></div><b></b>`. If the `<slot>` has other
+     * `<slot>` elements assigned to it, these are flattened as well.
+     *
+     * @param {HTMLElement|HTMLSlotElement} node The node for which to return the list of flattened nodes.
+     * @return {Array} The list of flattened nodes for the given `node`.
+    */function getFlattenedNodes(node){if(isSlot(node)){node=/** @type {HTMLSlotElement} */node;// eslint-disable-line no-self-assign
+return node.assignedNodes({flatten:!0})}else{return Array.from(node.childNodes).map(function(node){if(isSlot(node)){node=/** @type {HTMLSlotElement} */node;// eslint-disable-line no-self-assign
+return node.assignedNodes({flatten:!0})}else{return[node]}}).reduce(function(a,b){return a.concat(b)},[])}}}]);return FlattenedNodesObserver}();Polymer.FlattenedNodesObserver=FlattenedNodesObserver})();</script><script>(function(){"use strict";/**
    * Forces several classes of asynchronously queued tasks to flush:
    * - Debouncers added via `enqueueDebouncer`
    * - ShadyDOM distribution
    *
    * @memberof Polymer
    * @return {void}
-   */Polymer.flush=function(){var shadyDOM,debouncers;do{shadyDOM=window.ShadyDOM&&ShadyDOM.flush();if(window.ShadyCSS&&window.ShadyCSS.ScopingShim){window.ShadyCSS.ScopingShim.flush()}debouncers=Polymer.flushDebouncers()}while(shadyDOM||debouncers)}})();</script><script>(function(){'use strict';var p=Element.prototype,normalizedMatchesSelector=p.matches||p.matchesSelector||p.mozMatchesSelector||p.msMatchesSelector||p.oMatchesSelector||p.webkitMatchesSelector,matchesSelector=function matchesSelector(node,selector){return normalizedMatchesSelector.call(node,selector)},DomApi=/*#__PURE__*/function(){/**
+   */Polymer.flush=function(){var shadyDOM,debouncers;do{shadyDOM=window.ShadyDOM&&ShadyDOM.flush();if(window.ShadyCSS&&window.ShadyCSS.ScopingShim){window.ShadyCSS.ScopingShim.flush()}debouncers=Polymer.flushDebouncers()}while(shadyDOM||debouncers)}})();</script><script>(function(){"use strict";var p=Element.prototype,normalizedMatchesSelector=p.matches||p.matchesSelector||p.mozMatchesSelector||p.msMatchesSelector||p.oMatchesSelector||p.webkitMatchesSelector,matchesSelector=function matchesSelector(node,selector){return normalizedMatchesSelector.call(node,selector)},DomApi=/*#__PURE__*/function(){/**
      * @param {Node} node Node for which to create a Polymer.dom helper object.
      */function DomApi(node){babelHelpers.classCallCheck(this,DomApi);this.node=node}/**
      * Returns an instance of `Polymer.FlattenedNodesObserver` that
@@ -3996,7 +3996,7 @@
      * @return {Node|undefined} Currently focused element
      */},{key:"activeElement",get:function get(){var node=this.node;return node._activeElement!==void 0?node._activeElement:node.activeElement}}]);return DomApi}();/**
    * @const {function(this:Node, string): boolean}
-   */function forwardMethods(proto,methods){for(var _loop=function _loop(i){var method=methods[i];/* eslint-disable valid-jsdoc */proto[method]=/** @this {DomApi} */function(){return this.node[method].apply(this.node,arguments)};/* eslint-enable */},i=0;i<methods.length;i++){_loop(i)}}function forwardReadOnlyProperties(proto,properties){for(var _loop2=function _loop2(i){var name=properties[i];Object.defineProperty(proto,name,{get:function get(){var domApi=/** @type {DomApi} */this;return domApi.node[name]},configurable:!0})},i=0;i<properties.length;i++){_loop2(i)}}function forwardProperties(proto,properties){for(var _loop3=function _loop3(i){var name=properties[i];Object.defineProperty(proto,name,{get:function get(){var domApi=/** @type {DomApi} */this;return domApi.node[name]},set:function set(value){/** @type {DomApi} */this.node[name]=value},configurable:!0})},i=0;i<properties.length;i++){_loop3(i)}}forwardMethods(DomApi.prototype,["cloneNode","appendChild","insertBefore","removeChild","replaceChild","setAttribute","removeAttribute","querySelector","querySelectorAll"]);forwardReadOnlyProperties(DomApi.prototype,["parentNode","firstChild","lastChild","nextSibling","previousSibling","firstElementChild","lastElementChild","nextElementSibling","previousElementSibling","childNodes","children","classList"]);forwardProperties(DomApi.prototype,["textContent","innerHTML"]);/**
+   */function forwardMethods(proto,methods){for(var _loop=function _loop(){var method=methods[i];/* eslint-disable valid-jsdoc */proto[method]=/** @this {DomApi} */function(){return this.node[method].apply(this.node,arguments)};/* eslint-enable */},i=0;i<methods.length;i++){_loop()}}function forwardReadOnlyProperties(proto,properties){for(var _loop2=function _loop2(){var name=properties[i];Object.defineProperty(proto,name,{get:function get(){var domApi=/** @type {DomApi} */this;return domApi.node[name]},configurable:!0})},i=0;i<properties.length;i++){_loop2()}}function forwardProperties(proto,properties){for(var _loop3=function _loop3(){var name=properties[i];Object.defineProperty(proto,name,{get:function get(){var domApi=/** @type {DomApi} */this;return domApi.node[name]},set:function set(value){/** @type {DomApi} */this.node[name]=value},configurable:!0})},i=0;i<properties.length;i++){_loop3()}}forwardMethods(DomApi.prototype,["cloneNode","appendChild","insertBefore","removeChild","replaceChild","setAttribute","removeAttribute","querySelector","querySelectorAll"]);forwardReadOnlyProperties(DomApi.prototype,["parentNode","firstChild","lastChild","nextSibling","previousSibling","firstElementChild","lastElementChild","nextElementSibling","previousElementSibling","childNodes","children","classList"]);forwardProperties(DomApi.prototype,["textContent","innerHTML"]);/**
    * Event API wrapper class returned from `Polymer.dom.(target)` when
    * `target` is an `Event`.
    */var EventApi=/*#__PURE__*/function(){function EventApi(event){babelHelpers.classCallCheck(this,EventApi);this.event=event}/**
@@ -4079,7 +4079,7 @@
    *
    * @memberof Polymer.dom
    * @param {!Polymer.Debouncer} debouncer Debouncer to enqueue
-   */Polymer.dom.addDebouncer=Polymer.enqueueDebouncer})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var styleInterface=window.ShadyCSS;/**
+   */Polymer.dom.addDebouncer=Polymer.enqueueDebouncer})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var styleInterface=window.ShadyCSS;/**
    * Element class mixin that provides Polymer's "legacy" API intended to be
    * backward-compatible to the greatest extent possible with the API
    * found on the Polymer 1.x `Polymer.Base` prototype applied to all elements
@@ -4107,11 +4107,11 @@
        * @return {!Object} The `import.meta` object set on the prototype
        * @suppress {missingProperties} `this` is always in the instance in
        *  closure for some reason even in a static method, rather than the class
-       */babelHelpers.createClass(LegacyElement,[{key:"created",/**
+       */babelHelpers.createClass(LegacyElement,[{key:"created",value:/**
        * Legacy callback called during the `constructor`, for overriding
        * by the user.
        * @return {void}
-       */value:function created(){}/**
+       */function created(){}/**
        * Provides an implementation of `connectedCallback`
        * which adds Polymer legacy API's `attached` method.
        * @return {void}
@@ -4324,12 +4324,12 @@
        * is contained. This is a shorthand for
        * `this.getRootNode().host`.
        * @this {Element}
-       */},{key:"distributeContent",/**
+       */},{key:"domHost",get:function get(){var root=this.getRootNode();return babelHelpers.instanceof(root,DocumentFragment)?/** @type {ShadowRoot} */root.host:root}/**
        * Force this element to distribute its children to its local dom.
        * This should not be necessary as of Polymer 2.0.2 and is provided only
        * for backwards compatibility.
        * @return {void}
-       */value:function distributeContent(){if(window.ShadyDOM&&this.shadowRoot){ShadyDOM.flush()}}/**
+       */},{key:"distributeContent",value:function distributeContent(){if(window.ShadyDOM&&this.shadowRoot){ShadyDOM.flush()}}/**
        * Returns a list of nodes that are the effective childNodes. The effective
        * childNodes list is the same as the element's childNodes except that
        * any `<content>` elements are replaced with the list of nodes distributed
@@ -4580,10 +4580,10 @@
        * @param {...*} args Array of strings or objects to log
        * @return {Array} Array with formatting information for `console`
        *   logging.
-       */},{key:"_logf",value:function _logf(methodName){for(var _len4=arguments.length,args=Array(1<_len4?_len4-1:0),_key4=1;_key4<_len4;_key4++){args[_key4-1]=arguments[_key4]}return["[%s::%s]",this.is,methodName].concat(args)}},{key:"domHost",get:function get(){var root=this.getRootNode();return babelHelpers.instanceof(root,DocumentFragment)?/** @type {ShadowRoot} */root.host:root}}],[{key:"importMeta",get:function get(){return this.prototype.importMeta}}]);return LegacyElement}(legacyElementBase);/**
+       */},{key:"_logf",value:function _logf(methodName){for(var _len4=arguments.length,args=Array(1<_len4?_len4-1:0),_key4=1;_key4<_len4;_key4++){args[_key4-1]=arguments[_key4]}return["[%s::%s]",this.is,methodName].concat(args)}}],[{key:"importMeta",get:function get(){return this.prototype.importMeta}}]);return LegacyElement}(legacyElementBase);/**
      * Map of simple names to touch action names
      * @dict
-     */LegacyElement.prototype.is="";return LegacyElement})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var lifecycleProps={attached:!0,detached:!0,ready:!0,created:!0,beforeRegister:!0,registered:!0,attributeChanged:!0,listeners:!0,hostAttributes:!0},excludeOnInfo={attached:!0,detached:!0,ready:!0,created:!0,beforeRegister:!0,registered:!0,attributeChanged:!0,behaviors:!0,_noAccessors:!0},excludeOnBehaviors=Object.assign({listeners:!0,hostAttributes:!0,properties:!0,observers:!0},excludeOnInfo);function copyProperties(source,target,excludeProps){for(var noAccessors=source._noAccessors,propertyNames=Object.getOwnPropertyNames(source),i=0,p;i<propertyNames.length;i++){p=propertyNames[i];if(p in excludeProps){continue}if(noAccessors){target[p]=source[p]}else{var pd=Object.getOwnPropertyDescriptor(source,p);if(pd){// ensure property is configurable so that a later behavior can
+     */LegacyElement.prototype.is="";return LegacyElement})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var lifecycleProps={attached:!0,detached:!0,ready:!0,created:!0,beforeRegister:!0,registered:!0,attributeChanged:!0,listeners:!0,hostAttributes:!0},excludeOnInfo={attached:!0,detached:!0,ready:!0,created:!0,beforeRegister:!0,registered:!0,attributeChanged:!0,behaviors:!0,_noAccessors:!0},excludeOnBehaviors=Object.assign({listeners:!0,hostAttributes:!0,properties:!0,observers:!0},excludeOnInfo);function copyProperties(source,target,excludeProps){for(var noAccessors=source._noAccessors,propertyNames=Object.getOwnPropertyNames(source),i=0,p;i<propertyNames.length;i++){p=propertyNames[i];if(p in excludeProps){continue}if(noAccessors){target[p]=source[p]}else{var pd=Object.getOwnPropertyDescriptor(source,p);if(pd){// ensure property is configurable so that a later behavior can
 // re-configure it.
 pd.configurable=!0;Object.defineProperty(target,p,pd)}}}}/**
      * Applies a "legacy" behavior or array of behaviors to the provided class.
@@ -4663,9 +4663,9 @@
      * @suppress {checkTypes}
      * @private
      */function GenerateClassFromInfo(info,Base,behaviors){// manages behavior and lifecycle processing (filled in after class definition)
-var behaviorList,lifecycle={},PolymerGenerated=/*#__PURE__*/function(_Base){babelHelpers.inherits(PolymerGenerated,_Base);var _super=_createSuper(PolymerGenerated);function PolymerGenerated(){babelHelpers.classCallCheck(this,PolymerGenerated);return _super.apply(this,arguments)}babelHelpers.createClass(PolymerGenerated,[{key:"created",/**
+var behaviorList,lifecycle={},PolymerGenerated=/*#__PURE__*/function(_Base){babelHelpers.inherits(PolymerGenerated,_Base);var _super=_createSuper(PolymerGenerated);function PolymerGenerated(){babelHelpers.classCallCheck(this,PolymerGenerated);return _super.apply(this,arguments)}babelHelpers.createClass(PolymerGenerated,[{key:"created",value:/**
          * @return {void}
-         */value:function created(){babelHelpers.get(babelHelpers.getPrototypeOf(PolymerGenerated.prototype),"created",this).call(this);var list=lifecycle.created;if(list){for(var i=0;i<list.length;i++){list[i].call(this)}}}/**
+         */function created(){babelHelpers.get(babelHelpers.getPrototypeOf(PolymerGenerated.prototype),"created",this).call(this);var list=lifecycle.created;if(list){for(var i=0;i<list.length;i++){list[i].call(this)}}}/**
          * @return {void}
          */},{key:"_registered",value:function _registered(){/* NOTE: `beforeRegister` is called here for bc, but the behavior
             is different than in 1.x. In 1.0, the method was called *after*
@@ -4700,8 +4700,8 @@
          * @param {?string} old Old attribute value
          * @param {?string} value New attribute value
          * @return {void}
-         */},{key:"attributeChanged",value:function attributeChanged(name,old,value){babelHelpers.get(babelHelpers.getPrototypeOf(PolymerGenerated.prototype),"attributeChanged",this).call(this);var list=lifecycle.attributeChanged;if(list){for(var i=0;i<list.length;i++){list[i].call(this,name,old,value)}}}}],[{key:"_finalizeClass",// explicitly not calling super._finalizeClass
-value:function _finalizeClass(){// if calling via a subclass that hasn't been generated, pass through to super
+         */},{key:"attributeChanged",value:function attributeChanged(name,old,value){babelHelpers.get(babelHelpers.getPrototypeOf(PolymerGenerated.prototype),"attributeChanged",this).call(this);var list=lifecycle.attributeChanged;if(list){for(var i=0;i<list.length;i++){list[i].call(this,name,old,value)}}}}],[{key:"_finalizeClass",value:// explicitly not calling super._finalizeClass
+function _finalizeClass(){// if calling via a subclass that hasn't been generated, pass through to super
 if(!this.hasOwnProperty(window.JSCompiler_renameProperty("generatedFrom",this))){babelHelpers.get(babelHelpers.getPrototypeOf(PolymerGenerated),"_finalizeClass",this).call(this)}else{// interleave properties and observers per behavior and `info`
 if(behaviorList){for(var i=0,b;i<behaviorList.length;i++){b=behaviorList[i];if(b.properties){this.createProperties(b.properties)}if(b.observers){this.createObservers(b.observers,b.properties)}}}if(info.properties){this.createProperties(info.properties)}if(info.observers){this.createObservers(info.observers,info.properties)}// make sure to prepare the element template
 this._prepareTemplate()}}},{key:"properties",get:function get(){var properties={};if(behaviorList){for(var i=0;i<behaviorList.length;i++){Object.assign(properties,behaviorList[i].properties)}}Object.assign(properties,info.properties);return properties}},{key:"observers",get:function get(){var observers=[];if(behaviorList){for(var i=0,b;i<behaviorList.length;i++){b=behaviorList[i];if(b.observers){observers=observers.concat(b.observers)}}}if(info.observers){observers=observers.concat(info.observers)}return observers}}]);return PolymerGenerated}(Base);// apply behaviors, note actual copying is done lazily at first instance creation
@@ -4781,7 +4781,7 @@
      * @return {function(new:HTMLElement)} Generated class
      * @memberof Polymer
      */Polymer.Class=function(info,mixin){if(!info){console.warn("Polymer.Class requires `info` argument")}var klass=mixin?mixin(Polymer.LegacyElementMixin(HTMLElement)):Polymer.LegacyElementMixin(HTMLElement);klass=GenerateClassFromInfo(info,klass,info.behaviors);if(info._enableDisableUpgrade){klass=Polymer.DisableUpgradeMixin(klass)}// decorate klass with registration info
-klass.is=klass.prototype.is=info.is;return klass};Polymer.mixinBehaviors=mixinBehaviors})();</script><script>(function(){'use strict';/**
+klass.is=klass.prototype.is=info.is;return klass};Polymer.mixinBehaviors=mixinBehaviors})();</script><script>(function(){"use strict";/**
      * Legacy class factory and registration helper for defining Polymer
      * elements.
      *
@@ -4799,7 +4799,7 @@
      * @suppress {duplicate, invalidCasts, checkTypes}
      */window.Polymer._polymerFn=function(info){// if input is a `class` (aka a function with a prototype), use the prototype
 // remember that the `constructor` will never be called
-var klass;if("function"===typeof info){klass=info}else{klass=Polymer.Class(info)}customElements.define(klass.is,/** @type {!HTMLElement} */klass);return klass}})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';// Common implementation for mixin & behavior
+var klass;if("function"===typeof info){klass=info}else{klass=Polymer.Class(info)}customElements.define(klass.is,/** @type {!HTMLElement} */klass);return klass}})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";// Common implementation for mixin & behavior
 function mutablePropertyChange(inst,property,value,old,mutableData){var isObject;if(mutableData){isObject="object"===babelHelpers.typeof(value)&&null!==value;// Pull `old` for Objects from temp cache, but treat `null` as a primitive
 if(isObject){old=inst.__dataTemp[property]}}// Strict equality check, but return false for NaN===NaN
 var shouldChange=old!==value&&(old===old||value===value);// Objects are stored in temporary cache (cleared at end of
@@ -4847,7 +4847,7 @@
      * @polymer
      * @mixinClass
      * @implements {Polymer_MutableData}
-     */var MutableData=/*#__PURE__*/function(_superClass){babelHelpers.inherits(MutableData,_superClass);var _super=_createSuper(MutableData);function MutableData(){babelHelpers.classCallCheck(this,MutableData);return _super.apply(this,arguments)}babelHelpers.createClass(MutableData,[{key:"_shouldPropertyChange",/**
+     */var MutableData=/*#__PURE__*/function(_superClass){babelHelpers.inherits(MutableData,_superClass);var _super=_createSuper(MutableData);function MutableData(){babelHelpers.classCallCheck(this,MutableData);return _super.apply(this,arguments)}babelHelpers.createClass(MutableData,[{key:"_shouldPropertyChange",value:/**
        * Overrides `Polymer.PropertyEffects` to provide option for skipping
        * strict equality checking for Objects and Arrays.
        *
@@ -4863,7 +4863,7 @@
        * @param {*} old Previous property value
        * @return {boolean} Whether the property should be considered a change
        * @protected
-       */value:function _shouldPropertyChange(property,value,old){return mutablePropertyChange(this,property,value,old,!0)}}]);return MutableData}(superClass);return MutableData});/**
+       */function _shouldPropertyChange(property,value,old){return mutablePropertyChange(this,property,value,old,!0)}}]);return MutableData}(superClass);return MutableData});/**
    * Element class mixin to add the optional ability to skip strict
    * dirty-checking for objects and arrays (always consider them to be
    * "dirty") by setting a `mutable-data` attribute on an element instance.
@@ -4907,7 +4907,7 @@
      * @mixinClass
      * @polymer
      * @implements {Polymer_OptionalMutableData}
-     */var OptionalMutableData=/*#__PURE__*/function(_superClass2){babelHelpers.inherits(OptionalMutableData,_superClass2);var _super2=_createSuper(OptionalMutableData);function OptionalMutableData(){babelHelpers.classCallCheck(this,OptionalMutableData);return _super2.apply(this,arguments)}babelHelpers.createClass(OptionalMutableData,[{key:"_shouldPropertyChange",/**
+     */var OptionalMutableData=/*#__PURE__*/function(_superClass2){babelHelpers.inherits(OptionalMutableData,_superClass2);var _super2=_createSuper(OptionalMutableData);function OptionalMutableData(){babelHelpers.classCallCheck(this,OptionalMutableData);return _super2.apply(this,arguments)}babelHelpers.createClass(OptionalMutableData,[{key:"_shouldPropertyChange",value:/**
        * Overrides `Polymer.PropertyEffects` to provide option for skipping
        * strict equality checking for Objects and Arrays.
        *
@@ -4924,12 +4924,12 @@
        * @param {*} old Previous property value
        * @return {boolean} Whether the property should be considered a change
        * @protected
-       */value:function _shouldPropertyChange(property,value,old){return mutablePropertyChange(this,property,value,old,this.mutableData)}}],[{key:"properties",get:function get(){return{/**
+       */function _shouldPropertyChange(property,value,old){return mutablePropertyChange(this,property,value,old,this.mutableData)}}],[{key:"properties",get:function get(){return{/**
            * Instance-level flag for configuring the dirty-checking strategy
            * for this element.  When true, Objects and Arrays will skip dirty
            * checking, otherwise strict equality checking will be used.
            */mutableData:Boolean}}}]);return OptionalMutableData}(superClass);return OptionalMutableData});// Export for use by legacy behavior
-Polymer.MutableData._mutablePropertyChange=mutablePropertyChange})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';// Base class for HTMLTemplateElement extension that has property effects
+Polymer.MutableData._mutablePropertyChange=mutablePropertyChange})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";// Base class for HTMLTemplateElement extension that has property effects
 // machinery for propagating host properties to children. This is an ES5
 // class only because Babel (incorrectly) requires super() in the class
 // constructor even though no `this` is used and it returns an instance.
@@ -4953,7 +4953,7 @@
      * @constructor
      * @implements {Polymer_PropertyEffects}
      * @private
-     */var base=Polymer.PropertyEffects(/*#__PURE__*/function(){function _class(){babelHelpers.classCallCheck(this,_class)}return _class}()),TemplateInstanceBase=/*#__PURE__*/function(_base){babelHelpers.inherits(TemplateInstanceBase,_base);var _super=_createSuper(TemplateInstanceBase);function TemplateInstanceBase(props){var _this;babelHelpers.classCallCheck(this,TemplateInstanceBase);_this=_super.call(this);_this._configureProperties(props);_this.root=_this._stampTemplate(_this.__dataHost);// Save list of stamped children
+     */var base=Polymer.PropertyEffects(/*#__PURE__*/function(){function _class(){babelHelpers.classCallCheck(this,_class)}return babelHelpers.createClass(_class)}()),TemplateInstanceBase=/*#__PURE__*/function(_base){babelHelpers.inherits(TemplateInstanceBase,_base);var _super=_createSuper(TemplateInstanceBase);function TemplateInstanceBase(props){var _this;babelHelpers.classCallCheck(this,TemplateInstanceBase);_this=_super.call(this);_this._configureProperties(props);_this.root=_this._stampTemplate(_this.__dataHost);// Save list of stamped children
 for(var children=_this.children=[],n=_this.root.firstChild;n;n=n.nextSibling){children.push(n);n.__templatizeInstance=babelHelpers.assertThisInitialized(_this)}if(_this.__templatizeOwner&&_this.__templatizeOwner.__hideTemplateChildren__){_this._showHideChildren(!0)}// Flush props only when props are passed if instance props exist
 // or when there isn't instance props.
 var options=_this.__templatizeOptions;if(props&&options.instanceProps||!options.instanceProps){_this._enableProperties()}return _this}/**
@@ -5011,16 +5011,16 @@
        * or else the host element.
        *
        * @return {!Polymer_PropertyEffects} The parent model of this instance
-       */},{key:"dispatchEvent",/**
+       */},{key:"parentModel",get:function get(){var model=this.__parentModel;if(!model){var options;model=this;do{// A template instance's `__dataHost` is a <template>
+// `model.__dataHost.__dataHost` is the template's host
+model=model.__dataHost.__dataHost}while((options=model.__templatizeOptions)&&!options.parentModel);this.__parentModel=model}return model}/**
        * Stub of HTMLElement's `dispatchEvent`, so that effects that may
        * dispatch events safely no-op.
        *
        * @param {Event} event Event to dispatch
        * @return {boolean} Always true.
-       */value:function dispatchEvent(event){// eslint-disable-line no-unused-vars
-return!0}},{key:"parentModel",get:function get(){var model=this.__parentModel;if(!model){var options;model=this;do{// A template instance's `__dataHost` is a <template>
-// `model.__dataHost.__dataHost` is the template's host
-model=model.__dataHost.__dataHost}while((options=model.__templatizeOptions)&&!options.parentModel);this.__parentModel=model}return model}}]);return TemplateInstanceBase}(base);/**
+       */},{key:"dispatchEvent",value:function dispatchEvent(event){// eslint-disable-line no-unused-vars
+return!0}}]);return TemplateInstanceBase}(base);/**
      * @polymer
      * @customElement
      * @appliesMixin Polymer.PropertyEffects
@@ -5043,10 +5043,10 @@
        * @constructor
        * @extends {base}
        * @private
-       */var klass=/*#__PURE__*/function(_base2){babelHelpers.inherits(klass,_base2);var _super2=_createSuper(klass);function klass(){babelHelpers.classCallCheck(this,klass);return _super2.apply(this,arguments)}return klass}(base);klass.prototype.__templatizeOptions=options;klass.prototype._bindTemplate(template);addNotifyEffects(klass,template,templateInfo,options);return klass}/**
+       */var klass=/*#__PURE__*/function(_base2){babelHelpers.inherits(klass,_base2);var _super2=_createSuper(klass);function klass(){babelHelpers.classCallCheck(this,klass);return _super2.apply(this,arguments)}return babelHelpers.createClass(klass)}(base);klass.prototype.__templatizeOptions=options;klass.prototype._bindTemplate(template);addNotifyEffects(klass,template,templateInfo,options);return klass}/**
      * @suppress {missingProperties} class.prototype is not defined for some reason
      */function addPropagateEffects(template,templateInfo,options){var userForwardHostProp=options.forwardHostProp;if(userForwardHostProp){// Provide data API and property effects on memoized template class
-var klass=templateInfo.templatizeTemplateClass;if(!klass){var _base3=options.mutableData?MutableDataTemplate:DataTemplate;/** @private */klass=templateInfo.templatizeTemplateClass=/*#__PURE__*/function(_base4){babelHelpers.inherits(TemplatizedTemplate,_base4);var _super3=_createSuper(TemplatizedTemplate);function TemplatizedTemplate(){babelHelpers.classCallCheck(this,TemplatizedTemplate);return _super3.apply(this,arguments)}return TemplatizedTemplate}(_base3);// Add template - >instances effects
+var klass=templateInfo.templatizeTemplateClass;if(!klass){var _base3=options.mutableData?MutableDataTemplate:DataTemplate;/** @private */klass=templateInfo.templatizeTemplateClass=/*#__PURE__*/function(_base4){babelHelpers.inherits(TemplatizedTemplate,_base4);var _super3=_createSuper(TemplatizedTemplate);function TemplatizedTemplate(){babelHelpers.classCallCheck(this,TemplatizedTemplate);return _super3.apply(this,arguments)}return babelHelpers.createClass(TemplatizedTemplate)}(_base3);// Add template - >instances effects
 // and host <- template effects
 var hostProps=templateInfo.hostProps;for(var prop in hostProps){klass.prototype._addPropertyEffect("_host_"+prop,klass.prototype.PROPERTY_EFFECT_TYPES.PROPAGATE,{fn:createForwardHostPropEffect(prop,userForwardHostProp)});klass.prototype._createNotifyingProperty("_host_"+prop)}}upgradeTemplate(template,klass);// Mix any pre-bound data into __data; no need to flush this to
 // instances since they pull from the template at instance-time
@@ -5173,7 +5173,7 @@
 // e.g. for dom-if & dom-repeat in main document, _methodHost is null
 if(Polymer.strictTemplatePolicy&&!findMethodHost(template)){throw new Error("strictTemplatePolicy: template owner not trusted")}options=/** @type {!TemplatizeOptions} */options||{};if(template.__templatizeOwner){throw new Error("A <template> can only be templatized once")}template.__templatizeOwner=owner;var ctor=owner?owner.constructor:TemplateInstanceBase,templateInfo=ctor._parseTemplate(template),baseClass=templateInfo.templatizeInstanceClass;if(!baseClass){baseClass=createTemplatizerClass(template,templateInfo,options);templateInfo.templatizeInstanceClass=baseClass}// Host property forwarding must be installed onto template instance
 addPropagateEffects(template,templateInfo,options);// Subclass base class and add reference for this specific template
-/** @private */var klass=/*#__PURE__*/function(_baseClass){babelHelpers.inherits(TemplateInstance,_baseClass);var _super4=_createSuper(TemplateInstance);function TemplateInstance(){babelHelpers.classCallCheck(this,TemplateInstance);return _super4.apply(this,arguments)}return TemplateInstance}(baseClass);klass.prototype._methodHost=findMethodHost(template);klass.prototype.__dataHost=template;klass.prototype.__templatizeOwner=owner;klass.prototype.__hostProps=templateInfo.hostProps;klass=/** @type {function(new:TemplateInstanceBase)} */klass;//eslint-disable-line no-self-assign
+/** @private */var klass=/*#__PURE__*/function(_baseClass){babelHelpers.inherits(TemplateInstance,_baseClass);var _super4=_createSuper(TemplateInstance);function TemplateInstance(){babelHelpers.classCallCheck(this,TemplateInstance);return _super4.apply(this,arguments)}return babelHelpers.createClass(TemplateInstance)}(baseClass);klass.prototype._methodHost=findMethodHost(template);klass.prototype.__dataHost=template;klass.prototype.__templatizeOwner=owner;klass.prototype.__hostProps=templateInfo.hostProps;klass=/** @type {function(new:TemplateInstanceBase)} */klass;//eslint-disable-line no-self-assign
 return klass},/**
        * Returns the template "model" associated with a given element, which
        * serves as the binding scope for the template instance the element is
@@ -5201,7 +5201,7 @@
 // from its __dataHost
 if(model.__dataHost!=template){node=model.__dataHost}else{return model}}else{// Still in a template scope, keep going up until
 // a __templatizeInstance is found
-node=node.parentNode}}return null}};Polymer.TemplateInstanceBase=TemplateInstanceBase})();</script><script>(function(){'use strict';var TemplateInstanceBase=Polymer.TemplateInstanceBase,TemplatizerUser;// eslint-disable-line
+node=node.parentNode}}return null}};Polymer.TemplateInstanceBase=TemplateInstanceBase})();</script><script>(function(){"use strict";var TemplateInstanceBase=Polymer.TemplateInstanceBase,TemplatizerUser;// eslint-disable-line
 /**
      * @typedef {{
      *   _templatizerTemplate: HTMLTemplateElement,
@@ -5305,20 +5305,20 @@
        * @return {TemplateInstanceBase} Model representing the binding scope for
        *   the element.
        * @this {TemplatizerUser}
-       */modelForElement:function modelForElement(el){return Polymer.Templatize.modelForElement(this._templatizerTemplate,el)}}})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';/**
+       */modelForElement:function modelForElement(el){return Polymer.Templatize.modelForElement(this._templatizerTemplate,el)}}})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";/**
      * @constructor
      * @extends {HTMLElement}
      * @implements {Polymer_PropertyEffects}
      * @implements {Polymer_OptionalMutableData}
      * @implements {Polymer_GestureEventListeners}
      * @private
-     */var domBindBase=Polymer.GestureEventListeners(Polymer.OptionalMutableData(Polymer.PropertyEffects(HTMLElement))),DomBind=/*#__PURE__*/function(_domBindBase){babelHelpers.inherits(DomBind,_domBindBase);var _super=_createSuper(DomBind);babelHelpers.createClass(DomBind,null,[{key:"observedAttributes",get:function get(){return["mutable-data"]}}]);function DomBind(){var _this;babelHelpers.classCallCheck(this,DomBind);_this=_super.call(this);if(Polymer.strictTemplatePolicy){throw new Error("strictTemplatePolicy: dom-bind not allowed")}_this.root=null;_this.$=null;_this.__children=null;return _this}/** @return {void} */babelHelpers.createClass(DomBind,[{key:"attributeChangedCallback",value:function attributeChangedCallback(){// assumes only one observed attribute
+     */var domBindBase=Polymer.GestureEventListeners(Polymer.OptionalMutableData(Polymer.PropertyEffects(HTMLElement))),DomBind=/*#__PURE__*/function(_domBindBase){babelHelpers.inherits(DomBind,_domBindBase);var _super=_createSuper(DomBind);function DomBind(){var _this;babelHelpers.classCallCheck(this,DomBind);_this=_super.call(this);if(Polymer.strictTemplatePolicy){throw new Error("strictTemplatePolicy: dom-bind not allowed")}_this.root=null;_this.$=null;_this.__children=null;return _this}/** @return {void} */babelHelpers.createClass(DomBind,[{key:"attributeChangedCallback",value:function attributeChangedCallback(){// assumes only one observed attribute
 this.mutableData=!0}/** @return {void} */},{key:"connectedCallback",value:function connectedCallback(){this.style.display="none";this.render()}/** @return {void} */},{key:"disconnectedCallback",value:function disconnectedCallback(){this.__removeChildren()}},{key:"__insertChildren",value:function __insertChildren(){this.parentNode.insertBefore(this.root,this)}},{key:"__removeChildren",value:function __removeChildren(){if(this.__children){for(var i=0;i<this.__children.length;i++){this.root.appendChild(this.__children[i])}}}/**
        * Forces the element to render its content. This is typically only
        * necessary to call if HTMLImports with the async attribute are used.
        * @return {void}
        */},{key:"render",value:function render(){var _this2=this,template;if(!this.__children){template=/** @type {HTMLTemplateElement} */template||this.querySelector("template");if(!template){// Wait until childList changes and template should be there by then
-var observer=new MutationObserver(function(){template=/** @type {HTMLTemplateElement} */_this2.querySelector("template");if(template){observer.disconnect();_this2.render()}else{throw new Error("dom-bind requires a <template> child")}});observer.observe(this,{childList:!0});return}this.root=this._stampTemplate(template);this.$=this.root.$;this.__children=[];for(var n=this.root.firstChild;n;n=n.nextSibling){this.__children[this.__children.length]=n}this._enableProperties()}this.__insertChildren();this.dispatchEvent(new CustomEvent("dom-change",{bubbles:!0,composed:!0}))}}]);return DomBind}(domBindBase);/**
+var observer=new MutationObserver(function(){template=/** @type {HTMLTemplateElement} */_this2.querySelector("template");if(template){observer.disconnect();_this2.render()}else{throw new Error("dom-bind requires a <template> child")}});observer.observe(this,{childList:!0});return}this.root=this._stampTemplate(template);this.$=this.root.$;this.__children=[];for(var n=this.root.firstChild;n;n=n.nextSibling){this.__children[this.__children.length]=n}this._enableProperties()}this.__insertChildren();this.dispatchEvent(new CustomEvent("dom-change",{bubbles:!0,composed:!0}))}}],[{key:"observedAttributes",get:function get(){return["mutable-data"]}}]);return DomBind}(domBindBase);/**
      * Custom element to allow using Polymer's template features (data binding,
      * declarative event listeners, etc.) in the main document without defining
      * a new custom element.
@@ -5337,7 +5337,7 @@
      * @memberof Polymer
      * @summary Custom element to allow using Polymer's template features (data
      *   binding, declarative event listeners, etc.) in the main document.
-     */customElements.define("dom-bind",DomBind);/** @const */Polymer.DomBind=DomBind})();</script><script>(function(){'use strict';/**
+     */customElements.define("dom-bind",DomBind);/** @const */Polymer.DomBind=DomBind})();</script><script>(function(){"use strict";/**
      * Class representing a static string value which can be used to filter
      * strings by asseting that they have been created via this class. The
      * `value` property returns the string passed to the constructor.
@@ -5405,7 +5405,7 @@
      * @param {!ITemplateArray} strings Constant parts of tagged template literal
      * @param {...*} values Variable parts of tagged template literal
      * @return {!LiteralString} Constructed literal string
-     */Polymer.htmlLiteral=function(strings){for(var _len2=arguments.length,values=Array(1<_len2?_len2-1:0),_key2=1;_key2<_len2;_key2++){values[_key2-1]=arguments[_key2]}return new LiteralString(values.reduce(function(acc,v,idx){return acc+literalValue(v)+strings[idx+1]},strings[0]))}})();</script><script>(function(){'use strict';/**
+     */Polymer.htmlLiteral=function(strings){for(var _len2=arguments.length,values=Array(1<_len2?_len2-1:0),_key2=1;_key2<_len2;_key2++){values[_key2-1]=arguments[_key2]}return new LiteralString(values.reduce(function(acc,v,idx){return acc+literalValue(v)+strings[idx+1]},strings[0]))}})();</script><script>(function(){"use strict";/**
    * Base class that provides the core API for Polymer's meta-programming
    * features including template stamping, data-binding, attribute deserialization,
    * and property change observation.
@@ -5420,77 +5420,7 @@
    *   key meta-programming features including template stamping, data-binding,
    *   attribute deserialization, and property change observation
    */Polymer.Element=Polymer.ElementMixin(HTMLElement);// NOTE: this is here for modulizer to export `html` for the module version of this file
-Polymer.html=Polymer.html})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var TemplateInstanceBase=Polymer.TemplateInstanceBase,domRepeatBase=Polymer.OptionalMutableData(Polymer.Element),DomRepeat=/*#__PURE__*/function(_domRepeatBase){babelHelpers.inherits(DomRepeat,_domRepeatBase);var _super=_createSuper(DomRepeat);babelHelpers.createClass(DomRepeat,null,[{key:"is",// Not needed to find template; can be removed once the analyzer
-// can find the tag name from customElements.define call
-get:function get(){return"dom-repeat"}},{key:"template",get:function get(){return null}},{key:"properties",get:function get(){/**
-       * Fired whenever DOM is added or removed by this template (by
-       * default, rendering occurs lazily).  To force immediate rendering, call
-       * `render`.
-       *
-       * @event dom-change
-       */return{/**
-         * An array containing items determining how many instances of the template
-         * to stamp and that that each template instance should bind to.
-         */items:{type:Array},/**
-         * The name of the variable to add to the binding scope for the array
-         * element associated with a given template instance.
-         */as:{type:String,value:"item"},/**
-         * The name of the variable to add to the binding scope with the index
-         * of the instance in the sorted and filtered list of rendered items.
-         * Note, for the index in the `this.items` array, use the value of the
-         * `itemsIndexAs` property.
-         */indexAs:{type:String,value:"index"},/**
-         * The name of the variable to add to the binding scope with the index
-         * of the instance in the `this.items` array. Note, for the index of
-         * this instance in the sorted and filtered list of rendered items,
-         * use the value of the `indexAs` property.
-         */itemsIndexAs:{type:String,value:"itemsIndex"},/**
-         * A function that should determine the sort order of the items.  This
-         * property should either be provided as a string, indicating a method
-         * name on the element's host, or else be an actual function.  The
-         * function should match the sort function passed to `Array.sort`.
-         * Using a sort function has no effect on the underlying `items` array.
-         */sort:{type:Function,observer:"__sortChanged"},/**
-         * A function that can be used to filter items out of the view.  This
-         * property should either be provided as a string, indicating a method
-         * name on the element's host, or else be an actual function.  The
-         * function should match the sort function passed to `Array.filter`.
-         * Using a filter function has no effect on the underlying `items` array.
-         */filter:{type:Function,observer:"__filterChanged"},/**
-         * When using a `filter` or `sort` function, the `observe` property
-         * should be set to a space-separated list of the names of item
-         * sub-fields that should trigger a re-sort or re-filter when changed.
-         * These should generally be fields of `item` that the sort or filter
-         * function depends on.
-         */observe:{type:String,observer:"__observeChanged"},/**
-         * When using a `filter` or `sort` function, the `delay` property
-         * determines a debounce time in ms after a change to observed item
-         * properties that must pass before the filter or sort is re-run.
-         * This is useful in rate-limiting shuffling of the view when
-         * item changes may be frequent.
-         */delay:Number,/**
-         * Count of currently rendered items after `filter` (if any) has been applied.
-         * If "chunking mode" is enabled, `renderedItemCount` is updated each time a
-         * set of template instances is rendered.
-         *
-         */renderedItemCount:{type:Number,notify:!0,readOnly:!0},/**
-         * Defines an initial count of template instances to render after setting
-         * the `items` array, before the next paint, and puts the `dom-repeat`
-         * into "chunking mode".  The remaining items will be created and rendered
-         * incrementally at each animation frame therof until all instances have
-         * been rendered.
-         */initialCount:{type:Number,observer:"__initializeChunking"},/**
-         * When `initialCount` is used, this property defines a frame rate (in
-         * fps) to target by throttling the number of instances rendered each
-         * frame to not exceed the budget for the target frame rate.  The
-         * framerate is effectively the number of `requestAnimationFrame`s that
-         * it tries to allow to actually fire in a given second. It does this
-         * by measuring the time between `rAF`s and continuously adjusting the
-         * number of items created each `rAF` to maintain the target framerate.
-         * Setting this to a higher number allows lower latency and higher
-         * throughput for event handlers and other tasks, but results in a
-         * longer time for the remaining items to complete rendering.
-         */targetFramerate:{type:Number,value:20},_targetFrameTime:{type:Number,computed:"__computeFrameTime(targetFramerate)"}}}},{key:"observers",get:function get(){return["__itemsChanged(items.*)"]}}]);function DomRepeat(){var _this;babelHelpers.classCallCheck(this,DomRepeat);_this=_super.call(this);_this.__instances=[];_this.__limit=1/0;_this.__pool=[];_this.__renderDebouncer=null;_this.__itemsIdxToInstIdx={};_this.__chunkCount=null;_this.__lastChunkTime=null;_this.__sortFn=null;_this.__filterFn=null;_this.__observePaths=null;_this.__ctor=null;_this.__isDetached=!0;_this.template=null;return _this}/**
+Polymer.html=Polymer.html})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var TemplateInstanceBase=Polymer.TemplateInstanceBase,domRepeatBase=Polymer.OptionalMutableData(Polymer.Element),DomRepeat=/*#__PURE__*/function(_domRepeatBase){babelHelpers.inherits(DomRepeat,_domRepeatBase);var _super=_createSuper(DomRepeat);function DomRepeat(){var _this;babelHelpers.classCallCheck(this,DomRepeat);_this=_super.call(this);_this.__instances=[];_this.__limit=1/0;_this.__pool=[];_this.__renderDebouncer=null;_this.__itemsIdxToInstIdx={};_this.__chunkCount=null;_this.__lastChunkTime=null;_this.__sortFn=null;_this.__filterFn=null;_this.__observePaths=null;_this.__ctor=null;_this.__isDetached=!0;_this.template=null;return _this}/**
      * @return {void}
      */babelHelpers.createClass(DomRepeat,[{key:"disconnectedCallback",value:function disconnectedCallback(){babelHelpers.get(babelHelpers.getPrototypeOf(DomRepeat.prototype),"disconnectedCallback",this).call(this);this.__isDetached=!0;for(var i=0;i<this.__instances.length;i++){this.__detachInstance(i)}}/**
      * @return {void}
@@ -5606,13 +5536,83 @@
      * @param {!HTMLElement} el Element for which to return a template model.
      * @return {TemplateInstanceBase} Model representing the binding scope for
      *   the element.
-     */},{key:"modelForElement",value:function modelForElement(el){return Polymer.Templatize.modelForElement(this.template,el)}}]);return DomRepeat}(domRepeatBase);// eslint-disable-line
+     */},{key:"modelForElement",value:function modelForElement(el){return Polymer.Templatize.modelForElement(this.template,el)}}],[{key:"is",get:// Not needed to find template; can be removed once the analyzer
+// can find the tag name from customElements.define call
+function get(){return"dom-repeat"}},{key:"template",get:function get(){return null}},{key:"properties",get:function get(){/**
+       * Fired whenever DOM is added or removed by this template (by
+       * default, rendering occurs lazily).  To force immediate rendering, call
+       * `render`.
+       *
+       * @event dom-change
+       */return{/**
+         * An array containing items determining how many instances of the template
+         * to stamp and that that each template instance should bind to.
+         */items:{type:Array},/**
+         * The name of the variable to add to the binding scope for the array
+         * element associated with a given template instance.
+         */as:{type:String,value:"item"},/**
+         * The name of the variable to add to the binding scope with the index
+         * of the instance in the sorted and filtered list of rendered items.
+         * Note, for the index in the `this.items` array, use the value of the
+         * `itemsIndexAs` property.
+         */indexAs:{type:String,value:"index"},/**
+         * The name of the variable to add to the binding scope with the index
+         * of the instance in the `this.items` array. Note, for the index of
+         * this instance in the sorted and filtered list of rendered items,
+         * use the value of the `indexAs` property.
+         */itemsIndexAs:{type:String,value:"itemsIndex"},/**
+         * A function that should determine the sort order of the items.  This
+         * property should either be provided as a string, indicating a method
+         * name on the element's host, or else be an actual function.  The
+         * function should match the sort function passed to `Array.sort`.
+         * Using a sort function has no effect on the underlying `items` array.
+         */sort:{type:Function,observer:"__sortChanged"},/**
+         * A function that can be used to filter items out of the view.  This
+         * property should either be provided as a string, indicating a method
+         * name on the element's host, or else be an actual function.  The
+         * function should match the sort function passed to `Array.filter`.
+         * Using a filter function has no effect on the underlying `items` array.
+         */filter:{type:Function,observer:"__filterChanged"},/**
+         * When using a `filter` or `sort` function, the `observe` property
+         * should be set to a space-separated list of the names of item
+         * sub-fields that should trigger a re-sort or re-filter when changed.
+         * These should generally be fields of `item` that the sort or filter
+         * function depends on.
+         */observe:{type:String,observer:"__observeChanged"},/**
+         * When using a `filter` or `sort` function, the `delay` property
+         * determines a debounce time in ms after a change to observed item
+         * properties that must pass before the filter or sort is re-run.
+         * This is useful in rate-limiting shuffling of the view when
+         * item changes may be frequent.
+         */delay:Number,/**
+         * Count of currently rendered items after `filter` (if any) has been applied.
+         * If "chunking mode" is enabled, `renderedItemCount` is updated each time a
+         * set of template instances is rendered.
+         *
+         */renderedItemCount:{type:Number,notify:!0,readOnly:!0},/**
+         * Defines an initial count of template instances to render after setting
+         * the `items` array, before the next paint, and puts the `dom-repeat`
+         * into "chunking mode".  The remaining items will be created and rendered
+         * incrementally at each animation frame therof until all instances have
+         * been rendered.
+         */initialCount:{type:Number,observer:"__initializeChunking"},/**
+         * When `initialCount` is used, this property defines a frame rate (in
+         * fps) to target by throttling the number of instances rendered each
+         * frame to not exceed the budget for the target frame rate.  The
+         * framerate is effectively the number of `requestAnimationFrame`s that
+         * it tries to allow to actually fire in a given second. It does this
+         * by measuring the time between `rAF`s and continuously adjusting the
+         * number of items created each `rAF` to maintain the target framerate.
+         * Setting this to a higher number allows lower latency and higher
+         * throughput for event handlers and other tasks, but results in a
+         * longer time for the remaining items to complete rendering.
+         */targetFramerate:{type:Number,value:20},_targetFrameTime:{type:Number,computed:"__computeFrameTime(targetFramerate)"}}}},{key:"observers",get:function get(){return["__itemsChanged(items.*)"]}}]);return DomRepeat}(domRepeatBase);// eslint-disable-line
 /**
    * @constructor
    * @implements {Polymer_OptionalMutableData}
    * @extends {Polymer.Element}
    * @private
-   */customElements.define(DomRepeat.is,DomRepeat);/** @const */Polymer.DomRepeat=DomRepeat})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';/**
+   */customElements.define(DomRepeat.is,DomRepeat);/** @const */Polymer.DomRepeat=DomRepeat})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";/**
    * The `<dom-if>` element will stamp a light-dom `<template>` child when
    * the `if` property becomes truthy, and the template can use Polymer
    * data-binding and declarative event features when used in the context of
@@ -5633,23 +5633,7 @@
    * @memberof Polymer
    * @summary Custom element that conditionally stamps and hides or removes
    *   template content based on a boolean flag.
-   */var DomIf=/*#__PURE__*/function(_Polymer$Element){babelHelpers.inherits(DomIf,_Polymer$Element);var _super=_createSuper(DomIf);babelHelpers.createClass(DomIf,null,[{key:"is",// Not needed to find template; can be removed once the analyzer
-// can find the tag name from customElements.define call
-get:function get(){return"dom-if"}},{key:"template",get:function get(){return null}},{key:"properties",get:function get(){return{/**
-         * Fired whenever DOM is added or removed/hidden by this template (by
-         * default, rendering occurs lazily).  To force immediate rendering, call
-         * `render`.
-         *
-         * @event dom-change
-         */ /**
-         * A boolean indicating whether this template should stamp.
-         */if:{type:Boolean,observer:"__debounceRender"},/**
-         * When true, elements will be removed from DOM and discarded when `if`
-         * becomes false and re-created and added back to the DOM when `if`
-         * becomes true.  By default, stamped elements will be hidden but left
-         * in the DOM when `if` becomes false, which is generally results
-         * in better performance.
-         */restamp:{type:Boolean,observer:"__debounceRender"}}}}]);function DomIf(){var _this;babelHelpers.classCallCheck(this,DomIf);_this=_super.call(this);_this.__renderDebouncer=null;_this.__invalidProps=null;_this.__instance=null;_this._lastIf=!1;_this.__ctor=null;return _this}babelHelpers.createClass(DomIf,[{key:"__debounceRender",value:function __debounceRender(){var _this2=this;// Render is async for 2 reasons:
+   */var DomIf=/*#__PURE__*/function(_Polymer$Element){babelHelpers.inherits(DomIf,_Polymer$Element);var _super=_createSuper(DomIf);function DomIf(){var _this;babelHelpers.classCallCheck(this,DomIf);_this=_super.call(this);_this.__renderDebouncer=null;_this.__invalidProps=null;_this.__instance=null;_this._lastIf=!1;_this.__ctor=null;return _this}babelHelpers.createClass(DomIf,[{key:"__debounceRender",value:function __debounceRender(){var _this2=this;// Render is async for 2 reasons:
 // 1. To eliminate dom creation trashing if user code thrashes `if` in the
 //    same turn. This was more common in 1.x where a compound computed
 //    property could result in the result changing multiple times, but is
@@ -5699,7 +5683,23 @@
      * "shown."
      * @return {void}
      * @protected
-     */},{key:"_showHideChildren",value:function _showHideChildren(){var hidden=this.__hideTemplateChildren__||!this.if;if(this.__instance){this.__instance._showHideChildren(hidden)}}}]);return DomIf}(Polymer.Element);customElements.define(DomIf.is,DomIf);/** @const */Polymer.DomIf=DomIf})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';/**
+     */},{key:"_showHideChildren",value:function _showHideChildren(){var hidden=this.__hideTemplateChildren__||!this.if;if(this.__instance){this.__instance._showHideChildren(hidden)}}}],[{key:"is",get:// Not needed to find template; can be removed once the analyzer
+// can find the tag name from customElements.define call
+function get(){return"dom-if"}},{key:"template",get:function get(){return null}},{key:"properties",get:function get(){return{/**
+         * Fired whenever DOM is added or removed/hidden by this template (by
+         * default, rendering occurs lazily).  To force immediate rendering, call
+         * `render`.
+         *
+         * @event dom-change
+         */ /**
+         * A boolean indicating whether this template should stamp.
+         */if:{type:Boolean,observer:"__debounceRender"},/**
+         * When true, elements will be removed from DOM and discarded when `if`
+         * becomes false and re-created and added back to the DOM when `if`
+         * becomes true.  By default, stamped elements will be hidden but left
+         * in the DOM when `if` becomes false, which is generally results
+         * in better performance.
+         */restamp:{type:Boolean,observer:"__debounceRender"}}}}]);return DomIf}(Polymer.Element);customElements.define(DomIf.is,DomIf);/** @const */Polymer.DomIf=DomIf})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";/**
    * Element mixin for recording dynamic associations between item paths in a
    * master `items` array and a `selected` array such that path changes to the
    * master array (at the host) element or elsewhere via data-binding) are
@@ -5724,35 +5724,17 @@
      * @extends {superClass}
      * @implements {Polymer_ElementMixin}
      * @private
-     */var elementBase=Polymer.ElementMixin(superClass),ArraySelectorMixin=/*#__PURE__*/function(_elementBase){babelHelpers.inherits(ArraySelectorMixin,_elementBase);var _super=_createSuper(ArraySelectorMixin);babelHelpers.createClass(ArraySelectorMixin,null,[{key:"properties",get:function get(){return{/**
-           * An array containing items from which selection will be made.
-           */items:{type:Array},/**
-           * When `true`, multiple items may be selected at once (in this case,
-           * `selected` is an array of currently selected items).  When `false`,
-           * only one item may be selected at a time.
-           */multi:{type:Boolean,value:!1},/**
-           * When `multi` is true, this is an array that contains any selected.
-           * When `multi` is false, this is the currently selected item, or `null`
-           * if no item is selected.
-           * @type {?(Object|Array<!Object>)}
-           */selected:{type:Object,notify:!0},/**
-           * When `multi` is false, this is the currently selected item, or `null`
-           * if no item is selected.
-           * @type {?Object}
-           */selectedItem:{type:Object,notify:!0},/**
-           * When `true`, calling `select` on an item that is already selected
-           * will deselect the item.
-           */toggle:{type:Boolean,value:!1}}}},{key:"observers",get:function get(){return["__updateSelection(multi, items.*)"]}}]);function ArraySelectorMixin(){var _this;babelHelpers.classCallCheck(this,ArraySelectorMixin);_this=_super.call(this);_this.__lastItems=null;_this.__lastMulti=null;_this.__selectedMap=null;return _this}babelHelpers.createClass(ArraySelectorMixin,[{key:"__updateSelection",value:function __updateSelection(multi,itemsInfo){var path=itemsInfo.path;if(path==JSCompiler_renameProperty("items",this)){// Case 1 - items array changed, so diff against previous array and
+     */var elementBase=Polymer.ElementMixin(superClass),ArraySelectorMixin=/*#__PURE__*/function(_elementBase){babelHelpers.inherits(ArraySelectorMixin,_elementBase);var _super=_createSuper(ArraySelectorMixin);function ArraySelectorMixin(){var _this;babelHelpers.classCallCheck(this,ArraySelectorMixin);_this=_super.call(this);_this.__lastItems=null;_this.__lastMulti=null;_this.__selectedMap=null;return _this}babelHelpers.createClass(ArraySelectorMixin,[{key:"__updateSelection",value:function __updateSelection(multi,itemsInfo){var path=itemsInfo.path;if(path==JSCompiler_renameProperty("items",this)){// Case 1 - items array changed, so diff against previous array and
 // deselect any removed items and adjust selected indices
 var newItems=itemsInfo.base||[],lastItems=this.__lastItems,lastMulti=this.__lastMulti;if(multi!==lastMulti){this.clearSelection()}if(lastItems){var splices=Polymer.ArraySplice.calculateSplices(newItems,lastItems);this.__applySplices(splices)}this.__lastItems=newItems;this.__lastMulti=multi}else if(itemsInfo.path=="".concat(JSCompiler_renameProperty("items",this),".splices")){// Case 2 - got specific splice information describing the array mutation:
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-for(var _this2=this,selected=this.__selectedMap,_loop=function _loop(i){var s=splices[i];selected.forEach(function(idx,item){if(idx<s.index){// no change
+for(var _this2=this,selected=this.__selectedMap,_loop=function _loop(){var s=splices[i];selected.forEach(function(idx,item){if(idx<s.index){// no change
 }else if(idx>=s.index+s.removed.length){// adjust index
 selected.set(item,idx+s.addedCount-s.removed.length)}else{// remove index
-selected.set(item,-1)}});for(var j=0,idx;j<s.addedCount;j++){idx=s.index+j;if(selected.has(_this2.items[idx])){selected.set(_this2.items[idx],idx)}}},i=0;i<splices.length;i++){_loop(i)}// Update linked paths
+selected.set(item,-1)}});for(var j=0,idx;j<s.addedCount;j++){idx=s.index+j;if(selected.has(_this2.items[idx])){selected.set(_this2.items[idx],idx)}}},i=0;i<splices.length;i++){_loop()}// Update linked paths
 this.__updateLinks();// Remove selected items that were removed from the items array
 var sidx=0;selected.forEach(function(idx,item){if(0>idx){if(_this2.multi){_this2.splice(JSCompiler_renameProperty("selected",_this2),sidx,1)}else{_this2.selected=_this2.selectedItem=null}selected.delete(item)}else{sidx++}})}},{key:"__updateLinks",value:function __updateLinks(){var _this3=this;this.__dataLinkedPaths={};if(this.multi){var sidx=0;this.__selectedMap.forEach(function(idx){if(0<=idx){_this3.linkPaths("".concat(JSCompiler_renameProperty("items",_this3),".").concat(idx),"".concat(JSCompiler_renameProperty("selected",_this3),".").concat(sidx++))}})}else{this.__selectedMap.forEach(function(idx){_this3.linkPaths(JSCompiler_renameProperty("selected",_this3),"".concat(JSCompiler_renameProperty("items",_this3),".").concat(idx));_this3.linkPaths(JSCompiler_renameProperty("selectedItem",_this3),"".concat(JSCompiler_renameProperty("items",_this3),".").concat(idx))})}}/**
        * Clears the selection state.
@@ -5795,7 +5777,25 @@
        *
        * @param {number} idx Index from `items` array to select
        * @return {void}
-       */},{key:"selectIndex",value:function selectIndex(idx){var item=this.items[idx];if(!this.isSelected(item)){if(!this.multi){this.__selectedMap.clear()}this.__selectedMap.set(item,idx);this.__updateLinks();if(this.multi){this.push(JSCompiler_renameProperty("selected",this),item)}else{this.selected=this.selectedItem=item}}else if(this.toggle){this.deselectIndex(idx)}}}]);return ArraySelectorMixin}(elementBase);/**
+       */},{key:"selectIndex",value:function selectIndex(idx){var item=this.items[idx];if(!this.isSelected(item)){if(!this.multi){this.__selectedMap.clear()}this.__selectedMap.set(item,idx);this.__updateLinks();if(this.multi){this.push(JSCompiler_renameProperty("selected",this),item)}else{this.selected=this.selectedItem=item}}else if(this.toggle){this.deselectIndex(idx)}}}],[{key:"properties",get:function get(){return{/**
+           * An array containing items from which selection will be made.
+           */items:{type:Array},/**
+           * When `true`, multiple items may be selected at once (in this case,
+           * `selected` is an array of currently selected items).  When `false`,
+           * only one item may be selected at a time.
+           */multi:{type:Boolean,value:!1},/**
+           * When `multi` is true, this is an array that contains any selected.
+           * When `multi` is false, this is the currently selected item, or `null`
+           * if no item is selected.
+           * @type {?(Object|Array<!Object>)}
+           */selected:{type:Object,notify:!0},/**
+           * When `multi` is false, this is the currently selected item, or `null`
+           * if no item is selected.
+           * @type {?Object}
+           */selectedItem:{type:Object,notify:!0},/**
+           * When `true`, calling `select` on an item that is already selected
+           * will deselect the item.
+           */toggle:{type:Boolean,value:!1}}}},{key:"observers",get:function get(){return["__updateSelection(multi, items.*)"]}}]);return ArraySelectorMixin}(elementBase);/**
      * @polymer
      * @mixinClass
      * @implements {Polymer_ArraySelectorMixin}
@@ -5806,9 +5806,9 @@
    * @extends {Polymer.Element}
    * @implements {Polymer_ArraySelectorMixin}
    * @private
-   */var baseArraySelector=ArraySelectorMixin(Polymer.Element),ArraySelector=/*#__PURE__*/function(_baseArraySelector){babelHelpers.inherits(ArraySelector,_baseArraySelector);var _super2=_createSuper(ArraySelector);function ArraySelector(){babelHelpers.classCallCheck(this,ArraySelector);return _super2.apply(this,arguments)}babelHelpers.createClass(ArraySelector,null,[{key:"is",// Not needed to find template; can be removed once the analyzer
+   */var baseArraySelector=ArraySelectorMixin(Polymer.Element),ArraySelector=/*#__PURE__*/function(_baseArraySelector){babelHelpers.inherits(ArraySelector,_baseArraySelector);var _super2=_createSuper(ArraySelector);function ArraySelector(){babelHelpers.classCallCheck(this,ArraySelector);return _super2.apply(this,arguments)}babelHelpers.createClass(ArraySelector,null,[{key:"is",get:// Not needed to find template; can be removed once the analyzer
 // can find the tag name from customElements.define call
-get:function get(){return"array-selector"}}]);return ArraySelector}(baseArraySelector);/**
+function get(){return"array-selector"}}]);return ArraySelector}(baseArraySelector);/**
    * Element implementing the `Polymer.ArraySelector` mixin, which records
    * dynamic associations between item paths in a master `items` array and a
    * `selected` array such that path changes to the master array (at the host)
@@ -5892,7 +5892,7 @@
 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 Code distributed by Google as part of the polymer project is also
 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
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      * concatenated to this element's `<style>`.
@@ -5907,7 +5907,7 @@
 
       The ordering of `<custom-style>` should stay the same as when loaded by HTML Imports, but there may be odd
       cases of ordering w.r.t the main document styles.
-      */if(this.ownerDocument!==window.document){window.document.head.appendChild(this)}return this._style}}]);return CustomStyle}(/*#__PURE__*/babelHelpers.wrapNativeSuper(HTMLElement));window.customElements.define("custom-style",CustomStyle);/** @const */Polymer.CustomStyle=CustomStyle})();</script><script>(function(){'use strict';var mutablePropertyChange;/** @suppress {missingProperties} */(function(){mutablePropertyChange=Polymer.MutableData._mutablePropertyChange})();/**
+      */if(this.ownerDocument!==window.document){window.document.head.appendChild(this)}return this._style}}]);return CustomStyle}(/*#__PURE__*/babelHelpers.wrapNativeSuper(HTMLElement));window.customElements.define("custom-style",CustomStyle);/** @const */Polymer.CustomStyle=CustomStyle})();</script><script>(function(){"use strict";var mutablePropertyChange;/** @suppress {missingProperties} */(function(){mutablePropertyChange=Polymer.MutableData._mutablePropertyChange})();/**
    * Legacy element behavior to skip strict dirty-checking for objects and arrays,
    * (always consider them to be "dirty") for use on legacy API Polymer elements.
    *
@@ -6022,7 +6022,7 @@
      * @protected
      */_shouldPropertyChange:function _shouldPropertyChange(property,value,old){return mutablePropertyChange(this,property,value,old,this.mutableData)}}})();</script><script>// bc
 Polymer.Base=Polymer.LegacyElementMixin(HTMLElement).prototype;// NOTE: this is here for modulizer to export `html` for the module version of this file
-Polymer.html=Polymer.html;</script><script>(function(){'use strict';var workingURL,urlDoc,urlBase,anchor;/**
+Polymer.html=Polymer.html;</script><script>(function(){"use strict";var workingURL,urlDoc,urlBase,anchor;/**
    * @param {string} path
    * @param {string=} base
    * @return {!URL|!HTMLAnchorElement}
@@ -6103,13 +6103,13 @@
 var urlHost=url.host,urlPort=url.port,urlProtocol=url.protocol,isExtraneousHTTPS="https:"===urlProtocol&&"443"===urlPort,isExtraneousHTTP="http:"===urlProtocol&&"80"===urlPort;if(isExtraneousHTTPS||isExtraneousHTTP){urlHost=url.hostname}urlOrigin=urlProtocol+"//"+urlHost}if(urlOrigin!==origin){return null}var normalizedHref=url.pathname+url.search+url.hash;// pathname should start with '/', but may not if `new URL` is not supported
 if("/"!==normalizedHref[0]){normalizedHref="/"+normalizedHref}// If we've been configured not to handle this url... don't handle it!
 if(this._urlSpaceRegExp&&!this._urlSpaceRegExp.test(normalizedHref)){return null}// Need to use a full URL in case the containing page has a base URI.
-var fullNormalizedHref=resolveURL(normalizedHref,this.__location.href).href;return fullNormalizedHref},_makeRegExp:function _makeRegExp(urlSpaceRegex){return RegExp(urlSpaceRegex)}})})();</script><script>'use strict';Polymer({is:"iron-query-params",properties:{/**
+var fullNormalizedHref=resolveURL(normalizedHref,this.__location.href).href;return fullNormalizedHref},_makeRegExp:function _makeRegExp(urlSpaceRegex){return RegExp(urlSpaceRegex)}})})();</script><script>"use strict";Polymer({is:"iron-query-params",properties:{/**
        * @type{string|undefined}
        */paramsString:{type:String,notify:!0,observer:"paramsStringChanged"},/**
        * @type{Object|undefined}
        */paramsObject:{type:Object,notify:!0},_dontReact:{type:Boolean,value:!1}},hostAttributes:{hidden:!0},observers:["paramsObjectChanged(paramsObject.*)"],paramsStringChanged:function paramsStringChanged(){this._dontReact=!0;this.paramsObject=this._decodeParams(this.paramsString);this._dontReact=!1},paramsObjectChanged:function paramsObjectChanged(){if(this._dontReact){return}this.paramsString=this._encodeParams(this.paramsObject).replace(/%3F/g,"?").replace(/%2F/g,"/").replace(/'/g,"%27")},_encodeParams:function _encodeParams(params){var encodedParams=[];for(var key in params){var value=params[key];if(""===value){encodedParams.push(encodeURIComponent(key))}else if(value){encodedParams.push(encodeURIComponent(key)+"="+encodeURIComponent(value.toString()))}}return encodedParams.join("&")},_decodeParams:function _decodeParams(paramString){var params={};// Work around a bug in decodeURIComponent where + is not
 // converted to spaces:
-paramString=(paramString||"").replace(/\+/g,"%20");for(var paramList=paramString.split("&"),i=0,param;i<paramList.length;i++){param=paramList[i].split("=");if(param[0]){params[decodeURIComponent(param[0])]=decodeURIComponent(param[1]||"")}}return params}});</script><script>(function(){'use strict';/**
+paramString=(paramString||"").replace(/\+/g,"%20");for(var paramList=paramString.split("&"),i=0,param;i<paramList.length;i++){param=paramList[i].split("=");if(param[0]){params[decodeURIComponent(param[0])]=decodeURIComponent(param[1]||"")}}return params}});</script><script>(function(){"use strict";/**
    * Provides bidirectional mapping between `path` and `queryParams` and a
    * app-route compatible `route` object.
    *
@@ -6142,7 +6142,7 @@
      *
      * @param  {Object} queryParams A set of key/value pairs that are
      * universally accessible to branches of the route tree.
-     */_routeQueryParamsChanged:function _routeQueryParamsChanged(queryParams){if(!this.route){return}this.queryParams=queryParams}}})();</script><dom-module id="app-location" assetpath="../../app-route/"><template><iron-query-params params-string="{{__query}}" params-object="{{queryParams}}"></iron-query-params><iron-location path="{{__path}}" query="{{__query}}" hash="{{__hash}}" url-space-regex="[[urlSpaceRegex]]" dwell-time="[[dwellTime]]"></iron-location></template><script>(function(){'use strict';Polymer({is:"app-location",properties:{/**
+     */_routeQueryParamsChanged:function _routeQueryParamsChanged(queryParams){if(!this.route){return}this.queryParams=queryParams}}})();</script><dom-module id="app-location" assetpath="../../app-route/"><template><iron-query-params params-string="{{__query}}" params-object="{{queryParams}}"></iron-query-params><iron-location path="{{__path}}" query="{{__query}}" hash="{{__hash}}" url-space-regex="[[urlSpaceRegex]]" dwell-time="[[dwellTime]]"></iron-location></template><script>(function(){"use strict";Polymer({is:"app-location",properties:{/**
          * A model representing the deserialized path through the route tree, as
          * well as the current queryParams.
          */route:{type:Object,notify:!0},/**
@@ -6190,7 +6190,7 @@
          * user's browser history. Disable by setting to a negative number.
          *
          * See `iron-location` for more information.
-         */dwellTime:{type:Number}},behaviors:[Polymer.AppRouteConverterBehavior],observers:["__computeRoutePath(useHashAsPath, __hash, __path)"],ready:function ready(){this._isReady=!0},__computeRoutePath:function __computeRoutePath(){this.path=this.useHashAsPath?this.__hash:this.__path},__onPathChanged:function __onPathChanged(){if(!this._isReady){return}if(this.useHashAsPath){this.__hash=this.path}else{this.__path=this.path}}})})();</script></dom-module><script>(function(){'use strict';Polymer({is:"app-route",properties:{/**
+         */dwellTime:{type:Number}},behaviors:[Polymer.AppRouteConverterBehavior],observers:["__computeRoutePath(useHashAsPath, __hash, __path)"],ready:function ready(){this._isReady=!0},__computeRoutePath:function __computeRoutePath(){this.path=this.useHashAsPath?this.__hash:this.__path},__onPathChanged:function __onPathChanged(){if(!this._isReady){return}if(this.useHashAsPath){this.__hash=this.path}else{this.__path=this.path}}})})();</script></dom-module><script>(function(){"use strict";Polymer({is:"app-route",properties:{/**
        * The URL component managed by this element.
        */route:{type:Object,notify:!0},/**
        * The pattern of slash-separated segments to match `route.path` against.
@@ -6237,7 +6237,7 @@
 //
 //     Be ye so warned.
 for(var property in setObj){this._propertySetter(property,setObj[property])}// notify in a specific order
-if(setObj.data!==void 0){this._pathEffector("data",this.data);this._notifyChange("data")}if(setObj.active!==void 0){this._pathEffector("active",this.active);this._notifyChange("active")}if(setObj.tail!==void 0){this._pathEffector("tail",this.tail);this._notifyChange("tail")}}})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){var version=window.Polymer&&window.Polymer.version,useHtmlImports=version&&0===version.indexOf("2"),loadScript=function loadScript(path){var script=document.body.querySelector("script[src=\""+path+"\"][async]");// if the script already loaded, resolve immediately
+if(setObj.data!==void 0){this._pathEffector("data",this.data);this._notifyChange("data")}if(setObj.active!==void 0){this._pathEffector("active",this.active);this._notifyChange("active")}if(setObj.tail!==void 0){this._pathEffector("tail",this.tail);this._notifyChange("tail")}}})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){var version=window.Polymer&&window.Polymer.version,useHtmlImports=version&&0===version.indexOf("2"),loadScript=function loadScript(path){var script=document.body.querySelector("script[src=\""+path+"\"][async]");// if the script already loaded, resolve immediately
 if(script&&script.parentNode===document.body&&script.__dynamicImportLoaded){return Promise.resolve()}return new Promise(function(resolve,reject){script=document.createElement("script");script.setAttribute("src",path);// only use ES modules for Polymer 3
 if(!useHtmlImports){script.setAttribute("type","module")}script.async=!0;script.onreadystatechange=script.onload=function(e){script.__dynamicImportLoaded=!0;resolve(e)};script.onerror=function(e){// In case of an error, remove the script from the document so that it
 // will be automatically created again the next time
@@ -6250,13 +6250,13 @@
       MAGI ADD END */}}]);return VaadinFetchDemoDataMixin}(superClass)}})();</script><dom-module id="vaadin-component-demo-shared-styles" assetpath="../../vaadin-demo-helpers/"><template><style>body{font-family:-apple-system, BlinkMacSystemFont, "Roboto", "Segoe UI", Ubuntu, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";-webkit-text-size-adjust:100%;margin:0 1em 2em;}:host{line-height:1.6;color:#36393d;}h3{color:#2d3033;font-weight:300;font-size:1.66667rem;margin-bottom:1rem;line-height:1.5;}h4{font-weight:300;text-transform:uppercase;letter-spacing:.15em;font-size:1rem;margin-bottom:1rem;margin-top:1.13333rem;line-height:1.4;}code{font-family:"Source Code Pro", "Consolas", "Bitstream Vera Sans Mono", "Courier New", Courier, monospace;font-size:0.875em;}a{text-decoration:none;color:#00b4f0;transition:all .2s ease-in-out;}a:hover,
       a:focus{color:#57d5ff;}</style></template></dom-module><dom-module id="vaadin-component-demo" assetpath="../../vaadin-demo-helpers/"><template><style>:host{display:block;max-width:60em;margin-left:auto;margin-right:auto;}nav{box-shadow:inset 0 -1px 0 0 rgba(0, 0, 0, 0.1);margin-bottom:3em;overflow:auto;-webkit-overflow-scrolling:touch;}nav ul{padding:0;margin:0;display:flex;}nav ul li{list-style:none;flex:none;}nav a{display:inline-block;padding:1em;}nav a{color:#829191;text-decoration:none;border-bottom:2px solid transparent;}nav a:focus,
       nav a:hover,
-      nav a[active]{color:#2d3033;}nav a[active]{border-color:#44d62c;}</style><app-location id="appLocation" route="{{route}}" use-hash-as-path="[[devMode]]" url-space-regex="[[urlSpaceRegex]]"></app-location><app-route id="appRoute" route="{{route}}" pattern="[[routePattern]]:page" data="{{routeData}}"></app-route><nav id="nav"><ul><template is="dom-repeat" items="[[_demoConfig.pages]]" as="page" id="navigationRepeat"><li><a href$="[[linkBase]][[page.url]]" name$="[[page.url]]">[[page.name]]</a></li></template></ul></nav><div id="demo"></div></template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}var VaadinComponentDemo=/*#__PURE__*/function(_Vaadin$FetchDemoData){babelHelpers.inherits(VaadinComponentDemo,_Vaadin$FetchDemoData);var _super=_createSuper(VaadinComponentDemo);function VaadinComponentDemo(){babelHelpers.classCallCheck(this,VaadinComponentDemo);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinComponentDemo,[{key:"_isDevMode",value:function _isDevMode(baseHref){// FIXME: find a better way to detect when demo is running in flow
+      nav a[active]{color:#2d3033;}nav a[active]{border-color:#44d62c;}</style><app-location id="appLocation" route="{{route}}" use-hash-as-path="[[devMode]]" url-space-regex="[[urlSpaceRegex]]"></app-location><app-route id="appRoute" route="{{route}}" pattern="[[routePattern]]:page" data="{{routeData}}"></app-route><nav id="nav"><ul><template is="dom-repeat" items="[[_demoConfig.pages]]" as="page" id="navigationRepeat"><li><a href$="[[linkBase]][[page.url]]" name$="[[page.url]]">[[page.name]]</a></li></template></ul></nav><div id="demo"></div></template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}var VaadinComponentDemo=/*#__PURE__*/function(_Vaadin$FetchDemoData){babelHelpers.inherits(VaadinComponentDemo,_Vaadin$FetchDemoData);var _super=_createSuper(VaadinComponentDemo);function VaadinComponentDemo(){babelHelpers.classCallCheck(this,VaadinComponentDemo);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinComponentDemo,[{key:"_isDevMode",value:function _isDevMode(baseHref){// FIXME: find a better way to detect when demo is running in flow
 return /^cdn|github\.io|appspot\.com$/.test(location.hostname)||/\/components\/[a-z\-]+\/demo/.test(baseHref)}// Use hash fragment for navigation if we are using polyserve URL
 },{key:"_getLinkBase",value:function _getLinkBase(devMode,baseHref){return!devMode?baseHref+"/":"#"}},{key:"_getRoutePattern",value:function _getRoutePattern(devMode,linkBase){return!devMode?linkBase:""}},{key:"ready",value:function ready(){var _this=this;babelHelpers.get(babelHelpers.getPrototypeOf(VaadinComponentDemo.prototype),"ready",this).call(this);if(!this.srcBaseHref){this.srcBaseHref=this.baseHref}this.$.navigationRepeat.addEventListener("dom-change",function(){_this.navigationRepeatReady=!0});if(!this.urlSpaceRegex){this.urlSpaceRegex=this.baseHref.replace(/\//g,"\\/")}}},{key:"_routePageChanged",value:function _routePageChanged(page,navigationRepeatReady){if(!page)return;this.selectedPage=page;if(navigationRepeatReady){Array.from(this.$.nav.querySelectorAll("a")).forEach(function(e){return e.removeAttribute("active")});var activeLink=this.$.nav.querySelector("a[name=\""+page+"\"]");activeLink.setAttribute("active","");activeLink.scrollIntoView()}}},{key:"_configChanged",value:function _configChanged(configSrc){var _this2=this;if(configSrc){this.fetchJSON(configSrc).then(function(json){_this2._demoConfig=json;_this2.selectedPage=void 0;if(json.pages&&0<json.pages.length){// Select first page by default and update url
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 baseHref:{type:String,value:function value(){return window.location.pathname.replace(/\/([^\/]+\.[^\/]+|)?$/,"")}},// Base url for resolving relative imports
 srcBaseHref:String,selectedPage:{type:String,observer:"_pageChanged"},_demoConfig:Object,routeData:Object,// Navigation url scope regex
-urlSpaceRegex:String,devMode:{type:Boolean,computed:"_isDevMode(baseHref)"},linkBase:{type:String,computed:"_getLinkBase(devMode, baseHref)"},routePattern:{type:String,computed:"_getRoutePattern(devMode, linkBase)"},navigationRepeatReady:{type:Boolean,value:!1}}}},{key:"observers",get:function get(){return["_routePageChanged(routeData.page, navigationRepeatReady)"]}}]);return VaadinComponentDemo}(Vaadin.FetchDemoDataMixin(Polymer.Element));window.customElements.define(VaadinComponentDemo.is,VaadinComponentDemo);</script></dom-module><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}var emitted=[];/**
+urlSpaceRegex:String,devMode:{type:Boolean,computed:"_isDevMode(baseHref)"},linkBase:{type:String,computed:"_getLinkBase(devMode, baseHref)"},routePattern:{type:String,computed:"_getRoutePattern(devMode, linkBase)"},navigationRepeatReady:{type:Boolean,value:!1}}}},{key:"observers",get:function get(){return["_routePageChanged(routeData.page, navigationRepeatReady)"]}}]);return VaadinComponentDemo}(Vaadin.FetchDemoDataMixin(Polymer.Element));window.customElements.define(VaadinComponentDemo.is,VaadinComponentDemo);</script></dom-module><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}var emitted=[];/**
    * @namespace
    */window.addDemoReadyListener=function(demoId,callback){var listenerFunction=function listenerFunction(evt){var snippet=evt.detail.host.shadowRoot.querySelector(demoId),sdRenderer=snippet.shadowRoot.querySelector("vaadin-demo-shadow-dom-renderer");if(sdRenderer){window.removeEventListener("VaadinDemoReady",listenerFunction);emitted.push(demoId);callback(sdRenderer.shadowRoot,snippet.querySelector("template").content)}};window.addEventListener("VaadinDemoReady",listenerFunction)};/**
    * @namespace
@@ -6266,7 +6266,7 @@
  * marked - a markdown parser
  * Copyright (c) 2011-2014, Christopher Jeffrey. (MIT Licensed)
  * https://github.com/markedjs/marked
- */;(function(root){'use strict';/**
+ */;(function(root){"use strict";/**
  * Block-Level Grammar
  */var block={newline:/^\n+/,code:/^( {4}[^\n]+\n*)+/,fences:noop,hr:/^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,heading:/^ *(#{1,6}) *([^\n]+?) *#* *(?:\n+|$)/,nptable:noop,blockquote:/^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,list:/^( *)(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?!\1bull )\n*|\s*$)/,html:/^ *(?:comment *(?:\n|\s*$)|closed *(?:\n{2,}|\s*$)|closing *(?:\n{2,}|\s*$))/,def:/^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,table:noop,lheading:/^([^\n]+)\n *(=|-){2,} *(?:\n+|$)/,paragraph:/^([^\n]+(?:\n?(?!hr|heading|lheading| {0,3}>|tag)[^\n]+)+)/,text:/^[^\n]+/,_label:/(?:\\[\[\]]|[^\[\]])+/,_title:/(?:"(?:\\"|[^"]|"[^"\n]*")*"|'\n?(?:[^'\n]+\n?)*'|\([^()]*\))/};block.def=edit(block.def).replace("label",block._label).replace("title",block._title).getRegex();block.bullet=/(?:[*+-]|\d+\.)/;block.item=/^( *)(bull) [^\n]*(?:\n(?!\1bull )[^\n]*)*/;block.item=edit(block.item,"gm").replace(/bull/g,block.bullet).getRegex();block.list=edit(block.list).replace(/bull/g,block.bullet).replace("hr","\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))").replace("def","\\n+(?="+block.def.source+")").getRegex();block._tag="(?!(?:"+"a|em|strong|small|s|cite|q|dfn|abbr|data|time|code"+"|var|samp|kbd|sub|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo"+"|span|br|wbr|ins|del|img)\\b)\\w+(?!:|[^\\w\\s@]*@)\\b";block.html=edit(block.html).replace("comment",/\x3c!--[\s\S]*?--\x3e/).replace("closed",/<(tag)[\s\S]+?<\/\1>/).replace("closing",/<tag(?:"[^"]*"|'[^']*'|\s[^'"\/>\s]*)*?\/?>/).replace(/tag/g,block._tag).getRegex();block.paragraph=edit(block.paragraph).replace("hr",block.hr).replace("heading",block.heading).replace("lheading",block.lheading).replace("tag","<"+block._tag).getRegex();block.blockquote=edit(block.blockquote).replace("paragraph",block.paragraph).getRegex();/**
  * Normal Block Grammar
@@ -6394,7 +6394,7 @@
  * Expose
  */marked.Parser=Parser;marked.parser=Parser.parse;marked.Renderer=Renderer;marked.TextRenderer=TextRenderer;marked.Lexer=Lexer;marked.lexer=Lexer.lex;marked.InlineLexer=InlineLexer;marked.inlineLexer=InlineLexer.output;marked.parse=marked;if("undefined"!==typeof module&&"object"===("undefined"===typeof exports?"undefined":babelHelpers.typeof(exports))){module.exports=marked}else if("function"===typeof define&&define.amd){define(function(){return marked})}else{root.marked=marked}})(this||("undefined"!==typeof window?window:global));</script><script>if(!window.marked){// For webpack support for the Polymer 3 version created by the Polymer Modulizer
 // More info: https://github.com/PolymerElements/marked-element/issues/81
-window.marked=require("../../marked/lib/marked.js")}</script><dom-module id="marked-element" assetpath="../../marked-element/"><template><style>:host{display:block;}</style><slot name="markdown-html"><div id="content"></div></slot></template></dom-module><script>'use strict';Polymer({is:"marked-element",properties:{/**
+window.marked=require("../../marked/lib/marked.js")}</script><dom-module id="marked-element" assetpath="../../marked-element/"><template><style>:host{display:block;}</style><slot name="markdown-html"><div id="content"></div></slot></template></dom-module><script>"use strict";Polymer({is:"marked-element",properties:{/**
        * The markdown source that should be rendered by this element.
        */markdown:{type:String,value:null},/**
        * Enable GFM line breaks (regular newlines instead of two spaces for breaks)
@@ -6496,29 +6496,7 @@
 :{}// if in node js
 ,Prism=function(_self){// Private helper vars
 var lang=/\blang(?:uage)?-([\w-]+)\b/i,uniqueId=0,_={manual:_self.Prism&&_self.Prism.manual,disableWorkerMessageHandler:_self.Prism&&_self.Prism.disableWorkerMessageHandler,util:{encode:function encode(tokens){if(babelHelpers.instanceof(tokens,Token)){return new Token(tokens.type,_.util.encode(tokens.content),tokens.alias)}else if(Array.isArray(tokens)){return tokens.map(_.util.encode)}else{return tokens.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/\u00a0/g," ")}},type:function type(o){return Object.prototype.toString.call(o).slice(8,-1)},objId:function objId(obj){if(!obj.__id){Object.defineProperty(obj,"__id",{value:++uniqueId})}return obj.__id},// Deep clone a language definition (e.g. to extend it)
-clone:function deepClone(o,visited){var clone,id,type=_.util.type(o);visited=visited||{};switch(type){case"Object":id=_.util.objId(o);if(visited[id]){return visited[id]}clone={};visited[id]=clone;for(var key in o){if(o.hasOwnProperty(key)){clone[key]=deepClone(o[key],visited)}}return clone;case"Array":id=_.util.objId(o);if(visited[id]){return visited[id]}clone=[];visited[id]=clone;o.forEach(function(v,i){clone[i]=deepClone(v,visited)});return clone;default:return o;}},/**
-		 * Returns the Prism language of the given element set by a `language-xxxx` or `lang-xxxx` class.
-		 *
-		 * If no language is set for the element or the element is `null` or `undefined`, `none` will be returned.
-		 *
-		 * @param {Element} element
-		 * @returns {string}
-		 */getLanguage:function getLanguage(element){while(element&&!lang.test(element.className)){element=element.parentElement}if(element){return(element.className.match(lang)||[,"none"])[1].toLowerCase()}return"none"},/**
-		 * Returns the script element that is currently executing.
-		 *
-		 * This does __not__ work for line script element.
-		 *
-		 * @returns {HTMLScriptElement | null}
-		 */currentScript:function currentScript(){if("undefined"===typeof document){return null}if("currentScript"in document){return document.currentScript}// IE11 workaround
-// we'll get the src of the current script by parsing IE11's error stack trace
-// this will not work for inline scripts
-try{throw new Error}catch(err){// Get file src url from stack. Specifically works with the format of stack traces in IE.
-// A stack will look like this:
-//
-// Error
-//    at _.util.currentScript (http://localhost/components/prism-core.js:119:5)
-//    at Global code (http://localhost/components/prism-core.js:606:1)
-var src=(/at [^(\r\n]*\((.*):.+:.+\)$/i.exec(err.stack)||[])[1];if(src){var scripts=document.getElementsByTagName("script");for(var i in scripts){if(scripts[i].src==src){return scripts[i]}}}return null}}},languages:{extend:function extend(id,redef){var lang=_.util.clone(_.languages[id]);for(var key in redef){lang[key]=redef[key]}return lang},/**
+clone:function deepClone(o,visited){var clone,id,type=_.util.type(o);visited=visited||{};switch(type){case"Object":id=_.util.objId(o);if(visited[id]){return visited[id]}clone={};visited[id]=clone;for(var key in o){if(o.hasOwnProperty(key)){clone[key]=deepClone(o[key],visited)}}return clone;case"Array":id=_.util.objId(o);if(visited[id]){return visited[id]}clone=[];visited[id]=clone;o.forEach(function(v,i){clone[i]=deepClone(v,visited)});return clone;default:return o;}}},languages:{extend:function extend(id,redef){var lang=_.util.clone(_.languages[id]);for(var key in redef){lang[key]=redef[key]}return lang},/**
 		 * Insert a token before another token in a language literal
 		 * As this needs to recreate the object (we cannot actually insert before keys in object literals),
 		 * we cannot just provide an object, we need an object and a key.
@@ -6529,33 +6507,27 @@
 		 */insertBefore:function insertBefore(inside,before,insert,root){root=root||_.languages;var grammar=root[inside],ret={};for(var token in grammar){if(grammar.hasOwnProperty(token)){if(token==before){for(var newToken in insert){if(insert.hasOwnProperty(newToken)){ret[newToken]=insert[newToken]}}}// Do not insert token which also occur in insert. See #1525
 if(!insert.hasOwnProperty(token)){ret[token]=grammar[token]}}}var old=root[inside];root[inside]=ret;// Update references in other language definitions
 _.languages.DFS(_.languages,function(key,value){if(value===old&&key!=inside){this[key]=ret}});return ret},// Traverse a language definition with Depth First Search
-DFS:function DFS(o,callback,type,visited){visited=visited||{};var objId=_.util.objId;for(var i in o){if(o.hasOwnProperty(i)){callback.call(o,i,o[i],type||i);var property=o[i],propertyType=_.util.type(property);if("Object"===propertyType&&!visited[objId(property)]){visited[objId(property)]=!0;DFS(property,callback,null,visited)}else if("Array"===propertyType&&!visited[objId(property)]){visited[objId(property)]=!0;DFS(property,callback,i,visited)}}}}},plugins:{},highlightAll:function highlightAll(async,callback){_.highlightAllUnder(document,async,callback)},highlightAllUnder:function highlightAllUnder(container,async,callback){var env={callback:callback,container:container,selector:"code[class*=\"language-\"], [class*=\"language-\"] code, code[class*=\"lang-\"], [class*=\"lang-\"] code"};_.hooks.run("before-highlightall",env);env.elements=Array.prototype.slice.apply(env.container.querySelectorAll(env.selector));_.hooks.run("before-all-elements-highlight",env);for(var i=0,element;element=env.elements[i++];){_.highlightElement(element,!0===async,env.callback)}},highlightElement:function highlightElement(element,async,callback){// Find language
-var language=_.util.getLanguage(element),grammar=_.languages[language];// Set language on the element, if not present
-element.className=element.className.replace(lang,"").replace(/\s+/g," ")+" language-"+language;// Set language on the parent, for styling
-var parent=element.parentNode;if(parent&&"pre"===parent.nodeName.toLowerCase()){parent.className=parent.className.replace(lang,"").replace(/\s+/g," ")+" language-"+language}var code=element.textContent,env={element:element,language:language,grammar:grammar,code:code};function insertHighlightedCode(highlightedCode){env.highlightedCode=highlightedCode;_.hooks.run("before-insert",env);env.element.innerHTML=env.highlightedCode;_.hooks.run("after-highlight",env);_.hooks.run("complete",env);callback&&callback.call(env.element)}_.hooks.run("before-sanity-check",env);if(!env.code){_.hooks.run("complete",env);callback&&callback.call(env.element);return}_.hooks.run("before-highlight",env);if(!env.grammar){insertHighlightedCode(_.util.encode(env.code));return}if(async&&_self.Worker){var worker=new Worker(_.filename);worker.onmessage=function(evt){insertHighlightedCode(evt.data)};worker.postMessage(JSON.stringify({language:env.language,code:env.code,immediateClose:!0}))}else{insertHighlightedCode(_.highlight(env.code,env.grammar,env.language))}},highlight:function highlight(text,grammar,language){var env={code:text,grammar:grammar,language:language};_.hooks.run("before-tokenize",env);env.tokens=_.tokenize(env.code,env.grammar);_.hooks.run("after-tokenize",env);return Token.stringify(_.util.encode(env.tokens),env.language)},matchGrammar:function matchGrammar(text,strarr,grammar,index,startPos,oneshot,target){for(var token in grammar){if(!grammar.hasOwnProperty(token)||!grammar[token]){continue}var patterns=grammar[token];patterns=Array.isArray(patterns)?patterns:[patterns];for(var j=0;j<patterns.length;++j){if(target&&target==token+","+j){return}var pattern=patterns[j],inside=pattern.inside,lookbehind=!!pattern.lookbehind,greedy=!!pattern.greedy,lookbehindLength=0,alias=pattern.alias;if(greedy&&!pattern.pattern.global){// Without the global flag, lastIndex won't work
-var flags=pattern.pattern.toString().match(/[imsuy]*$/)[0];pattern.pattern=RegExp(pattern.pattern.source,flags+"g")}pattern=pattern.pattern||pattern;// Don’t cache length as it changes during the loop
+DFS:function DFS(o,callback,type,visited){visited=visited||{};var objId=_.util.objId;for(var i in o){if(o.hasOwnProperty(i)){callback.call(o,i,o[i],type||i);var property=o[i],propertyType=_.util.type(property);if("Object"===propertyType&&!visited[objId(property)]){visited[objId(property)]=!0;DFS(property,callback,null,visited)}else if("Array"===propertyType&&!visited[objId(property)]){visited[objId(property)]=!0;DFS(property,callback,i,visited)}}}}},plugins:{},highlightAll:function highlightAll(async,callback){_.highlightAllUnder(document,async,callback)},highlightAllUnder:function highlightAllUnder(container,async,callback){var env={callback:callback,selector:"code[class*=\"language-\"], [class*=\"language-\"] code, code[class*=\"lang-\"], [class*=\"lang-\"] code"};_.hooks.run("before-highlightall",env);for(var elements=container.querySelectorAll(env.selector),i=0,element;element=elements[i++];){_.highlightElement(element,!0===async,env.callback)}},highlightElement:function highlightElement(element,async,callback){// Find language
+var language="none",grammar,parent=element;while(parent&&!lang.test(parent.className)){parent=parent.parentNode}if(parent){language=(parent.className.match(lang)||[,"none"])[1].toLowerCase();grammar=_.languages[language]}// Set language on the element, if not present
+element.className=element.className.replace(lang,"").replace(/\s+/g," ")+" language-"+language;if(element.parentNode){// Set language on the parent, for styling
+parent=element.parentNode;if(/pre/i.test(parent.nodeName)){parent.className=parent.className.replace(lang,"").replace(/\s+/g," ")+" language-"+language}}var code=element.textContent,env={element:element,language:language,grammar:grammar,code:code},insertHighlightedCode=function insertHighlightedCode(highlightedCode){env.highlightedCode=highlightedCode;_.hooks.run("before-insert",env);env.element.innerHTML=env.highlightedCode;_.hooks.run("after-highlight",env);_.hooks.run("complete",env);callback&&callback.call(env.element)};_.hooks.run("before-sanity-check",env);if(!env.code){_.hooks.run("complete",env);return}_.hooks.run("before-highlight",env);if(!env.grammar){insertHighlightedCode(_.util.encode(env.code));return}if(async&&_self.Worker){var worker=new Worker(_.filename);worker.onmessage=function(evt){insertHighlightedCode(evt.data)};worker.postMessage(JSON.stringify({language:env.language,code:env.code,immediateClose:!0}))}else{insertHighlightedCode(_.highlight(env.code,env.grammar,env.language))}},highlight:function highlight(text,grammar,language){var env={code:text,grammar:grammar,language:language};_.hooks.run("before-tokenize",env);env.tokens=_.tokenize(env.code,env.grammar);_.hooks.run("after-tokenize",env);return Token.stringify(_.util.encode(env.tokens),env.language)},matchGrammar:function matchGrammar(text,strarr,grammar,index,startPos,oneshot,target){for(var token in grammar){if(!grammar.hasOwnProperty(token)||!grammar[token]){continue}if(token==target){return}var patterns=grammar[token];patterns="Array"===_.util.type(patterns)?patterns:[patterns];for(var j=0;j<patterns.length;++j){var pattern=patterns[j],inside=pattern.inside,lookbehind=!!pattern.lookbehind,greedy=!!pattern.greedy,lookbehindLength=0,alias=pattern.alias;if(greedy&&!pattern.pattern.global){// Without the global flag, lastIndex won't work
+var flags=pattern.pattern.toString().match(/[imuy]*$/)[0];pattern.pattern=RegExp(pattern.pattern.source,flags+"g")}pattern=pattern.pattern||pattern;// Don’t cache length as it changes during the loop
 for(var i=index,pos=startPos,str;i<strarr.length;pos+=strarr[i].length,++i){str=strarr[i];if(strarr.length>text.length){// Something went terribly wrong, ABORT, ABORT!
-return}if(babelHelpers.instanceof(str,Token)){continue}if(greedy&&i!=strarr.length-1){pattern.lastIndex=pos;var match=pattern.exec(text);if(!match){break}for(var from=match.index+(lookbehind&&match[1]?match[1].length:0),to=match.index+match[0].length,k=i,p=pos,len=strarr.length;k<len&&(p<to||!strarr[k].type&&!strarr[k-1].greedy);++k){p+=strarr[k].length;// Move the index i to the element in strarr that is closest to from
+return}if(babelHelpers.instanceof(str,Token)){continue}if(greedy&&i!=strarr.length-1){pattern.lastIndex=pos;var match=pattern.exec(text);if(!match){break}for(var from=match.index+(lookbehind?match[1].length:0),to=match.index+match[0].length,k=i,p=pos,len=strarr.length;k<len&&(p<to||!strarr[k].type&&!strarr[k-1].greedy);++k){p+=strarr[k].length;// Move the index i to the element in strarr that is closest to from
 if(from>=p){++i;pos=p}}// If strarr[i] is a Token, then the match starts inside another Token, which is invalid
 if(babelHelpers.instanceof(strarr[i],Token)){continue}// Number of tokens to delete and replace with the new match
-delNum=k-i;str=text.slice(pos,p);match.index-=pos}else{pattern.lastIndex=0;var match=pattern.exec(str),delNum=1}if(!match){if(oneshot){break}continue}if(lookbehind){lookbehindLength=match[1]?match[1].length:0}var from=match.index+lookbehindLength,match=match[0].slice(lookbehindLength),to=from+match.length,before=str.slice(0,from),after=str.slice(to),args=[i,delNum];if(before){++i;pos+=before.length;args.push(before)}var wrapped=new Token(token,inside?_.tokenize(match,inside):match,alias,match,greedy);args.push(wrapped);if(after){args.push(after)}Array.prototype.splice.apply(strarr,args);if(1!=delNum)_.matchGrammar(text,strarr,grammar,i,pos,!0,token+","+j);if(oneshot)break}}}},tokenize:function tokenize(text,grammar){var strarr=[text],rest=grammar.rest;if(rest){for(var token in rest){grammar[token]=rest[token]}delete grammar.rest}_.matchGrammar(text,strarr,grammar,0,0,!1);return strarr},hooks:{all:{},add:function add(name,callback){var hooks=_.hooks.all;hooks[name]=hooks[name]||[];hooks[name].push(callback)},run:function run(name,env){var callbacks=_.hooks.all[name];if(!callbacks||!callbacks.length){return}for(var i=0,callback;callback=callbacks[i++];){callback(env)}}},Token:Token};_self.Prism=_;function Token(type,content,alias,matchedStr,greedy){this.type=type;this.content=content;this.alias=alias;// Copy of the full string this token was created from
+delNum=k-i;str=text.slice(pos,p);match.index-=pos}else{pattern.lastIndex=0;var match=pattern.exec(str),delNum=1}if(!match){if(oneshot){break}continue}if(lookbehind){lookbehindLength=match[1]?match[1].length:0}var from=match.index+lookbehindLength,match=match[0].slice(lookbehindLength),to=from+match.length,before=str.slice(0,from),after=str.slice(to),args=[i,delNum];if(before){++i;pos+=before.length;args.push(before)}var wrapped=new Token(token,inside?_.tokenize(match,inside):match,alias,match,greedy);args.push(wrapped);if(after){args.push(after)}Array.prototype.splice.apply(strarr,args);if(1!=delNum)_.matchGrammar(text,strarr,grammar,i,pos,!0,token);if(oneshot)break}}}},tokenize:function tokenize(text,grammar){var strarr=[text],rest=grammar.rest;if(rest){for(var token in rest){grammar[token]=rest[token]}delete grammar.rest}_.matchGrammar(text,strarr,grammar,0,0,!1);return strarr},hooks:{all:{},add:function add(name,callback){var hooks=_.hooks.all;hooks[name]=hooks[name]||[];hooks[name].push(callback)},run:function run(name,env){var callbacks=_.hooks.all[name];if(!callbacks||!callbacks.length){return}for(var i=0,callback;callback=callbacks[i++];){callback(env)}}},Token:Token};_self.Prism=_;function Token(type,content,alias,matchedStr,greedy){this.type=type;this.content=content;this.alias=alias;// Copy of the full string this token was created from
 this.length=0|(matchedStr||"").length;this.greedy=!!greedy}Token.stringify=function(o,language){if("string"==typeof o){return o}if(Array.isArray(o)){return o.map(function(element){return Token.stringify(element,language)}).join("")}var env={type:o.type,content:Token.stringify(o.content,language),tag:"span",classes:["token",o.type],attributes:{},language:language};if(o.alias){var aliases=Array.isArray(o.alias)?o.alias:[o.alias];Array.prototype.push.apply(env.classes,aliases)}_.hooks.run("wrap",env);var attributes=Object.keys(env.attributes).map(function(name){return name+"=\""+(env.attributes[name]||"").replace(/"/g,"&quot;")+"\""}).join(" ");return"<"+env.tag+" class=\""+env.classes.join(" ")+"\""+(attributes?" "+attributes:"")+">"+env.content+"</"+env.tag+">"};if(!_self.document){if(!_self.addEventListener){// in Node.js
 return _}if(!_.disableWorkerMessageHandler){// In worker
 _self.addEventListener("message",function(evt){var message=JSON.parse(evt.data),lang=message.language,code=message.code,immediateClose=message.immediateClose;_self.postMessage(_.highlight(code,_.languages[lang],lang));if(immediateClose){_self.close()}},!1)}return _}//Get current script and highlight
-var script=_.util.currentScript();if(script){_.filename=script.src;if(script.hasAttribute("data-manual")){_.manual=!0}}if(!_.manual){var highlightAutomaticallyCallback=function highlightAutomaticallyCallback(){if(!_.manual){_.highlightAll()}},readyState=document.readyState;// If the document state is "loading", then we'll use DOMContentLoaded.
-// If the document state is "interactive" and the prism.js script is deferred, then we'll also use the
-// DOMContentLoaded event because there might be some plugins or languages which have also been deferred and they
-// might take longer one animation frame to execute which can create a race condition where only some plugins have
-// been loaded when Prism.highlightAll() is executed, depending on how fast resources are loaded.
-// See https://github.com/PrismJS/prism/issues/2102
-if("loading"===readyState||"interactive"===readyState&&script&&script.defer){document.addEventListener("DOMContentLoaded",highlightAutomaticallyCallback)}else{if(window.requestAnimationFrame){window.requestAnimationFrame(highlightAutomaticallyCallback)}else{window.setTimeout(highlightAutomaticallyCallback,16)}}}return _}(_self);/**
+var script=document.currentScript||[].slice.call(document.getElementsByTagName("script")).pop();if(script){_.filename=script.src;if(!_.manual&&!script.hasAttribute("data-manual")){if("loading"!==document.readyState){if(window.requestAnimationFrame){window.requestAnimationFrame(_.highlightAll)}else{window.setTimeout(_.highlightAll,16)}}else{document.addEventListener("DOMContentLoaded",_.highlightAll)}}}return _}(_self);/**
  * Prism: Lightweight, robust, elegant syntax highlighting
  * MIT license http://www.opensource.org/licenses/mit-license.php/
  * @author Lea Verou http://lea.verou.me
  */if("undefined"!==typeof module&&module.exports){module.exports=Prism}// hack for components to work correctly in node.js
 if("undefined"!==typeof global){global.Prism=Prism}/* **********************************************
      Begin prism-markup.js
-********************************************** */Prism.languages.markup={comment:/\x3c!--[\s\S]*?--\x3e/,prolog:/<\?[\s\S]+?\?>/,doctype:{pattern:/<!DOCTYPE(?:[^>"'[\]]|"[^"]*"|'[^']*')+(?:\[(?:(?!\x3c!--)[^"'\]]|"[^"]*"|'[^']*'|\x3c!--[\s\S]*?--\x3e)*\]\s*)?>/i,greedy:!0},cdata:/<!\[CDATA\[[\s\S]*?]]>/i,tag:{pattern:/<\/?(?!\d)[^\s>\/=$<%]+(?:\s(?:\s*[^\s>\/=]+(?:\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+(?=[\s>]))|(?=[\s/>])))+)?\s*\/?>/i,greedy:!0,inside:{tag:{pattern:/^<\/?[^\s>\/]+/i,inside:{punctuation:/^<\/?/,namespace:/^[^\s>\/:]+:/}},"attr-value":{pattern:/=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+)/i,inside:{punctuation:[/^=/,{pattern:/^(\s*)["']|["']$/,lookbehind:!0}]}},punctuation:/\/?>/,"attr-name":{pattern:/[^\s>\/]+/,inside:{namespace:/^[^\s>\/:]+:/}}}},entity:/&#?[\da-z]{1,8};/i};Prism.languages.markup.tag.inside["attr-value"].inside.entity=Prism.languages.markup.entity;// Plugin to make entity title show the real entity, idea by Roman Komarov
+********************************************** */Prism.languages.markup={comment:/\x3c!--[\s\S]*?--\x3e/,prolog:/<\?[\s\S]+?\?>/,doctype:/<!DOCTYPE[\s\S]+?>/i,cdata:/<!\[CDATA\[[\s\S]*?]]>/i,tag:{pattern:/<\/?(?!\d)[^\s>\/=$<%]+(?:\s(?:\s*[^\s>\/=]+(?:\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+(?=[\s>]))|(?=[\s/>])))+)?\s*\/?>/i,greedy:!0,inside:{tag:{pattern:/^<\/?[^\s>\/]+/i,inside:{punctuation:/^<\/?/,namespace:/^[^\s>\/:]+:/}},"attr-value":{pattern:/=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+)/i,inside:{punctuation:[/^=/,{pattern:/^(\s*)["']|["']$/,lookbehind:!0}]}},punctuation:/\/?>/,"attr-name":{pattern:/[^\s>\/]+/,inside:{namespace:/^[^\s>\/:]+:/}}}},entity:/&#?[\da-z]{1,8};/i};Prism.languages.markup.tag.inside["attr-value"].inside.entity=Prism.languages.markup.entity;// Plugin to make entity title show the real entity, idea by Roman Komarov
 Prism.hooks.add("wrap",function(env){if("entity"===env.type){env.attributes.title=env.content.replace(/&amp;/,"&")}});Object.defineProperty(Prism.languages.markup.tag,"addInlined",{/**
 	 * Adds an inlined language to markup.
 	 *
@@ -6571,10 +6543,10 @@
 ********************************************** */(function(Prism){var string=/("|')(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/;Prism.languages.css={comment:/\/\*[\s\S]*?\*\//,atrule:{pattern:/@[\w-]+[\s\S]*?(?:;|(?=\s*\{))/,inside:{rule:/@[\w-]+/ // See rest below
 }},url:{pattern:RegExp("url\\((?:"+string.source+"|[^\n\r()]*)\\)","i"),inside:{function:/^url/i,punctuation:/^\(|\)$/}},selector:RegExp("[^{}\\s](?:[^{};\"']|"+string.source+")*?(?=\\s*\\{)"),string:{pattern:string,greedy:!0},property:/[-_a-z\xA0-\uFFFF][-\w\xA0-\uFFFF]*(?=\s*:)/i,important:/!important\b/i,function:/[-a-z0-9]+(?=\()/i,punctuation:/[(){};:,]/};Prism.languages.css.atrule.inside.rest=Prism.languages.css;var markup=Prism.languages.markup;if(markup){markup.tag.addInlined("style","css");Prism.languages.insertBefore("inside","attr-value",{"style-attr":{pattern:/\s*style=("|')(?:\\[\s\S]|(?!\1)[^\\])*\1/i,inside:{"attr-name":{pattern:/^\s*style/i,inside:markup.tag.inside},punctuation:/^\s*=\s*['"]|['"]\s*$/,"attr-value":{pattern:/.+/i,inside:Prism.languages.css}},alias:"language-css"}},markup.tag)}})(Prism);/* **********************************************
      Begin prism-clike.js
-********************************************** */Prism.languages.clike={comment:[{pattern:/(^|[^\\])\/\*[\s\S]*?(?:\*\/|$)/,lookbehind:!0},{pattern:/(^|[^\\:])\/\/.*/,lookbehind:!0,greedy:!0}],string:{pattern:/(["'])(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,greedy:!0},"class-name":{pattern:/(\b(?:class|interface|extends|implements|trait|instanceof|new)\s+|\bcatch\s+\()[\w.\\]+/i,lookbehind:!0,inside:{punctuation:/[.\\]/}},keyword:/\b(?:if|else|while|do|for|return|in|instanceof|function|new|try|throw|catch|finally|null|break|continue)\b/,boolean:/\b(?:true|false)\b/,function:/\w+(?=\()/,number:/\b0x[\da-f]+\b|(?:\b\d+\.?\d*|\B\.\d+)(?:e[+-]?\d+)?/i,operator:/[<>]=?|[!=]=?=?|--?|\+\+?|&&?|\|\|?|[?*/~^%]/,punctuation:/[{}[\];(),.:]/};/* **********************************************
+********************************************** */Prism.languages.clike={comment:[{pattern:/(^|[^\\])\/\*[\s\S]*?(?:\*\/|$)/,lookbehind:!0},{pattern:/(^|[^\\:])\/\/.*/,lookbehind:!0,greedy:!0}],string:{pattern:/(["'])(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,greedy:!0},"class-name":{pattern:/((?:\b(?:class|interface|extends|implements|trait|instanceof|new)\s+)|(?:catch\s+\())[\w.\\]+/i,lookbehind:!0,inside:{punctuation:/[.\\]/}},keyword:/\b(?:if|else|while|do|for|return|in|instanceof|function|new|try|throw|catch|finally|null|break|continue)\b/,boolean:/\b(?:true|false)\b/,function:/\w+(?=\()/,number:/\b0x[\da-f]+\b|(?:\b\d+\.?\d*|\B\.\d+)(?:e[+-]?\d+)?/i,operator:/--?|\+\+?|!=?=?|<=?|>=?|==?=?|&&?|\|\|?|\?|\*|\/|~|\^|%/,punctuation:/[{}[\];(),.:]/};/* **********************************************
      Begin prism-javascript.js
 ********************************************** */Prism.languages.javascript=Prism.languages.extend("clike",{"class-name":[Prism.languages.clike["class-name"],{pattern:/(^|[^$\w\xA0-\uFFFF])[_$A-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\.(?:prototype|constructor))/,lookbehind:!0}],keyword:[{pattern:/((?:^|})\s*)(?:catch|finally)\b/,lookbehind:!0},{pattern:/(^|[^.])\b(?:as|async(?=\s*(?:function\b|\(|[$\w\xA0-\uFFFF]|$))|await|break|case|class|const|continue|debugger|default|delete|do|else|enum|export|extends|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|undefined|var|void|while|with|yield)\b/,lookbehind:!0}],number:/\b(?:(?:0[xX](?:[\dA-Fa-f](?:_[\dA-Fa-f])?)+|0[bB](?:[01](?:_[01])?)+|0[oO](?:[0-7](?:_[0-7])?)+)n?|(?:\d(?:_\d)?)+n|NaN|Infinity)\b|(?:\b(?:\d(?:_\d)?)+\.?(?:\d(?:_\d)?)*|\B\.(?:\d(?:_\d)?)+)(?:[Ee][+-]?(?:\d(?:_\d)?)+)?/,// Allow for all non-ASCII characters (See http://stackoverflow.com/a/2008444)
-function:/#?[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*(?:\.\s*(?:apply|bind|call)\s*)?\()/,operator:/--|\+\+|\*\*=?|=>|&&|\|\||[!=]==|<<=?|>>>?=?|[-+*/%&|^!=<>]=?|\.{3}|\?[.?]?|[~:]/});Prism.languages.javascript["class-name"][0].pattern=/(\b(?:class|interface|extends|implements|instanceof|new)\s+)[\w.\\]+/;Prism.languages.insertBefore("javascript","keyword",{regex:{pattern:/((?:^|[^$\w\xA0-\uFFFF."'\])\s])\s*)\/(?:\[(?:[^\]\\\r\n]|\\.)*]|\\.|[^/\\\[\r\n])+\/[gimyus]{0,6}(?=\s*(?:$|[\r\n,.;})\]]))/,lookbehind:!0,greedy:!0},// This must be declared before keyword because we use "function" inside the look-forward
+function:/#?[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*(?:\.\s*(?:apply|bind|call)\s*)?\()/,operator:/-[-=]?|\+[+=]?|!=?=?|<<?=?|>>?>?=?|=(?:==?|>)?|&[&=]?|\|[|=]?|\*\*?=?|\/=?|~|\^=?|%=?|\?|\.{3}/});Prism.languages.javascript["class-name"][0].pattern=/(\b(?:class|interface|extends|implements|instanceof|new)\s+)[\w.\\]+/;Prism.languages.insertBefore("javascript","keyword",{regex:{pattern:/((?:^|[^$\w\xA0-\uFFFF."'\])\s])\s*)\/(\[(?:[^\]\\\r\n]|\\.)*]|\\.|[^/\\\[\r\n])+\/[gimyus]{0,6}(?=\s*($|[\r\n,.;})\]]))/,lookbehind:!0,greedy:!0},// This must be declared before keyword because we use "function" inside the look-forward
 "function-variable":{pattern:/#?[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*[=:]\s*(?:async\s*)?(?:\bfunction\b|(?:\((?:[^()]|\([^()]*\))*\)|[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)\s*=>))/,alias:"function"},parameter:[{pattern:/(function(?:\s+[_$A-Za-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)?\s*\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\))/,lookbehind:!0,inside:Prism.languages.javascript},{pattern:/[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*=>)/i,inside:Prism.languages.javascript},{pattern:/(\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\)\s*=>)/,lookbehind:!0,inside:Prism.languages.javascript},{pattern:/((?:\b|\s|^)(?!(?:as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|undefined|var|void|while|with|yield)(?![$\w\xA0-\uFFFF]))(?:[_$A-Za-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*\s*)\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\)\s*\{)/,lookbehind:!0,inside:Prism.languages.javascript}],constant:/\b[A-Z](?:[A-Z_]|\dx?)*\b/});Prism.languages.insertBefore("javascript","string",{"template-string":{pattern:/`(?:\\[\s\S]|\${(?:[^{}]|{(?:[^{}]|{[^}]*})*})+}|(?!\${)[^\\`])*`/,greedy:!0,inside:{"template-punctuation":{pattern:/^`|`$/,alias:"string"},interpolation:{pattern:/((?:^|[^\\])(?:\\{2})*)\${(?:[^{}]|{(?:[^{}]|{[^}]*})*})+}/,lookbehind:!0,inside:{"interpolation-punctuation":{pattern:/^\${|}$/,alias:"punctuation"},rest:Prism.languages.javascript}},string:/[\s\S]+/}}});if(Prism.languages.markup){Prism.languages.markup.tag.addInlined("script","javascript")}Prism.languages.js=Prism.languages.javascript;/* **********************************************
      Begin prism-file-highlight.js
 ********************************************** */(function(){if("undefined"===typeof self||!self.Prism||!self.document||!document.querySelector){return}/**
@@ -6582,7 +6554,7 @@
 	 */self.Prism.fileHighlight=function(container){container=container||document;var Extensions={js:"javascript",py:"python",rb:"ruby",ps1:"powershell",psm1:"powershell",sh:"bash",bat:"batch",h:"c",tex:"latex"};Array.prototype.slice.call(container.querySelectorAll("pre[data-src]")).forEach(function(pre){// ignore if already loaded
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 var src=pre.getAttribute("data-src"),language,parent=pre,lang=/\blang(?:uage)?-([\w-]+)\b/i;while(parent&&!lang.test(parent.className)){parent=parent.parentNode}if(parent){language=(pre.className.match(lang)||[,""])[1]}if(!language){var extension=(src.match(/\.(\w+)$/)||[,""])[1];language=Extensions[extension]||extension}var code=document.createElement("code");code.className="language-"+language;pre.textContent="";code.textContent="Loading\u2026";pre.appendChild(code);var xhr=new XMLHttpRequest;xhr.open("GET",src,!0);xhr.onreadystatechange=function(){if(4==xhr.readyState){if(400>xhr.status&&xhr.responseText){code.textContent=xhr.responseText;Prism.highlightElement(code);// mark as loaded
-pre.setAttribute("data-src-loaded","")}else if(400<=xhr.status){code.textContent="\u2716 Error "+xhr.status+" while fetching file: "+xhr.statusText}else{code.textContent="\u2716 Error: File does not exist or is empty"}}};xhr.send(null)})};document.addEventListener("DOMContentLoaded",function(){// execute inside handler, for dropping Event as argument
+pre.setAttribute("data-src-loaded","")}else if(400<=xhr.status){code.textContent="\u2716 Error "+xhr.status+" while fetching file: "+xhr.statusText}else{code.textContent="\u2716 Error: File does not exist or is empty"}}};xhr.send(null)});if(Prism.plugins.toolbar){Prism.plugins.toolbar.registerButton("download-file",function(env){var pre=env.element.parentNode;if(!pre||!/pre/i.test(pre.nodeName)||!pre.hasAttribute("data-src")||!pre.hasAttribute("data-download-link")){return}var src=pre.getAttribute("data-src"),a=document.createElement("a");a.textContent=pre.getAttribute("data-download-link-label")||"Download";a.setAttribute("download","");a.href=src;return a})}};document.addEventListener("DOMContentLoaded",function(){// execute inside handler, for dropping Event as argument
 self.Prism.fileHighlight()})})();</script><style>code[class*="language-"],
 pre[class*="language-"]{color:black;background:none;text-shadow:0 1px white;font-family:Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;font-size:1em;text-align:left;white-space:pre;word-spacing:normal;word-break:normal;word-wrap:normal;line-height:1.5;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-hyphens:none;-moz-hyphens:none;-ms-hyphens:none;hyphens:none;}pre[class*="language-"]::-moz-selection, pre[class*="language-"] ::-moz-selection,
 code[class*="language-"]::-moz-selection, code[class*="language-"] ::-moz-selection{text-shadow:none;background:#b3d4fc;}pre[class*="language-"]::selection, pre[class*="language-"] ::selection,
@@ -6612,7 +6584,7 @@
 .token.class-name{color:#DD4A68;}.token.regex,
 .token.important,
 .token.variable{color:#e90;}.token.important,
-.token.bold{font-weight:bold;}.token.italic{font-style:italic;}.token.entity{cursor:help;}</style><script>(function(){'use strict';var HIGHLIGHT_EVENT="syntax-highlight";Polymer({is:"prism-highlighter",properties:{/**
+.token.bold{font-weight:bold;}.token.italic{font-style:italic;}.token.entity{cursor:help;}</style><script>(function(){"use strict";var HIGHLIGHT_EVENT="syntax-highlight";Polymer({is:"prism-highlighter",properties:{/**
        * Adds languages outside of the core Prism languages.
        *
        * Prism includes a few languages in the core library:
@@ -6645,12 +6617,12 @@
      */_detectLang:function _detectLang(code,lang){if(!lang){// Stupid simple detection if we have no lang, courtesy of:
 // https://github.com/robdodson/mark-down/blob/ac2eaa/mark-down.html#L93-101
 return code.match(/^\s*</)?Prism.languages.markup:Prism.languages.javascript}if(this.languages[lang]){return this.languages[lang]}else if(Prism.languages[lang]){return Prism.languages[lang]}switch(lang.substr(0,2)){case"js":case"es":return Prism.languages.javascript;case"c":return Prism.languages.clike;default:// The assumption is that you're mostly documenting HTML when in HTML.
-return Prism.languages.markup;}}})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}/**
+return Prism.languages.markup;}}})})();</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}/**
    * @namespace Vaadin
    */window.Vaadin=window.Vaadin||{};/**
    * @polymerMixin
    * @memberof Vaadin
-   */Vaadin.ThemePropertyMixin=function(superClass){return/*#__PURE__*/function(_superClass){babelHelpers.inherits(VaadinThemePropertyMixin,_superClass);var _super=_createSuper(VaadinThemePropertyMixin);function VaadinThemePropertyMixin(){babelHelpers.classCallCheck(this,VaadinThemePropertyMixin);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinThemePropertyMixin,[{key:"attributeChangedCallback",/** @protected */value:function attributeChangedCallback(name,oldValue,newValue){babelHelpers.get(babelHelpers.getPrototypeOf(VaadinThemePropertyMixin.prototype),"attributeChangedCallback",this).call(this,name,oldValue,newValue);if("theme"===name){this._setTheme(newValue)}}}],[{key:"properties",get:function get(){return{/**
+   */Vaadin.ThemePropertyMixin=function(superClass){return/*#__PURE__*/function(_superClass){babelHelpers.inherits(VaadinThemePropertyMixin,_superClass);var _super=_createSuper(VaadinThemePropertyMixin);function VaadinThemePropertyMixin(){babelHelpers.classCallCheck(this,VaadinThemePropertyMixin);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinThemePropertyMixin,[{key:"attributeChangedCallback",value:/** @protected */function attributeChangedCallback(name,oldValue,newValue){babelHelpers.get(babelHelpers.getPrototypeOf(VaadinThemePropertyMixin.prototype),"attributeChangedCallback",this).call(this,name,oldValue,newValue);if("theme"===name){this._setTheme(newValue)}}}],[{key:"properties",get:function get(){return{/**
          * Helper property with theme attribute value facilitating propagation
          * in shadow DOM.
          *
@@ -6666,21 +6638,21 @@
          * page for more information.
          *
          * @protected
-         */theme:{type:String,readOnly:!0}}}}]);return VaadinThemePropertyMixin}(superClass)};</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}/**
+         */theme:{type:String,readOnly:!0}}}}]);return VaadinThemePropertyMixin}(superClass)};</script><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}/**
    * @namespace Vaadin
    */window.Vaadin=window.Vaadin||{};/**
    * @polymerMixin
    * @memberof Vaadin
    * @mixes Vaadin.ThemePropertyMixin
-   */Vaadin.ThemableMixin=function(superClass){return/*#__PURE__*/function(_Vaadin$ThemeProperty){babelHelpers.inherits(VaadinThemableMixin,_Vaadin$ThemeProperty);var _super=_createSuper(VaadinThemableMixin);function VaadinThemableMixin(){babelHelpers.classCallCheck(this,VaadinThemableMixin);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinThemableMixin,null,[{key:"finalize",/** @protected */value:function finalize(){var _this=this;babelHelpers.get(babelHelpers.getPrototypeOf(VaadinThemableMixin),"finalize",this).call(this);var template=this.prototype._template,hasOwnTemplate=this.template&&this.template.parentElement&&this.template.parentElement.id===this.is,inheritedTemplate=Object.getPrototypeOf(this.prototype)._template;if(inheritedTemplate&&!hasOwnTemplate){// The element doesn't define its own template -> include the theme modules from the inherited template
+   */Vaadin.ThemableMixin=function(superClass){return/*#__PURE__*/function(_Vaadin$ThemeProperty){babelHelpers.inherits(VaadinThemableMixin,_Vaadin$ThemeProperty);var _super=_createSuper(VaadinThemableMixin);function VaadinThemableMixin(){babelHelpers.classCallCheck(this,VaadinThemableMixin);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinThemableMixin,null,[{key:"finalize",value:/** @protected */function finalize(){var _this=this;babelHelpers.get(babelHelpers.getPrototypeOf(VaadinThemableMixin),"finalize",this).call(this);var template=this.prototype._template,hasOwnTemplate=this.template&&this.template.parentElement&&this.template.parentElement.id===this.is,inheritedTemplate=Object.getPrototypeOf(this.prototype)._template;if(inheritedTemplate&&!hasOwnTemplate){// The element doesn't define its own template -> include the theme modules from the inherited template
 Array.from(inheritedTemplate.content.querySelectorAll("style[include]")).forEach(function(s){_this._includeStyle(s.getAttribute("include"),template)})}this._includeMatchingThemes(template)}/** @protected */},{key:"_includeMatchingThemes",value:function _includeMatchingThemes(template){var _this2=this,domModule=Polymer.DomModule,modules=domModule.prototype.modules,hasThemes=!1,defaultModuleName=this.is+"-default-theme";Object.keys(modules).sort(function(moduleNameA,moduleNameB){var vaadinA=0===moduleNameA.indexOf("vaadin-"),vaadinB=0===moduleNameB.indexOf("vaadin-"),vaadinThemePrefixes=["lumo-","material-"],vaadinThemeA=0<vaadinThemePrefixes.filter(function(prefix){return 0===moduleNameA.indexOf(prefix)}).length,vaadinThemeB=0<vaadinThemePrefixes.filter(function(prefix){return 0===moduleNameB.indexOf(prefix)}).length;if(vaadinA!==vaadinB){// Include vaadin core styles first
 return vaadinA?-1:1}else if(vaadinThemeA!==vaadinThemeB){// Include vaadin theme styles after that
 return vaadinThemeA?-1:1}else{// Lastly include custom styles so they override all vaadin styles
 return 0}}).forEach(function(moduleName){if(moduleName!==defaultModuleName){var themeFor=modules[moduleName].getAttribute("theme-for");if(themeFor){themeFor.split(" ").forEach(function(themeForToken){if(new RegExp("^"+themeForToken.split("*").join(".*")+"$").test(_this2.is)){hasThemes=!0;_this2._includeStyle(moduleName,template)}})}}});if(!hasThemes&&modules[defaultModuleName]){// No theme modules found, include the default module if it exists
-this._includeStyle(defaultModuleName,template)}}/** @private */},{key:"_includeStyle",value:function _includeStyle(moduleName,template){if(template&&!template.content.querySelector("style[include=\"".concat(moduleName,"\"]"))){var styleEl=document.createElement("style");styleEl.setAttribute("include",moduleName);template.content.appendChild(styleEl)}}}]);return VaadinThemableMixin}(Vaadin.ThemePropertyMixin(superClass))};</script><script>(function(){'use strict';window.Vaadin=window.Vaadin||{};Vaadin.LightDomHelper={querySelectorAsync:function querySelectorAsync(selector,context){if(!context){context=document}return new Promise(function(resolve,reject){var element=context.querySelector(selector);if(element){resolve(element)}else{var observer=new MutationObserver(function(){var element=context.querySelector(selector);if(element){observer.disconnect();resolve(element)}else{reject("no element matched the selector even after the first observed mutation")}});observer.observe(context,{childList:!0})}})},querySlotContentAsync:function querySlotContentAsync(selector,slot){var matchesFn=HTMLElement.prototype.matches?HTMLElement.prototype.matches:HTMLElement.prototype.msMatchesSelector,query=function query(slot,selector){for(var assignedNodes=slot.assignedNodes(),i=0,element;i<assignedNodes.length;i+=1){element=assignedNodes[i];if(babelHelpers.instanceof(element,HTMLElement)&&matchesFn.call(element,selector)){return element}}return null};return new Promise(function(resolve,reject){var element=query(slot,selector);if(element){resolve(element)}else{var observer=new Polymer.FlattenedNodesObserver(slot,function(info){var element=query(slot,selector);if(element){observer.disconnect();resolve(element)}else{reject("no element matched the selector even after the first observed mutation")}})}})}}})();</script><dom-module id="vaadin-demo-shadow-dom-renderer" assetpath="../../vaadin-demo-helpers/"><template><style>:host{display:block;padding:1.5em;}</style></template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var instanceIndex=0,VaadinDemoShadowDomRenderer=/*#__PURE__*/function(_Polymer$Element){babelHelpers.inherits(VaadinDemoShadowDomRenderer,_Polymer$Element);var _super=_createSuper(VaadinDemoShadowDomRenderer);function VaadinDemoShadowDomRenderer(){babelHelpers.classCallCheck(this,VaadinDemoShadowDomRenderer);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinDemoShadowDomRenderer,[{key:"ready",value:function ready(){var _this=this;babelHelpers.get(babelHelpers.getPrototypeOf(VaadinDemoShadowDomRenderer.prototype),"ready",this).call(this);Vaadin.LightDomHelper.querySelectorAsync("slot",this).then(function(slot){return Vaadin.LightDomHelper.querySlotContentAsync("template",slot)}).then(function(template){_this._showDemo(template)}).catch(function(error){throw new Error("vaadin-demo-iframe-renderer requires a <template> child")})}},{key:"_showDemo",value:function _showDemo(template){window.ShadyCSS.prepareTemplate(template,this.id);var dom=this.getRootNode().host._stampTemplate(template);this.shadowRoot.appendChild(dom)}}],[{key:"is",get:function get(){return"vaadin-demo-shadow-dom-renderer"}},{key:"properties",get:function get(){return{id:{type:String,value:function value(){return"vaadin-demo-shadow-dom-".concat(instanceIndex++)}}}}}]);return VaadinDemoShadowDomRenderer}(Polymer.Element);customElements.define(VaadinDemoShadowDomRenderer.is,VaadinDemoShadowDomRenderer)})();</script></dom-module><dom-module id="vaadin-demo-iframe-renderer" assetpath="../../vaadin-demo-helpers/"><template><style>:host{display:flex;flex-direction:column;}.toolbar{flex:none;display:flex;background-color:#f2f3f7;border-bottom:1px solid #ced0dd;padding:0.8rem 1rem .8rem .8rem;}.back, .forward, .url{flex:none;height:30px;box-sizing:border-box;}.back, .forward{line-height:33px;background:#f2f3f7;border:none;width:30px;transition:all ease-in .1s;}.forward{margin-left:5px;}.back:hover,
+this._includeStyle(defaultModuleName,template)}}/** @private */},{key:"_includeStyle",value:function _includeStyle(moduleName,template){if(template&&!template.content.querySelector("style[include=\"".concat(moduleName,"\"]"))){var styleEl=document.createElement("style");styleEl.setAttribute("include",moduleName);template.content.appendChild(styleEl)}}}]);return VaadinThemableMixin}(Vaadin.ThemePropertyMixin(superClass))};</script><script>(function(){"use strict";window.Vaadin=window.Vaadin||{};Vaadin.LightDomHelper={querySelectorAsync:function querySelectorAsync(selector,context){if(!context){context=document}return new Promise(function(resolve,reject){var element=context.querySelector(selector);if(element){resolve(element)}else{var observer=new MutationObserver(function(){var element=context.querySelector(selector);if(element){observer.disconnect();resolve(element)}else{reject("no element matched the selector even after the first observed mutation")}});observer.observe(context,{childList:!0})}})},querySlotContentAsync:function querySlotContentAsync(selector,slot){var matchesFn=HTMLElement.prototype.matches?HTMLElement.prototype.matches:HTMLElement.prototype.msMatchesSelector,query=function query(slot,selector){for(var assignedNodes=slot.assignedNodes(),i=0,element;i<assignedNodes.length;i+=1){element=assignedNodes[i];if(babelHelpers.instanceof(element,HTMLElement)&&matchesFn.call(element,selector)){return element}}return null};return new Promise(function(resolve,reject){var element=query(slot,selector);if(element){resolve(element)}else{var observer=new Polymer.FlattenedNodesObserver(slot,function(info){var element=query(slot,selector);if(element){observer.disconnect();resolve(element)}else{reject("no element matched the selector even after the first observed mutation")}})}})}}})();</script><dom-module id="vaadin-demo-shadow-dom-renderer" assetpath="../../vaadin-demo-helpers/"><template><style>:host{display:block;padding:1.5em;}</style></template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var instanceIndex=0,VaadinDemoShadowDomRenderer=/*#__PURE__*/function(_Polymer$Element){babelHelpers.inherits(VaadinDemoShadowDomRenderer,_Polymer$Element);var _super=_createSuper(VaadinDemoShadowDomRenderer);function VaadinDemoShadowDomRenderer(){babelHelpers.classCallCheck(this,VaadinDemoShadowDomRenderer);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinDemoShadowDomRenderer,[{key:"ready",value:function ready(){var _this=this;babelHelpers.get(babelHelpers.getPrototypeOf(VaadinDemoShadowDomRenderer.prototype),"ready",this).call(this);Vaadin.LightDomHelper.querySelectorAsync("slot",this).then(function(slot){return Vaadin.LightDomHelper.querySlotContentAsync("template",slot)}).then(function(template){_this._showDemo(template)}).catch(function(error){throw new Error("vaadin-demo-iframe-renderer requires a <template> child")})}},{key:"_showDemo",value:function _showDemo(template){window.ShadyCSS.prepareTemplate(template,this.id);var dom=this.getRootNode().host._stampTemplate(template);this.shadowRoot.appendChild(dom)}}],[{key:"is",get:function get(){return"vaadin-demo-shadow-dom-renderer"}},{key:"properties",get:function get(){return{id:{type:String,value:function value(){return"vaadin-demo-shadow-dom-".concat(instanceIndex++)}}}}}]);return VaadinDemoShadowDomRenderer}(Polymer.Element);customElements.define(VaadinDemoShadowDomRenderer.is,VaadinDemoShadowDomRenderer)})();</script></dom-module><dom-module id="vaadin-demo-iframe-renderer" assetpath="../../vaadin-demo-helpers/"><template><style>:host{display:flex;flex-direction:column;}.toolbar{flex:none;display:flex;background-color:#f2f3f7;border-bottom:1px solid #ced0dd;padding:0.8rem 1rem .8rem .8rem;}.back, .forward, .url{flex:none;height:30px;box-sizing:border-box;}.back, .forward{line-height:33px;background:#f2f3f7;border:none;width:30px;transition:all ease-in .1s;}.forward{margin-left:5px;}.back:hover,
       .forward:hover{background:#dfe1ea;border-radius:3px;}.back[disabled], .forward[disabled]{opacity:.5;}.back[disabled]:hover,
       .forward[disabled]:hover{background:none;}.back svg,
-      .forward svg{width:14px;height:auto;}.url{flex-grow:1;border-radius:3px;outline:none;box-shadow:none;border:1px solid #ced0dd;padding:5px 10px;line-height:30px;font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";font-size:14px;margin-left:10px;transition:all ease-in .1s;}.url:focus{border:1px solid #9ec5ef;box-shadow:0 2px 8px 0 rgba(0,0,0,.08);}#demo{flex:auto;display:block;width:100%;border:0;}</style><div class="toolbar"><button class="back" disabled="[[!hasBack]]" on-click="_onBackClicked"><svg xmlns="http://www.w3.org/2000/svg" width="48" height="48" viewBox="0 0 48 48"><title>icon-arrow-left</title><polyline points="20.6 8 5.62 24.1 20.6 40.2" fill="none" stroke="#686f75" stroke-linecap="round" stroke-miterlimit="10" stroke-width="6"></polyline><line x1="7.53" y1="24.1" x2="42.33" y2="24.1" fill="none" stroke="#686f75" stroke-linecap="round" stroke-miterlimit="10" stroke-width="6"></line></svg></button> <button class="forward" disabled="[[!hasForward]]" on-click="_onForwardClicked"><svg xmlns="http://www.w3.org/2000/svg" width="48" height="48" viewBox="0 0 48 48"><title>icon-arrow-right</title><polyline points="27.35 40.2 42.33 24.1 27.35 8" fill="none" stroke="#686f75" stroke-linecap="round" stroke-miterlimit="10" stroke-width="6"></polyline><line x1="40.42" y1="24.1" x2="5.62" y2="24.1" fill="none" stroke="#686f75" stroke-linecap="round" stroke-miterlimit="10" stroke-width="6"></line></svg></button> <input class="url" value="[[url]]" on-change="_onUrlEdited"></div><iframe id="demo" name="[[id]]" src="[[src]]" data-demo-components-root$="[[demoComponentsRoot]]"></iframe></template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var instanceIndex=0,VaadinDemoIframeRenderer=/*#__PURE__*/function(_Polymer$Element){babelHelpers.inherits(VaadinDemoIframeRenderer,_Polymer$Element);var _super=_createSuper(VaadinDemoIframeRenderer);babelHelpers.createClass(VaadinDemoIframeRenderer,null,[{key:"is",get:function get(){return"vaadin-demo-iframe-renderer"}},{key:"properties",get:function get(){return{id:{type:String,value:function value(){return"vaadin-demo-iframe-".concat(instanceIndex++)}},demoComponentsRoot:{type:String},src:{type:String,value:"about:blank"},url:{type:String,value:"/"},hasBack:Boolean,hasForward:Boolean}}}]);function VaadinDemoIframeRenderer(){var _this;babelHelpers.classCallCheck(this,VaadinDemoIframeRenderer);_this=_super.call(this);_this.__windowMessageListener=_this._onWindowMessage.bind(babelHelpers.assertThisInitialized(_this));_this.__iframeReady=new Promise(function(resolve,reject){_this.__resolveIframeReady=resolve;_this.__rejectIframeReady=reject});return _this}babelHelpers.createClass(VaadinDemoIframeRenderer,[{key:"connectedCallback",value:function connectedCallback(){babelHelpers.get(babelHelpers.getPrototypeOf(VaadinDemoIframeRenderer.prototype),"connectedCallback",this).call(this);window.addEventListener("message",this.__windowMessageListener)}},{key:"disconnectedCallback",value:function disconnectedCallback(){window.removeEventListener("message",this.__windowMessageListener);babelHelpers.get(babelHelpers.getPrototypeOf(VaadinDemoIframeRenderer.prototype),"disconnectedCallback",this).call(this)}},{key:"ready",value:function ready(){var _this2=this;babelHelpers.get(babelHelpers.getPrototypeOf(VaadinDemoIframeRenderer.prototype),"ready",this).call(this);Vaadin.LightDomHelper.querySelectorAsync("slot",this).then(function(slot){return Vaadin.LightDomHelper.querySlotContentAsync("template",slot)}).then(function(template){_this2._showDemo(template)}).catch(function(error){throw new Error("vaadin-demo-iframe-renderer requires a <template> child")})}},{key:"_postIframeMessage",value:function _postIframeMessage(message){this.__iframeReady.then(function(iframe){iframe.contentWindow.postMessage(message,window.location.origin)}).catch(function(error){console.log("demo iframe failed to load: ".concat(error))})}},{key:"_onWindowMessage",value:function _onWindowMessage(event){if(event.origin===window.location.origin&&"iframe-popstate"===event.data.type&&event.data.id===this.id){this.__resolveIframeReady(this.$.demo);var detail=event.data.detail;this.url=detail.pathname;this.hasBack=detail.hasBack;this.hasForward=detail.hasForward}}},{key:"_onBackClicked",value:function _onBackClicked(){this._postIframeMessage({type:"go-back"})}},{key:"_onForwardClicked",value:function _onForwardClicked(){this._postIframeMessage({type:"go-forward"})}},{key:"_onUrlEdited",value:function _onUrlEdited(event){var url=(event.target.value||"").trim();if(""===url){url="/"}event.target.value=url;this._postIframeMessage({type:"set-url",url:url})}},{key:"_showDemo",value:function _showDemo(template){this._postIframeMessage({type:"set-template",html:template.innerHTML})}}]);return VaadinDemoIframeRenderer}(Polymer.Element);customElements.define(VaadinDemoIframeRenderer.is,VaadinDemoIframeRenderer)})();</script></dom-module><dom-module id="vaadin-demo-snippet-default-theme" assetpath="../../vaadin-demo-helpers/"><template><style>code[class*="lang-"],
+      .forward svg{width:14px;height:auto;}.url{flex-grow:1;border-radius:3px;outline:none;box-shadow:none;border:1px solid #ced0dd;padding:5px 10px;line-height:30px;font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";font-size:14px;margin-left:10px;transition:all ease-in .1s;}.url:focus{border:1px solid #9ec5ef;box-shadow:0 2px 8px 0 rgba(0,0,0,.08);}#demo{flex:auto;display:block;width:100%;border:0;}</style><div class="toolbar"><button class="back" disabled="[[!hasBack]]" on-click="_onBackClicked"><svg xmlns="http://www.w3.org/2000/svg" width="48" height="48" viewBox="0 0 48 48"><title>icon-arrow-left</title><polyline points="20.6 8 5.62 24.1 20.6 40.2" fill="none" stroke="#686f75" stroke-linecap="round" stroke-miterlimit="10" stroke-width="6"></polyline><line x1="7.53" y1="24.1" x2="42.33" y2="24.1" fill="none" stroke="#686f75" stroke-linecap="round" stroke-miterlimit="10" stroke-width="6"></line></svg></button> <button class="forward" disabled="[[!hasForward]]" on-click="_onForwardClicked"><svg xmlns="http://www.w3.org/2000/svg" width="48" height="48" viewBox="0 0 48 48"><title>icon-arrow-right</title><polyline points="27.35 40.2 42.33 24.1 27.35 8" fill="none" stroke="#686f75" stroke-linecap="round" stroke-miterlimit="10" stroke-width="6"></polyline><line x1="40.42" y1="24.1" x2="5.62" y2="24.1" fill="none" stroke="#686f75" stroke-linecap="round" stroke-miterlimit="10" stroke-width="6"></line></svg></button> <input class="url" value="[[url]]" on-change="_onUrlEdited"></div><iframe id="demo" name="[[id]]" src="[[src]]" data-demo-components-root$="[[demoComponentsRoot]]"></iframe></template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var instanceIndex=0,VaadinDemoIframeRenderer=/*#__PURE__*/function(_Polymer$Element){babelHelpers.inherits(VaadinDemoIframeRenderer,_Polymer$Element);var _super=_createSuper(VaadinDemoIframeRenderer);function VaadinDemoIframeRenderer(){var _this;babelHelpers.classCallCheck(this,VaadinDemoIframeRenderer);_this=_super.call(this);_this.__windowMessageListener=_this._onWindowMessage.bind(babelHelpers.assertThisInitialized(_this));_this.__iframeReady=new Promise(function(resolve,reject){_this.__resolveIframeReady=resolve;_this.__rejectIframeReady=reject});return _this}babelHelpers.createClass(VaadinDemoIframeRenderer,[{key:"connectedCallback",value:function connectedCallback(){babelHelpers.get(babelHelpers.getPrototypeOf(VaadinDemoIframeRenderer.prototype),"connectedCallback",this).call(this);window.addEventListener("message",this.__windowMessageListener)}},{key:"disconnectedCallback",value:function disconnectedCallback(){window.removeEventListener("message",this.__windowMessageListener);babelHelpers.get(babelHelpers.getPrototypeOf(VaadinDemoIframeRenderer.prototype),"disconnectedCallback",this).call(this)}},{key:"ready",value:function ready(){var _this2=this;babelHelpers.get(babelHelpers.getPrototypeOf(VaadinDemoIframeRenderer.prototype),"ready",this).call(this);Vaadin.LightDomHelper.querySelectorAsync("slot",this).then(function(slot){return Vaadin.LightDomHelper.querySlotContentAsync("template",slot)}).then(function(template){_this2._showDemo(template)}).catch(function(error){throw new Error("vaadin-demo-iframe-renderer requires a <template> child")})}},{key:"_postIframeMessage",value:function _postIframeMessage(message){this.__iframeReady.then(function(iframe){iframe.contentWindow.postMessage(message,window.location.origin)}).catch(function(error){console.log("demo iframe failed to load: ".concat(error))})}},{key:"_onWindowMessage",value:function _onWindowMessage(event){if(event.origin===window.location.origin&&"iframe-popstate"===event.data.type&&event.data.id===this.id){this.__resolveIframeReady(this.$.demo);var detail=event.data.detail;this.url=detail.pathname;this.hasBack=detail.hasBack;this.hasForward=detail.hasForward}}},{key:"_onBackClicked",value:function _onBackClicked(){this._postIframeMessage({type:"go-back"})}},{key:"_onForwardClicked",value:function _onForwardClicked(){this._postIframeMessage({type:"go-forward"})}},{key:"_onUrlEdited",value:function _onUrlEdited(event){var url=(event.target.value||"").trim();if(""===url){url="/"}event.target.value=url;this._postIframeMessage({type:"set-url",url:url})}},{key:"_showDemo",value:function _showDemo(template){this._postIframeMessage({type:"set-template",html:template.innerHTML})}}],[{key:"is",get:function get(){return"vaadin-demo-iframe-renderer"}},{key:"properties",get:function get(){return{id:{type:String,value:function value(){return"vaadin-demo-iframe-".concat(instanceIndex++)}},demoComponentsRoot:{type:String},src:{type:String,value:"about:blank"},url:{type:String,value:"/"},hasBack:Boolean,hasForward:Boolean}}}]);return VaadinDemoIframeRenderer}(Polymer.Element);customElements.define(VaadinDemoIframeRenderer.is,VaadinDemoIframeRenderer)})();</script></dom-module><dom-module id="vaadin-demo-snippet-default-theme" assetpath="../../vaadin-demo-helpers/"><template><style>code[class*="lang-"],
     pre[class*="lang-"]{color:#393A34;font-family:"Source Code Pro", "Consolas", "Bitstream Vera Sans Mono", "Courier New", Courier, monospace;direction:ltr;text-align:left;white-space:pre;word-spacing:normal;word-break:normal;font-size:0.875em;line-height:1.4;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-hyphens:none;-moz-hyphens:none;-ms-hyphens:none;hyphens:none;}pre[class*="lang-"]::-moz-selection, pre[class*="lang-"] ::-moz-selection,
     code[class*="lang-"]::-moz-selection, code[class*="lang-"] ::-moz-selection{background:#b3d4fc;}pre[class*="lang-"]::selection, pre[class*="lang-"] ::selection,
     code[class*="lang-"]::selection, code[class*="lang-"] ::selection{background:#b3d4fc;}pre[class*="lang-"]{padding:1em;margin:.5em 0;overflow:auto;border:1px solid #dddddd;background-color:white;}:not(pre) > code[class*="lang-"],
@@ -6708,7 +6680,7 @@
     .lang-autohotkey .token.keyword{color:#00009f;}.token.important,
     .token.function,
     .token.bold{font-weight:bold;}.token.italic{font-style:italic;}</style></template></dom-module><dom-module id="vaadin-demo-snippet" assetpath="../../vaadin-demo-helpers/"><template><style>:host{display:block;background-color:white;box-shadow:0 0 0 1px rgba(0, 0, 0, 0.1);margin-bottom:3em;@apply --demo-snippet;}#demo{display:block;border-bottom:1px solid rgba(0, 0, 0, 0.1);margin:0;@apply --demo-snippet-demo;}.code-container{margin:0;background-color:rgba(0, 0, 0, 0.02);font-size:0.95em;overflow:auto;position:relative;padding:0;@apply --demo-snippet-code;}.code-container .code{padding:1.4em 2em;margin:0;overflow:auto;max-height:18.5em;@apply --demo-snippet-code;}.code-container .code > pre{margin:0;}.code-container button{position:absolute;top:0.5em;right:0.5em;text-transform:uppercase;border:none;border-radius:0.25em;cursor:pointer;background:rgba(0, 0, 0, 0.3);color:#fff;}.code-container button:focus,
-      .code-container button:hover{background:rgba(0, 0, 0, 0.6);}</style><prism-highlighter></prism-highlighter><div id="demo"><template is="dom-if" if="[[_isIframe]]" restamp=""><vaadin-demo-iframe-renderer src="[[iframeSrc]]" id="[[id]]" demo-components-root="[[demoComponentsRoot]]"><slot></slot></vaadin-demo-iframe-renderer></template><template is="dom-if" if="[[!_isIframe]]" restamp=""><vaadin-demo-shadow-dom-renderer id="[[id]]"><slot></slot></vaadin-demo-shadow-dom-renderer></template></div><div class="code-container"><marked-element markdown="[[_markdown]]" id="marked"><div class="code" slot="markdown-html"></div></marked-element><button id="copyButton" title="copy to clipboard" on-tap="_copyToClipboard">Copy</button></div></template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var instanceIndex=0,VaadinDemoSnippet=/*#__PURE__*/function(_Vaadin$ThemableMixin){babelHelpers.inherits(VaadinDemoSnippet,_Vaadin$ThemableMixin);var _super=_createSuper(VaadinDemoSnippet);function VaadinDemoSnippet(){babelHelpers.classCallCheck(this,VaadinDemoSnippet);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinDemoSnippet,[{key:"ready",value:function ready(){var _this=this;babelHelpers.get(babelHelpers.getPrototypeOf(VaadinDemoSnippet.prototype),"ready",this).call(this);Vaadin.LightDomHelper.querySelectorAsync("template",this).then(function(template){try{var host=_this.getRootNode().host.getRootNode().host;// set the root directory for lazy loaded elements in demos
+      .code-container button:hover{background:rgba(0, 0, 0, 0.6);}</style><prism-highlighter></prism-highlighter><div id="demo"><template is="dom-if" if="[[_isIframe]]" restamp=""><vaadin-demo-iframe-renderer src="[[iframeSrc]]" id="[[id]]" demo-components-root="[[demoComponentsRoot]]"><slot></slot></vaadin-demo-iframe-renderer></template><template is="dom-if" if="[[!_isIframe]]" restamp=""><vaadin-demo-shadow-dom-renderer id="[[id]]"><slot></slot></vaadin-demo-shadow-dom-renderer></template></div><div class="code-container"><marked-element markdown="[[_markdown]]" id="marked"><div class="code" slot="markdown-html"></div></marked-element><button id="copyButton" title="copy to clipboard" on-tap="_copyToClipboard">Copy</button></div></template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var instanceIndex=0,VaadinDemoSnippet=/*#__PURE__*/function(_Vaadin$ThemableMixin){babelHelpers.inherits(VaadinDemoSnippet,_Vaadin$ThemableMixin);var _super=_createSuper(VaadinDemoSnippet);function VaadinDemoSnippet(){babelHelpers.classCallCheck(this,VaadinDemoSnippet);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinDemoSnippet,[{key:"ready",value:function ready(){var _this=this;babelHelpers.get(babelHelpers.getPrototypeOf(VaadinDemoSnippet.prototype),"ready",this).call(this);Vaadin.LightDomHelper.querySelectorAsync("template",this).then(function(template){try{var host=_this.getRootNode().host.getRootNode().host;// set the root directory for lazy loaded elements in demos
 _this.demoComponentsRoot="".concat(host.srcBaseHref,"/demo-elements")}catch(e){console.error("Unable to get the `baseHref` from the <vaadin-component-demo>")}_this._showDemo(template)}).catch(function(error){throw new Error("vaadin-demo-snippet requires a <template> child")})}},{key:"_computeIsIframe",value:function _computeIsIframe(iframeSrc){return"string"===typeof iframeSrc&&""!==iframeSrc.trim()}},{key:"_showDemo",value:function _showDemo(template){// Hide the use of window.addDemoReadyListener
 var snippet=this.$.marked.unindent(template.innerHTML).replace(/window\.addDemoReadyListener\('[^{]+/g,"window.addEventListener('WebComponentsReady', function() ");// Hide the use of window.Vaadin.demoComponentsRoot
 snippet=snippet.replace(/`(\${Vaadin\.Demo\.componentsRoot})(.+)`/gi,"'$2'");// Hide the use of window.__importModule for dynamic imports
@@ -6717,7 +6689,7 @@
 snippet=snippet.replace(/=""/g,"");this._markdown="```html\n"+snippet.trim()+"```"}},{key:"_copyToClipboard",value:function _copyToClipboard(){// From https://github.com/google/material-design-lite/blob/master/docs/_assets/snippets.js
 var snipRange=document.createRange(),selectedSource=this.shadowRoot.querySelector("marked-element > .code");snipRange.selectNodeContents(selectedSource);var selection=window.getSelection();selection.removeAllRanges();selection.addRange(snipRange);var result=!1;try{result=document.execCommand("copy");this.$.copyButton.textContent="done"}catch(err){// Copy command is not available
 console.error(err);this.$.copyButton.textContent="error"}// Return to the copy button after a second.
-setTimeout(this._resetCopyButtonState.bind(this),1e3);selection.removeAllRanges();return result}},{key:"_resetCopyButtonState",value:function _resetCopyButtonState(){this.$.copyButton.textContent="copy"}}],[{key:"is",get:function get(){return"vaadin-demo-snippet"}},{key:"properties",get:function get(){return{id:{type:String,value:function value(){return"vaadin-demo-snippet-".concat(instanceIndex++)}},iframeSrc:String,demoComponentsRoot:String,_isIframe:{type:Boolean,value:!1,computed:"_computeIsIframe(iframeSrc)"},_markdown:String}}}]);return VaadinDemoSnippet}(Vaadin.ThemableMixin(Polymer.GestureEventListeners(Polymer.Element)));customElements.define(VaadinDemoSnippet.is,VaadinDemoSnippet)})();</script></dom-module><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}(function(){'use strict';var VaadinDemoIframeRendererOutlet=/*#__PURE__*/function(_HTMLElement){babelHelpers.inherits(VaadinDemoIframeRendererOutlet,_HTMLElement);var _super=_createSuper(VaadinDemoIframeRendererOutlet);function VaadinDemoIframeRendererOutlet(){var _this;babelHelpers.classCallCheck(this,VaadinDemoIframeRendererOutlet);_this=_super.call(this);_this.__windowMessageListener=_this._onWindowMessage.bind(babelHelpers.assertThisInitialized(_this));_this.__windowPopstateListener=_this._onWindowPopstate.bind(babelHelpers.assertThisInitialized(_this));_this.__webComponentsReady=new Promise(function(resolve,reject){if(window.WebComponents.ready){resolve()}else{var onWebComponentsReady=function onWebComponentsReady(){document.removeEventListener("WebComponentsReady",onWebComponentsReady);resolve()};document.addEventListener("WebComponentsReady",onWebComponentsReady)}});return _this}babelHelpers.createClass(VaadinDemoIframeRendererOutlet,[{key:"connectedCallback",value:function connectedCallback(){this.history=[window.location.pathname];this.historyIdx=0;this.historyIdxUpdated=!1;window.addEventListener("message",this.__windowMessageListener);window.addEventListener("popstate",this.__windowPopstateListener);// notify the parent that the iframe renderer is ready
+setTimeout(this._resetCopyButtonState.bind(this),1e3);selection.removeAllRanges();return result}},{key:"_resetCopyButtonState",value:function _resetCopyButtonState(){this.$.copyButton.textContent="copy"}}],[{key:"is",get:function get(){return"vaadin-demo-snippet"}},{key:"properties",get:function get(){return{id:{type:String,value:function value(){return"vaadin-demo-snippet-".concat(instanceIndex++)}},iframeSrc:String,demoComponentsRoot:String,_isIframe:{type:Boolean,value:!1,computed:"_computeIsIframe(iframeSrc)"},_markdown:String}}}]);return VaadinDemoSnippet}(Vaadin.ThemableMixin(Polymer.GestureEventListeners(Polymer.Element)));customElements.define(VaadinDemoSnippet.is,VaadinDemoSnippet)})();</script></dom-module><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){"use strict";var VaadinDemoIframeRendererOutlet=/*#__PURE__*/function(_HTMLElement){babelHelpers.inherits(VaadinDemoIframeRendererOutlet,_HTMLElement);var _super=_createSuper(VaadinDemoIframeRendererOutlet);function VaadinDemoIframeRendererOutlet(){var _this;babelHelpers.classCallCheck(this,VaadinDemoIframeRendererOutlet);_this=_super.call(this);_this.__windowMessageListener=_this._onWindowMessage.bind(babelHelpers.assertThisInitialized(_this));_this.__windowPopstateListener=_this._onWindowPopstate.bind(babelHelpers.assertThisInitialized(_this));_this.__webComponentsReady=new Promise(function(resolve,reject){if(window.WebComponents.ready){resolve()}else{var onWebComponentsReady=function onWebComponentsReady(){document.removeEventListener("WebComponentsReady",onWebComponentsReady);resolve()};document.addEventListener("WebComponentsReady",onWebComponentsReady)}});return _this}babelHelpers.createClass(VaadinDemoIframeRendererOutlet,[{key:"connectedCallback",value:function connectedCallback(){this.history=[window.location.pathname];this.historyIdx=0;this.historyIdxUpdated=!1;window.addEventListener("message",this.__windowMessageListener);window.addEventListener("popstate",this.__windowPopstateListener);// notify the parent that the iframe renderer is ready
 this._postPopstateMessage()}},{key:"disconnectedCallback",value:function disconnectedCallback(){window.removeEventListener("message",this.__windowMessageListener);window.removeEventListener("popstate",this.__windowPopstateListener)}},{key:"_postMessage",value:function _postMessage(type,detail){window.parent.postMessage({type:type,id:window.frameElement.name,detail:detail},window.location.origin)}},{key:"_postPopstateMessage",value:function _postPopstateMessage(){this._postMessage("iframe-popstate",{pathname:window.location.pathname,hasBack:0<this.historyIdx,hasForward:this.historyIdx<this.history.length-1})}},{key:"_onWindowMessage",value:function _onWindowMessage(event){var _this2=this;if(event.origin===window.location.origin){switch(event.data.type){case"set-template":this.__webComponentsReady.then(function(){_this2._setDemoComponentsRoot();_this2.setInnerHtmlWithScripts(event.data.html);_this2.history=["/"];_this2._activateHistoryEntry(0)});break;case"set-url":this.history[this.historyIdx+1]=event.data.url;this.history.length=this.historyIdx+2;// truncate the array
 this._activateHistoryEntry(this.historyIdx+1);break;case"go-back":// do not use window.history.back() here because that could affect other iframes
 if(0<this.historyIdx){this._activateHistoryEntry(this.historyIdx-1)}break;case"go-forward":// do not use window.history.forward() here because that could affect other iframes
@@ -6725,7 +6697,7 @@
 // console.log(`unknown message type: ${event.data.type}`);
 }}}},{key:"_activateHistoryEntry",value:function _activateHistoryEntry(historyIdx){this.historyIdx=historyIdx;this.historyIdxUpdated=!0;window.history.pushState(null,document.title,this.history[historyIdx]);window.dispatchEvent(new PopStateEvent("popstate"))}},{key:"_onWindowPopstate",value:function _onWindowPopstate(event){if(this.historyIdxUpdated){this.historyIdxUpdated=!1}else{this.historyIdx+=1;this.history[this.historyIdx]=window.location.pathname;this.history.length=this.historyIdx+1;// truncate the array
 }this._postPopstateMessage()}},{key:"_setDemoComponentsRoot",value:function _setDemoComponentsRoot(){// store the reference for lazy loading
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+      pre{background-color:var(--lumo-contrast-10pct);border-radius:var(--lumo-border-radius-m);}</style></template></dom-module><dom-module id="lumo-color-legacy" assetpath="../../vaadin-lumo-styles/"><template><style include="lumo-color">:host{color:var(--lumo-body-text-color) !important;background-color:var(--lumo-base-color) !important;}</style></template></dom-module><dom-module id="vaadin-router-demo-shared-styles"><template><style>.note{background-color:#24c0ea;padding:1em;color:white;border-radius:4px;}</style></template></dom-module><dom-module id="vaadin-router-demo-nested-styles"><template><style>:host{display:flex;flex-direction:column;background:#ddd;padding:5px;min-height:100vh;}main{margin-top:10px;padding:5px;background:#fff;flex:1 0 auto;min-height:80px;}</style></template></dom-module><dom-module id="vaadin-demo-snippet-no-renderer-theme" theme-for="vaadin-demo-snippet"><template><style include="vaadin-demo-snippet-default-theme">:host([theme~="no-renderer"]) #demo{display:none;}</style></template></dom-module><script>(function(global,factory){"object"===("undefined"===typeof exports?"undefined":babelHelpers.typeof(exports))&&"undefined"!==typeof module?factory(exports):"function"===typeof define&&define.amd?define(["exports"],factory):(global="undefined"!==typeof globalThis?globalThis:global||self,factory(global.Vaadin=global.Vaadin||{}))})(this,function(exports){"use strict";function _typeof(obj){"@babel/helpers - 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super() hasn't been called")}return self}function _possibleConstructorReturn(self,call){if(call&&("object"===babelHelpers.typeof(call)||"function"===typeof call)){return call}else if(void 0!==call){throw new TypeError("Derived constructors may only return object or undefined")}return _assertThisInitialized(self)}function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=_getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=_getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return _possibleConstructorReturn(this,result)}}function _superPropBase(object,property){while(!Object.prototype.hasOwnProperty.call(object,property)){object=_getPrototypeOf(object);if(null===object)break}return object}function _get(){if("undefined"!==typeof Reflect&&Reflect.get){_get=Reflect.get.bind()}else{_get=function _get(target,property,receiver){var base=_superPropBase(target,property);if(!base)return;var desc=Object.getOwnPropertyDescriptor(base,property);if(desc.get){return desc.get.call(3>arguments.length?target:receiver)}return desc.value}}return _get.apply(this,arguments)}function _toConsumableArray(arr){return _arrayWithoutHoles(arr)||_iterableToArray(arr)||_unsupportedIterableToArray(arr)||_nonIterableSpread()}function _arrayWithoutHoles(arr){if(Array.isArray(arr))return _arrayLikeToArray(arr)}function _iterableToArray(iter){if("undefined"!==typeof Symbol&&null!=iter[Symbol.iterator]||null!=iter["@@iterator"])return Array.from(iter)}function _unsupportedIterableToArray(o,minLen){if(!o)return;if("string"===typeof o)return _arrayLikeToArray(o,minLen);var n=Object.prototype.toString.call(o).slice(8,-1);if("Object"===n&&o.constructor)n=o.constructor.name;if("Map"===n||"Set"===n)return Array.from(o);if("Arguments"===n||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n))return _arrayLikeToArray(o,minLen)}function _arrayLikeToArray(arr,len){if(null==len||len>arr.length)len=arr.length;for(var i=0,arr2=Array(len);i<len;i++)arr2[i]=arr[i];return arr2}function _nonIterableSpread(){throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}function _toPrimitive(input,hint){if("object"!==babelHelpers.typeof(input)||null===input)return input;var prim=input[Symbol.toPrimitive];if(prim!==void 0){var res=prim.call(input,hint||"default");if("object"!==babelHelpers.typeof(res))return res;throw new TypeError("@@toPrimitive must return a primitive value.")}return("string"===hint?String:Number)(input)}function _toPropertyKey(arg){var key=_toPrimitive(arg,"string");return"symbol"===babelHelpers.typeof(key)?key:key+""}function toArray(objectOrArray){objectOrArray=objectOrArray||[];return Array.isArray(objectOrArray)?objectOrArray:[objectOrArray]}function log(msg){return"[Vaadin.Router] ".concat(msg)}function logValue(value){if("object"!==_typeof(value)){return value+""}var stringType=Object.prototype.toString.call(value).match(/ (.*)\]$/)[1];if("Object"===stringType||"Array"===stringType){return"".concat(stringType," ").concat(JSON.stringify(value))}else{return stringType}}var MODULE="module",NOMODULE="nomodule",bundleKeys=[MODULE,NOMODULE];function ensureBundle(src){if(!src.match(/.+\.[m]?js$/)){throw new Error(log("Unsupported type for bundle \"".concat(src,"\": .js or .mjs expected.")))}}function ensureRoute(route){if(!route||!isString(route.path)){throw new Error(log("Expected route config to be an object with a \"path\" string property, or an array of such objects"))}var bundle=route.bundle,stringKeys=["component","redirect","bundle"];if(!isFunction(route.action)&&!Array.isArray(route.children)&&!isFunction(route.children)&&!isObject(bundle)&&!stringKeys.some(function(key){return isString(route[key])})){throw new Error(log("Expected route config \"".concat(route.path,"\" to include either \"").concat(stringKeys.join("\", \""),"\" ")+"or \"action\" function but none found."))}if(bundle){if(isString(bundle)){ensureBundle(bundle)}else if(!bundleKeys.some(function(key){return key in bundle})){throw new Error(log("Expected route bundle to include either \""+NOMODULE+"\" or \""+MODULE+"\" keys, or both"))}else{bundleKeys.forEach(function(key){return key in bundle&&ensureBundle(bundle[key])})}}if(route.redirect){["bundle","component"].forEach(function(overriddenProp){if(overriddenProp in route){console.warn(log("Route config \"".concat(route.path,"\" has both \"redirect\" and \"").concat(overriddenProp,"\" properties, ")+"and \"redirect\" will always override the latter. Did you mean to only use \"".concat(overriddenProp,"\"?")))}})}}function ensureRoutes(routes){toArray(routes).forEach(function(route){return ensureRoute(route)})}function loadScript(src,key){var script=document.head.querySelector("script[src=\""+src+"\"][async]");if(!script){script=document.createElement("script");script.setAttribute("src",src);if(key===MODULE){script.setAttribute("type",MODULE)}else if(key===NOMODULE){script.setAttribute(NOMODULE,"")}script.async=!0}return new Promise(function(resolve,reject){script.onreadystatechange=script.onload=function(e){script.__dynamicImportLoaded=!0;resolve(e)};script.onerror=function(e){if(script.parentNode){script.parentNode.removeChild(script)}reject(e)};if(null===script.parentNode){document.head.appendChild(script)}else if(script.__dynamicImportLoaded){resolve()}})}function loadBundle(bundle){if(isString(bundle)){return loadScript(bundle)}else{return Promise.race(bundleKeys.filter(function(key){return key in bundle}).map(function(key){return loadScript(bundle[key],key)}))}}function fireRouterEvent(type,detail){return!window.dispatchEvent(new CustomEvent("vaadin-router-".concat(type),{cancelable:"go"===type,detail:detail}))}function isObject(o){// guard against null passing the typeof check
+return"object"===_typeof(o)&&!!o}function isFunction(f){return"function"===typeof f}function isString(s){return"string"===typeof s}function getNotFoundError(context){var error=new Error(log("Page not found (".concat(context.pathname,")")));error.context=context;error.code=404;return error}var notFoundResult=new(/*#__PURE__*/_createClass(function NotFoundResult(){_classCallCheck(this,NotFoundResult)}));/* istanbul ignore next: coverage is calculated in Chrome, this code is for IE */function getAnchorOrigin(anchor){// IE11: on HTTP and HTTPS the default port is not included into
 // window.location.origin, so won't include it here either.
 var port=anchor.port,protocol=anchor.protocol,defaultHttp="http:"===protocol&&"80"===port,defaultHttps="https:"===protocol&&"443"===port,host=defaultHttp||defaultHttps?anchor.hostname// does not include the port number (e.g. www.example.org)
 :anchor.host;// does include the port number (e.g. www.example.org:80)
@@ -6773,13 +6745,14 @@
    *
    * @memberOf Router.NavigationTrigger
    * @type {NavigationTrigger}
-   */var CLICK={activate:function activate(){window.document.addEventListener("click",vaadinRouterGlobalClickHandler)},inactivate:function inactivate(){window.document.removeEventListener("click",vaadinRouterGlobalClickHandler)}},isIE=/Trident/.test(navigator.userAgent);/* istanbul ignore next: coverage is calculated in Chrome, this code is for IE */if(isIE&&!isFunction(window.PopStateEvent)){window.PopStateEvent=function(inType,params){params=params||{};var e=document.createEvent("Event");e.initEvent(inType,!!params.bubbles,!!params.cancelable);e.state=params.state||null;return e};window.PopStateEvent.prototype=window.Event.prototype}function vaadinRouterGlobalPopstateHandler(event){if("vaadin-router-ignore"===event.state){return}var _window$location=window.location,pathname=_window$location.pathname,search=_window$location.search,hash=_window$location.hash;fireRouterEvent("go",{pathname:pathname,search:search,hash:hash})}/**
+   */var CLICK={activate:function activate(){window.document.addEventListener("click",vaadinRouterGlobalClickHandler)},inactivate:function inactivate(){window.document.removeEventListener("click",vaadinRouterGlobalClickHandler)}},isIE=/Trident/.test(navigator.userAgent);// PopStateEvent constructor shim
+/* istanbul ignore next: coverage is calculated in Chrome, this code is for IE */if(isIE&&!isFunction(window.PopStateEvent)){window.PopStateEvent=function(inType,params){params=params||{};var e=document.createEvent("Event");e.initEvent(inType,!!params.bubbles,!!params.cancelable);e.state=params.state||null;return e};window.PopStateEvent.prototype=window.Event.prototype}function vaadinRouterGlobalPopstateHandler(event){if("vaadin-router-ignore"===event.state){return}var _window$location=window.location,pathname=_window$location.pathname,search=_window$location.search,hash=_window$location.hash;fireRouterEvent("go",{pathname:pathname,search:search,hash:hash})}/**
    * A navigation trigger for Vaadin Router that translates popstate events into
    * Vaadin Router navigation events.
    *
    * @memberOf Router.NavigationTrigger
    * @type {NavigationTrigger}
-   */var POPSTATE={activate:function activate(){window.addEventListener("popstate",vaadinRouterGlobalPopstateHandler)},inactivate:function inactivate(){window.removeEventListener("popstate",vaadinRouterGlobalPopstateHandler)}},pathToRegexp_1=pathToRegexp,parse_1=parse,compile_1=compile,tokensToFunction_1=tokensToFunction,tokensToRegExp_1=tokensToRegExp,DEFAULT_DELIMITER="/",DEFAULT_DELIMITERS="./",PATH_REGEXP=new RegExp([// Match escaped characters that would otherwise appear in future matches.
+   */var POPSTATE={activate:function activate(){window.addEventListener("popstate",vaadinRouterGlobalPopstateHandler)},inactivate:function inactivate(){window.removeEventListener("popstate",vaadinRouterGlobalPopstateHandler)}},pathToRegexp_1=pathToRegexp$1,parse_1=parse,compile_1=compile,tokensToFunction_1=tokensToFunction,tokensToRegExp_1=tokensToRegExp,DEFAULT_DELIMITER="/",DEFAULT_DELIMITERS="./",PATH_REGEXP=new RegExp([// Match escaped characters that would otherwise appear in future matches.
 // This allows the user to escape special characters that won't transform.
 "(\\\\.)",// Match Express-style parameters and un-named parameters with a prefix
 // and optional suffixes. Matches appear as:
@@ -6837,7 +6810,7 @@
    * @param  {Array=}  keys
    * @param  {Object=} options
    * @return {!RegExp}
-   */function arrayToRegexp(path,keys,options){for(var parts=[],i=0;i<path.length;i++){parts.push(pathToRegexp(path[i],keys,options).source)}return new RegExp("(?:"+parts.join("|")+")",flags(options))}/**
+   */function arrayToRegexp(path,keys,options){for(var parts=[],i=0;i<path.length;i++){parts.push(pathToRegexp$1(path[i],keys,options).source)}return new RegExp("(?:"+parts.join("|")+")",flags(options))}/**
    * Create a path regexp from string input.
    *
    * @param  {string}  path
@@ -6863,15 +6836,15 @@
    * @param  {Array=}                keys
    * @param  {Object=}               options
    * @return {!RegExp}
-   */function pathToRegexp(path,keys,options){if(babelHelpers.instanceof(path,RegExp)){return regexpToRegexp(path,keys)}if(Array.isArray(path)){return arrayToRegexp(/** @type {!Array} */path,keys,options)}return stringToRegexp(/** @type {string} */path,keys,options)}pathToRegexp_1.parse=parse_1;pathToRegexp_1.compile=compile_1;pathToRegexp_1.tokensToFunction=tokensToFunction_1;pathToRegexp_1.tokensToRegExp=tokensToRegExp_1;/**
+   */function pathToRegexp$1(path,keys,options){if(babelHelpers.instanceof(path,RegExp)){return regexpToRegexp(path,keys)}if(Array.isArray(path)){return arrayToRegexp(/** @type {!Array} */path,keys,options)}return stringToRegexp(/** @type {string} */path,keys,options)}pathToRegexp_1.parse=parse_1;pathToRegexp_1.compile=compile_1;pathToRegexp_1.tokensToFunction=tokensToFunction_1;pathToRegexp_1.tokensToRegExp=tokensToRegExp_1;/**
    * Universal Router (https://www.kriasoft.com/universal-router/)
    *
    * Copyright (c) 2015-present Kriasoft.
    *
    * This source code is licensed under the MIT license found in the
    * LICENSE.txt file in the root directory of this source tree.
-   */var hasOwnProperty=Object.prototype.hasOwnProperty,cache=new Map;// see https://github.com/pillarjs/path-to-regexp/issues/148
-cache.set("|false",{keys:[],pattern:/(?:)/});function decodeParam(val){try{return decodeURIComponent(val)}catch(err){return val}}function matchPath(routepath,path,exact,parentKeys,parentParams){exact=!!exact;var cacheKey="".concat(routepath,"|").concat(exact),regexp=cache.get(cacheKey);if(!regexp){var keys=[];regexp={keys:keys,pattern:pathToRegexp_1(routepath,keys,{end:exact,strict:""===routepath})};cache.set(cacheKey,regexp)}var m=regexp.pattern.exec(path);if(!m){return null}for(var params=Object.assign({},parentParams),i=1;i<m.length;i++){var key=regexp.keys[i-1],prop=key.name,value=m[i];if(value!==void 0||!hasOwnProperty.call(params,prop)){if(key.repeat){params[prop]=value?value.split(key.delimiter).map(decodeParam):[]}else{params[prop]=value?decodeParam(value):value}}}return{path:m[0],keys:(parentKeys||[]).concat(regexp.keys),params:params}}/**
+   */var hasOwnProperty=Object.prototype.hasOwnProperty,cache$1=new Map;// see https://github.com/pillarjs/path-to-regexp/issues/148
+cache$1.set("|false",{keys:[],pattern:/(?:)/});function decodeParam(val){try{return decodeURIComponent(val)}catch(err){return val}}function matchPath(routepath,path,exact,parentKeys,parentParams){exact=!!exact;var cacheKey="".concat(routepath,"|").concat(exact),regexp=cache$1.get(cacheKey);if(!regexp){var keys=[];regexp={keys:keys,pattern:pathToRegexp_1(routepath,keys,{end:exact,strict:""===routepath})};cache$1.set(cacheKey,regexp)}var m=regexp.pattern.exec(path);if(!m){return null}for(var params=Object.assign({},parentParams),i=1;i<m.length;i++){var key=regexp.keys[i-1],prop=key.name,value=m[i];if(value!==void 0||!hasOwnProperty.call(params,prop)){if(key.repeat){params[prop]=value?value.split(key.delimiter).map(decodeParam):[]}else{params[prop]=value?decodeParam(value):value}}}return{path:m[0],keys:(parentKeys||[]).concat(regexp.keys),params:params}}/**
    * Universal Router (https://www.kriasoft.com/universal-router/)
    *
    * Copyright (c) 2015-present Kriasoft.
@@ -6971,29 +6944,29 @@
        */},{key:"resolve",value:function resolve(pathnameOrContext){var _this=this,context=Object.assign({},this.context,isString(pathnameOrContext)?{pathname:pathnameOrContext}:pathnameOrContext),match=matchRoute(this.root,this.__normalizePathname(context.pathname),this.baseUrl),resolve=this.resolveRoute,matches=null,nextMatches=null,currentContext=context;function next(resume){var parent=1<arguments.length&&arguments[1]!==void 0?arguments[1]:matches.value.route,prevResult=2<arguments.length?arguments[2]:void 0,routeToSkip=null===prevResult&&matches.value.route;matches=nextMatches||match.next(routeToSkip);nextMatches=null;if(!resume){if(matches.done||!isChildRoute(parent,matches.value.route)){nextMatches=matches;return Promise.resolve(notFoundResult)}}if(matches.done){return Promise.reject(getNotFoundError(context))}currentContext=Object.assign(currentContext?{chain:currentContext.chain?currentContext.chain.slice(0):[]}:{},context,matches.value);updateChainForRoute(currentContext,matches.value);return Promise.resolve(resolve(currentContext)).then(function(resolution){if(null!==resolution&&resolution!==void 0&&resolution!==notFoundResult){currentContext.result=resolution.result||resolution;return currentContext}return next(resume,parent,resolution)})}context.next=next;return Promise.resolve().then(function(){return next(!0,_this.root)}).catch(function(error){var errorMessage=generateErrorMessage(currentContext);if(!error){error=new Error(errorMessage)}else{console.warn(errorMessage)}error.context=error.context||currentContext;// DOMException has its own code which is read-only
 if(!babelHelpers.instanceof(error,DOMException)){error.code=error.code||500}if(_this.errorHandler){currentContext.result=_this.errorHandler(error);return currentContext}throw error})}/**
        * URL constructor polyfill hook. Creates and returns an URL instance.
-       */},{key:"__normalizePathname",/**
+       */},{key:"__effectiveBaseUrl",get:/**
+       * If the baseUrl property is set, transforms the baseUrl and returns the full
+       * actual `base` string for using in the `new URL(path, base);` and for
+       * prepernding the paths with. The returned base ends with a trailing slash.
+       *
+       * Otherwise, returns empty string.
+       */function get(){return this.baseUrl?this.constructor.__createUrl(this.baseUrl,document.baseURI||document.URL).href.replace(/[^\/]*$/,""):""}/**
        * If the baseUrl is set, matches the pathname with the router’s baseUrl,
        * and returns the local pathname with the baseUrl stripped out.
        *
        * If the pathname does not match the baseUrl, returns undefined.
        *
        * If the `baseUrl` is not set, returns the unmodified pathname argument.
-       */value:function __normalizePathname(pathname){if(!this.baseUrl){// No base URL, no need to transform the pathname.
-return pathname}var base=this.__effectiveBaseUrl,normalizedUrl=this.constructor.__createUrl(pathname,base).href;if(normalizedUrl.slice(0,base.length)===base){return normalizedUrl.slice(base.length)}}},{key:"__effectiveBaseUrl",/**
-       * If the baseUrl property is set, transforms the baseUrl and returns the full
-       * actual `base` string for using in the `new URL(path, base);` and for
-       * prepernding the paths with. The returned base ends with a trailing slash.
-       *
-       * Otherwise, returns empty string.
-       */get:function get(){return this.baseUrl?this.constructor.__createUrl(this.baseUrl,document.baseURI||document.URL).href.replace(/[^\/]*$/,""):""}}],[{key:"__createUrl",value:function __createUrl(url,base){return new URL(url,base)}}]);return Resolver}();Resolver.pathToRegexp=pathToRegexp_1;/**
+       */},{key:"__normalizePathname",value:function __normalizePathname(pathname){if(!this.baseUrl){// No base URL, no need to transform the pathname.
+return pathname}var base=this.__effectiveBaseUrl,normalizedUrl=this.constructor.__createUrl(pathname,base).href;if(normalizedUrl.slice(0,base.length)===base){return normalizedUrl.slice(base.length)}}}],[{key:"__createUrl",value:function __createUrl(url,base){return new URL(url,base)}}]);return Resolver}();Resolver.pathToRegexp=pathToRegexp_1;/**
    * Universal Router (https://www.kriasoft.com/universal-router/)
    *
    * Copyright (c) 2015-present Kriasoft.
    *
    * This source code is licensed under the MIT license found in the
    * LICENSE.txt file in the root directory of this source tree.
-   */var pathToRegexp$1=Resolver.pathToRegexp,cache$1=new Map;function cacheRoutes(routesByName,route,routes){var name=route.name||route.component;if(name){if(routesByName.has(name)){routesByName.get(name).push(route)}else{routesByName.set(name,[route])}}if(Array.isArray(routes)){for(var i=0,childRoute;i<routes.length;i++){childRoute=routes[i];childRoute.parent=route;cacheRoutes(routesByName,childRoute,childRoute.__children||childRoute.children)}}}function getRouteByName(routesByName,routeName){var routes=routesByName.get(routeName);if(routes&&1<routes.length){throw new Error("Duplicate route with name \"".concat(routeName,"\".")+" Try seting unique 'name' route properties.")}return routes&&routes[0]}function getRoutePath(route){var path=route.path;path=Array.isArray(path)?path[0]:path;return path!==void 0?path:""}function generateUrls(router){var options=1<arguments.length&&arguments[1]!==void 0?arguments[1]:{};if(!babelHelpers.instanceof(router,Resolver)){throw new TypeError("An instance of Resolver is expected")}var routesByName=new Map;return function(routeName,params){var route=getRouteByName(routesByName,routeName);if(!route){routesByName.clear();// clear cache
-cacheRoutes(routesByName,router.root,router.root.__children);route=getRouteByName(routesByName,routeName);if(!route){throw new Error("Route \"".concat(routeName,"\" not found"))}}var regexp=cache$1.get(route.fullPath);if(!regexp){var fullPath=getRoutePath(route),rt=route.parent;while(rt){var path=getRoutePath(rt);if(path){fullPath=path.replace(/\/$/,"")+"/"+fullPath.replace(/^\//,"")}rt=rt.parent}for(var tokens=pathToRegexp$1.parse(fullPath),toPath=pathToRegexp$1.tokensToFunction(tokens),keys=Object.create(null),i=0;i<tokens.length;i++){if(!isString(tokens[i])){keys[tokens[i].name]=!0}}regexp={toPath:toPath,keys:keys};cache$1.set(fullPath,regexp);route.fullPath=fullPath}var url=regexp.toPath(params,options)||"/";if(options.stringifyQueryParams&&params){for(var queryParams={},_keys=Object.keys(params),_i=0,key;_i<_keys.length;_i++){key=_keys[_i];if(!regexp.keys[key]){queryParams[key]=params[key]}}var query=options.stringifyQueryParams(queryParams);if(query){url+="?"===query.charAt(0)?query:"?".concat(query)}}return url}}/**
+   */var pathToRegexp=Resolver.pathToRegexp,cache=new Map;function cacheRoutes(routesByName,route,routes){var name=route.name||route.component;if(name){if(routesByName.has(name)){routesByName.get(name).push(route)}else{routesByName.set(name,[route])}}if(Array.isArray(routes)){for(var i=0,childRoute;i<routes.length;i++){childRoute=routes[i];childRoute.parent=route;cacheRoutes(routesByName,childRoute,childRoute.__children||childRoute.children)}}}function getRouteByName(routesByName,routeName){var routes=routesByName.get(routeName);if(routes&&1<routes.length){throw new Error("Duplicate route with name \"".concat(routeName,"\".")+" Try seting unique 'name' route properties.")}return routes&&routes[0]}function getRoutePath(route){var path=route.path;path=Array.isArray(path)?path[0]:path;return path!==void 0?path:""}function generateUrls(router){var options=1<arguments.length&&arguments[1]!==void 0?arguments[1]:{};if(!babelHelpers.instanceof(router,Resolver)){throw new TypeError("An instance of Resolver is expected")}var routesByName=new Map;return function(routeName,params){var route=getRouteByName(routesByName,routeName);if(!route){routesByName.clear();// clear cache
+cacheRoutes(routesByName,router.root,router.root.__children);route=getRouteByName(routesByName,routeName);if(!route){throw new Error("Route \"".concat(routeName,"\" not found"))}}var regexp=cache.get(route.fullPath);if(!regexp){var fullPath=getRoutePath(route),rt=route.parent;while(rt){var path=getRoutePath(rt);if(path){fullPath=path.replace(/\/$/,"")+"/"+fullPath.replace(/^\//,"")}rt=rt.parent}for(var tokens=pathToRegexp.parse(fullPath),toPath=pathToRegexp.tokensToFunction(tokens),keys=Object.create(null),i=0;i<tokens.length;i++){if(!isString(tokens[i])){keys[tokens[i].name]=!0}}regexp={toPath:toPath,keys:keys};cache.set(fullPath,regexp);route.fullPath=fullPath}var url=regexp.toPath(params,options)||"/";if(options.stringifyQueryParams&&params){for(var queryParams={},_keys=Object.keys(params),_i=0,key;_i<_keys.length;_i++){key=_keys[_i];if(!regexp.keys[key]){queryParams[key]=params[key]}}var query=options.stringifyQueryParams(queryParams);if(query){url+="?"===query.charAt(0)?query:"?".concat(query)}}return url}}/**
    * @typedef NavigationTrigger
    * @type {object}
    * @property {function()} activate
@@ -7269,7 +7242,7 @@
        * See also **Navigation Triggers** section in [Live Examples](#/classes/Router/demos/demo/index.html).
        *
        * @param {...NavigationTrigger} triggers
-       */},{key:"urlForName",/**
+       */},{key:"urlForName",value:/**
        * Generates a URL for the route with the given name, optionally performing
        * substitution of parameters.
        *
@@ -7287,7 +7260,7 @@
        * parameters are passed by index (`params[index] = value`).
        *
        * @return {string}
-       */value:function urlForName(name,params){if(!this.__urlForName){this.__urlForName=generateUrls(this)}return getPathnameForRouter(this.__urlForName(name,params),this)}/**
+       */function urlForName(name,params){if(!this.__urlForName){this.__urlForName=generateUrls(this)}return getPathnameForRouter(this.__urlForName(name,params),this)}/**
        * Generates a URL for the given route path, optionally performing
        * substitution of parameters.
        *
@@ -7308,7 +7281,7 @@
        *   string property, and optional `search` and `hash` string properties.
        * @return {boolean}
        */}],[{key:"setTriggers",value:function setTriggers(){for(var _len=arguments.length,triggers=Array(_len),_key=0;_key<_len;_key++){triggers[_key]=arguments[_key]}setNavigationTriggers(triggers)}},{key:"go",value:function go(path){var _ref4=isString(path)?this.__createUrl(path,"http://a")// some base to omit origin
-:path,pathname=_ref4.pathname,search=_ref4.search,hash=_ref4.hash;return fireRouterEvent("go",{pathname:pathname,search:search,hash:hash})}}]);return Router}(Resolver),DEV_MODE_CODE_REGEXP=/\/\*\*\s+vaadin-dev-mode:start([\s\S]*)vaadin-dev-mode:end\s+\*\*\//i,FlowClients=window.Vaadin&&window.Vaadin.Flow&&window.Vaadin.Flow.clients;function isMinified(){function test(){/** vaadin-dev-mode:start
+:path,pathname=_ref4.pathname,search=_ref4.search,hash=_ref4.hash;return fireRouterEvent("go",{pathname:pathname,search:search,hash:hash})}}]);return Router}(Resolver),DEV_MODE_CODE_REGEXP=/\/\*[\*!]\s+vaadin-dev-mode:start([\s\S]*)vaadin-dev-mode:end\s+\*\*\//i,FlowClients=window.Vaadin&&window.Vaadin.Flow&&window.Vaadin.Flow.clients;function isMinified(){function test(){/** vaadin-dev-mode:start
       return false;
       vaadin-dev-mode:end **/return!0}return uncommentAndRun(test)}function isDevelopmentMode(){try{if(isForcedDevelopmentMode()){return!0}if(!isLocalhost()){return!1}if(FlowClients){return!isFlowProductionMode()}return!isMinified()}catch(e){// Some error in this code, assume production so no further actions will be taken
 return!1}}function isForcedDevelopmentMode(){return localStorage.getItem("vaadin.developmentmode.force")}function isLocalhost(){return 0<=["localhost","127.0.0.1"].indexOf(window.location.hostname)}function isFlowProductionMode(){if(FlowClients){var productionModeApps=Object.keys(FlowClients).map(function(key){return FlowClients[key]}).filter(function(client){return client.productionMode});if(0<productionModeApps.length){return!0}}return!1}function uncommentAndRun(callback,args){if("function"!==typeof callback){return}var match=DEV_MODE_CODE_REGEXP.exec(callback.toString());if(match){try{// requires CSP: script-src 'unsafe-eval'
@@ -7737,7 +7710,7 @@
     }], [{
       key: 'version',
       get: function get$1() {
-        return '2.1.0';
+        return '2.1.2';
       }
     }, {
       key: 'firstUseKey',
@@ -7765,7 +7738,7 @@
     // Intentionally ignored as this is not a problem in the app being developed
     }
     }());
-     vaadin-dev-mode:end **/}var usageStatistics=function usageStatistics(){if("function"===typeof runIfDevelopmentMode){return runIfDevelopmentMode(maybeGatherAndSendStats)}};window.Vaadin=window.Vaadin||{};window.Vaadin.registrations=window.Vaadin.registrations||[];window.Vaadin.registrations.push({is:"@vaadin/router",version:"1.7.3"});usageStatistics();Router.NavigationTrigger={POPSTATE:POPSTATE,CLICK:CLICK};var isUrlAvailable,urlDocument,urlBase,urlAnchor;Resolver.__ensureUrlAvailableOrPolyfilled=function(){if(isUrlAvailable===void 0){try{var url=new URL("b","http://a");url.pathname="c";isUrlAvailable="http://a/c"===url.href}catch(e){isUrlAvailable=!1}if(!isUrlAvailable){// The URL constructor is not available in IE11. Polyfill it by creating
+     vaadin-dev-mode:end **/}var usageStatistics=function usageStatistics(){if("function"===typeof runIfDevelopmentMode){return runIfDevelopmentMode(maybeGatherAndSendStats)}};window.Vaadin=window.Vaadin||{};window.Vaadin.registrations=window.Vaadin.registrations||[];window.Vaadin.registrations.push({is:"@vaadin/router",version:"1.7.4"});usageStatistics();Router.NavigationTrigger={POPSTATE:POPSTATE,CLICK:CLICK};var isUrlAvailable,urlDocument,urlBase,urlAnchor;Resolver.__ensureUrlAvailableOrPolyfilled=function(){if(isUrlAvailable===void 0){try{var url=new URL("b","http://a");url.pathname="c";isUrlAvailable="http://a/c"===url.href}catch(e){isUrlAvailable=!1}if(!isUrlAvailable){// The URL constructor is not available in IE11. Polyfill it by creating
 // an HTMLAnchorElement in an in-memory HTML document.
 urlDocument=document.implementation.createHTMLDocument("url");urlBase=urlDocument.createElement("base");urlDocument.head.appendChild(urlBase);urlAnchor=urlDocument.createElement("a");if(!urlAnchor.origin){// IE11: HTMLAnchorElement does not have the `origin` property
 Object.defineProperty(urlAnchor,"origin",{get:function get(){// IE11: on HTTP and HTTPS the default port is not included into
@@ -7775,4 +7748,4 @@
 // (`protocol`, `host`, `port`, and such), otherwise they are empty.
 urlAnchor.href=urlAnchor.href;// eslint-disable-line no-self-assign
 return urlAnchor};exports.Resolver=Resolver;exports.Router=Router;Object.defineProperty(exports,"__esModule",{value:!0})});</script><script>// In order to make the demos work without the import statement there
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\ No newline at end of file
+window.Router=window.Vaadin.Router;</script><dom-module id="x-home-view" assetpath="demo-elements/"><template><style>:host{display:block;}</style><h1>Home</h1></template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){var 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Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}var XImageView=/*#__PURE__*/function(_Vaadin$ThemableMixin){babelHelpers.inherits(XImageView,_Vaadin$ThemableMixin);var _super=_createSuper(XImageView);function XImageView(){babelHelpers.classCallCheck(this,XImageView);return _super.apply(this,arguments)}babelHelpers.createClass(XImageView,null,[{key:"is",get:function get(){return"x-image-view"}},{key:"properties",get:function get(){return{location:Object}}}]);return XImageView}(Vaadin.ThemableMixin(Polymer.Element));window.customElements.define(XImageView.is,XImageView);</script></dom-module><dom-module id="x-knowledge-base" assetpath="demo-elements/"><template preserve-content="">Knowledge base path: '[[location.params.path]]'</template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}var XKnowledgeBase=/*#__PURE__*/function(_Vaadin$ThemableMixin){babelHelpers.inherits(XKnowledgeBase,_Vaadin$ThemableMixin);var _super=_createSuper(XKnowledgeBase);function XKnowledgeBase(){babelHelpers.classCallCheck(this,XKnowledgeBase);return _super.apply(this,arguments)}babelHelpers.createClass(XKnowledgeBase,null,[{key:"is",get:function get(){return"x-knowledge-base"}},{key:"properties",get:function get(){return{location:Object}}}]);return XKnowledgeBase}(Vaadin.ThemableMixin(Polymer.Element));window.customElements.define(XKnowledgeBase.is,XKnowledgeBase);</script></dom-module><dom-module id="x-user-list" assetpath="demo-elements/"><template><style>:host{display:block;}</style><h1>Users</h1><ul><li><a href="/users/kim">Kim</a></li><li><a href="/users/jane">Jane</a></li><li><a href="/users/sam">Sam</a></li></ul></template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){var XUserList=/*#__PURE__*/function(_Vaadin$ThemableMixin){babelHelpers.inherits(XUserList,_Vaadin$ThemableMixin);var _super=_createSuper(XUserList);function XUserList(){babelHelpers.classCallCheck(this,XUserList);return _super.apply(this,arguments)}babelHelpers.createClass(XUserList,null,[{key:"is",get:function get(){return"x-user-list"}},{key:"properties",get:function get(){return{}}}]);return XUserList}(Vaadin.ThemableMixin(Polymer.Element));customElements.define(XUserList.is,XUserList)})();</script></dom-module><dom-module id="x-user-profile" assetpath="demo-elements/"><template><style>:host{display:block;}</style><h1>User Profile</h1><p>Name: [[location.params.user]]</p></template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){var XUserProfile=/*#__PURE__*/function(_Vaadin$ThemableMixin){babelHelpers.inherits(XUserProfile,_Vaadin$ThemableMixin);var _super=_createSuper(XUserProfile);function XUserProfile(){babelHelpers.classCallCheck(this,XUserProfile);return _super.apply(this,arguments)}babelHelpers.createClass(XUserProfile,null,[{key:"is",get:function get(){return"x-user-profile"}},{key:"properties",get:function get(){return{location:Object}}}]);return XUserProfile}(Vaadin.ThemableMixin(Polymer.Element));customElements.define(XUserProfile.is,XUserProfile)})();</script></dom-module><dom-module id="x-not-found-view" assetpath="demo-elements/"><template><style>:host{display:block;}</style><h1>404</h1><p>View not found</p></template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){var XNotFoundView=/*#__PURE__*/function(_Vaadin$ThemableMixin){babelHelpers.inherits(XNotFoundView,_Vaadin$ThemableMixin);var _super=_createSuper(XNotFoundView);function XNotFoundView(){babelHelpers.classCallCheck(this,XNotFoundView);return _super.apply(this,arguments)}babelHelpers.createClass(XNotFoundView,null,[{key:"is",get:function get(){return"x-not-found-view"}}]);return XNotFoundView}(Vaadin.ThemableMixin(Polymer.Element));customElements.define(XNotFoundView.is,XNotFoundView)})();</script></dom-module><dom-module id="x-profile-view" assetpath="demo-elements/"><template preserve-content="">User ID: [[location.params.id]]<br><code>/user</code> or <code>/users</code>: [[location.params.0]]</template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof 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_createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){var XUserNumericView=/*#__PURE__*/function(_Vaadin$ThemableMixin){babelHelpers.inherits(XUserNumericView,_Vaadin$ThemableMixin);var _super=_createSuper(XUserNumericView);function XUserNumericView(){babelHelpers.classCallCheck(this,XUserNumericView);return _super.apply(this,arguments)}babelHelpers.createClass(XUserNumericView,null,[{key:"is",get:function get(){return"x-user-numeric-view"}},{key:"properties",get:function get(){return{location:Object}}}]);return XUserNumericView}(Vaadin.ThemableMixin(Polymer.Element));customElements.define(XUserNumericView.is,XUserNumericView)})();</script></dom-module><dom-module id="x-user-not-found-view" assetpath="demo-elements/"><template><style>:host{display:block;}</style><h1>The princess is in another castle</h1><p>You've come to <code>[[location.pathname]]</code>, but alas, there is nothing there.</p></template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof 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with OAuth</button></template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}(function(){var XHomeView=/*#__PURE__*/function(_Vaadin$ThemableMixin){babelHelpers.inherits(XHomeView,_Vaadin$ThemableMixin);var _super=_createSuper(XHomeView);function XHomeView(){babelHelpers.classCallCheck(this,XHomeView);return _super.apply(this,arguments)}babelHelpers.createClass(XHomeView,[{key:"login",value:function login(){window.authorized=!0;window.dispatchEvent(new CustomEvent("vaadin-router-go",{detail:{pathname:this.location.params.to||"/"}}))}}],[{key:"is",get:function get(){return"x-login-view"}}]);return XHomeView}(Vaadin.ThemableMixin(Polymer.Element));customElements.define(XHomeView.is,XHomeView)})();</script></dom-module><dom-module id="x-breadcrumbs" assetpath="demo-elements/"><template preserve-content=""><style>:host{display:block;}</style>Location:<dom-repeat items="[[items]]"><template><a href$="[[item.href]]">[[item.title]]</a><dom-if if="[[__isNotLastIndexOf(items, index)]]"><template><span class="delimiter">&gt;</span></template></dom-if></template></dom-repeat></template><script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}var XBreadcrumbs=/*#__PURE__*/function(_Vaadin$ThemableMixin){babelHelpers.inherits(XBreadcrumbs,_Vaadin$ThemableMixin);var _super=_createSuper(XBreadcrumbs);function XBreadcrumbs(){babelHelpers.classCallCheck(this,XBreadcrumbs);return _super.apply(this,arguments)}babelHelpers.createClass(XBreadcrumbs,[{key:"__isNotLastIndexOf",value:function __isNotLastIndexOf(items,i){return i<items.length-1}}],[{key:"is",get:function get(){return"x-breadcrumbs"}},{key:"properties",get:function get(){return{items:Array}}}]);return XBreadcrumbs}(Vaadin.ThemableMixin(Polymer.Element));window.customElements.define(XBreadcrumbs.is,XBreadcrumbs);</script></dom-module></div></body></html>
\ No newline at end of file
diff --git a/docs/vaadin-router/demo/vaadin-router-animated-transitions-demos.html b/docs/vaadin-router/demo/vaadin-router-animated-transitions-demos.html
index 297ce131..be83aef0 100644
--- a/docs/vaadin-router/demo/vaadin-router-animated-transitions-demos.html
+++ b/docs/vaadin-router/demo/vaadin-router-animated-transitions-demos.html
@@ -205,5 +205,5 @@ <h3>Customize CSS Classes</h3>
       </template>
     </vaadin-demo-snippet>
   </template>
-  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterAnimatedTransitionsDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterAnimatedTransitionsDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterAnimatedTransitionsDemos);function VaadinRouterAnimatedTransitionsDemos(){babelHelpers.classCallCheck(this,VaadinRouterAnimatedTransitionsDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterAnimatedTransitionsDemos,null,[{key:"is",get:function get(){return"vaadin-router-animated-transitions-demos"}}]);return VaadinRouterAnimatedTransitionsDemos}(DemoReadyEventEmitter(ElementDemo(Polymer.Element)));customElements.define(VaadinRouterAnimatedTransitionsDemos.is,VaadinRouterAnimatedTransitionsDemos);</script>
+  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterAnimatedTransitionsDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterAnimatedTransitionsDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterAnimatedTransitionsDemos);function VaadinRouterAnimatedTransitionsDemos(){babelHelpers.classCallCheck(this,VaadinRouterAnimatedTransitionsDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterAnimatedTransitionsDemos,null,[{key:"is",get:function get(){return"vaadin-router-animated-transitions-demos"}}]);return VaadinRouterAnimatedTransitionsDemos}(DemoReadyEventEmitter(ElementDemo(Polymer.Element)));customElements.define(VaadinRouterAnimatedTransitionsDemos.is,VaadinRouterAnimatedTransitionsDemos);</script>
 </dom-module>
diff --git a/docs/vaadin-router/demo/vaadin-router-code-splitting-demos.html b/docs/vaadin-router/demo/vaadin-router-code-splitting-demos.html
index 7d9a30de..f19e6bd3 100644
--- a/docs/vaadin-router/demo/vaadin-router-code-splitting-demos.html
+++ b/docs/vaadin-router/demo/vaadin-router-code-splitting-demos.html
@@ -198,5 +198,5 @@ <h3>Splitting and Lazy-Loading the Routes Configuration</h3>
       </template>
     </vaadin-demo-snippet>
   </template>
-  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterCodeSplittingDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterCodeSplittingDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterCodeSplittingDemos);function VaadinRouterCodeSplittingDemos(){babelHelpers.classCallCheck(this,VaadinRouterCodeSplittingDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterCodeSplittingDemos,null,[{key:"is",get:function get(){return"vaadin-router-code-splitting-demos"}}]);return VaadinRouterCodeSplittingDemos}(DemoReadyEventEmitter(ElementDemo(Polymer.Element)));customElements.define(VaadinRouterCodeSplittingDemos.is,VaadinRouterCodeSplittingDemos);</script>
+  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterCodeSplittingDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterCodeSplittingDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterCodeSplittingDemos);function VaadinRouterCodeSplittingDemos(){babelHelpers.classCallCheck(this,VaadinRouterCodeSplittingDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterCodeSplittingDemos,null,[{key:"is",get:function get(){return"vaadin-router-code-splitting-demos"}}]);return VaadinRouterCodeSplittingDemos}(DemoReadyEventEmitter(ElementDemo(Polymer.Element)));customElements.define(VaadinRouterCodeSplittingDemos.is,VaadinRouterCodeSplittingDemos);</script>
 </dom-module>
diff --git a/docs/vaadin-router/demo/vaadin-router-getting-started-demos.html b/docs/vaadin-router/demo/vaadin-router-getting-started-demos.html
index daa7adff..6306251a 100644
--- a/docs/vaadin-router/demo/vaadin-router-getting-started-demos.html
+++ b/docs/vaadin-router/demo/vaadin-router-getting-started-demos.html
@@ -330,7 +330,7 @@ <h3>Excluded links</h3>
       </template>
     </vaadin-demo-snippet>
   </template>
-  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterGettingStartedDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterGettingStartedDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterGettingStartedDemos);function VaadinRouterGettingStartedDemos(){babelHelpers.classCallCheck(this,VaadinRouterGettingStartedDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterGettingStartedDemos,[{key:"ready",value:function ready(){babelHelpers.get(babelHelpers.getPrototypeOf(VaadinRouterGettingStartedDemos.prototype),"ready",this).call(this);// The base URL demo should '/ui/' initially instead of the default '/'
+  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterGettingStartedDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterGettingStartedDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterGettingStartedDemos);function VaadinRouterGettingStartedDemos(){babelHelpers.classCallCheck(this,VaadinRouterGettingStartedDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterGettingStartedDemos,[{key:"ready",value:function ready(){babelHelpers.get(babelHelpers.getPrototypeOf(VaadinRouterGettingStartedDemos.prototype),"ready",this).call(this);// The base URL demo should '/ui/' initially instead of the default '/'
 // TODO(platosha): Remove the workaround below after)
 // https://github.com/vaadin/vaadin-demo-helpers/issues/60 is fixed
 var baseUrlDemoSnippet=this.$["vaadin-router-getting-started-demo-base-url"],origShowDemo=baseUrlDemoSnippet._showDemo;baseUrlDemoSnippet._showDemo=function(){origShowDemo.apply(this,arguments);var iframeDemoRenderer=baseUrlDemoSnippet.$.demo.firstElementChild;iframeDemoRenderer.__iframeReady.then(function(){iframeDemoRenderer.url="/ui/";iframeDemoRenderer._postIframeMessage({type:"set-url",url:"/ui/"})})};// TODO(vlukashov): Remove the workaround, and implement the feature in
diff --git a/docs/vaadin-router/demo/vaadin-router-lifecycle-callbacks-demos.html b/docs/vaadin-router/demo/vaadin-router-lifecycle-callbacks-demos.html
index 1258260d..096bcdb4 100644
--- a/docs/vaadin-router/demo/vaadin-router-lifecycle-callbacks-demos.html
+++ b/docs/vaadin-router/demo/vaadin-router-lifecycle-callbacks-demos.html
@@ -518,5 +518,5 @@ <h3>TypeScript Interfaces</h3>
       </li>
     </ul>
   </template>
-  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterLifecycleCallbacksDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterLifecycleCallbacksDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterLifecycleCallbacksDemos);function VaadinRouterLifecycleCallbacksDemos(){babelHelpers.classCallCheck(this,VaadinRouterLifecycleCallbacksDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterLifecycleCallbacksDemos,null,[{key:"is",get:function get(){return"vaadin-router-lifecycle-callbacks-demos"}}]);return VaadinRouterLifecycleCallbacksDemos}(DemoReadyEventEmitter(ElementDemo(Polymer.Element)));customElements.define(VaadinRouterLifecycleCallbacksDemos.is,VaadinRouterLifecycleCallbacksDemos);</script>
+  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterLifecycleCallbacksDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterLifecycleCallbacksDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterLifecycleCallbacksDemos);function VaadinRouterLifecycleCallbacksDemos(){babelHelpers.classCallCheck(this,VaadinRouterLifecycleCallbacksDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterLifecycleCallbacksDemos,null,[{key:"is",get:function get(){return"vaadin-router-lifecycle-callbacks-demos"}}]);return VaadinRouterLifecycleCallbacksDemos}(DemoReadyEventEmitter(ElementDemo(Polymer.Element)));customElements.define(VaadinRouterLifecycleCallbacksDemos.is,VaadinRouterLifecycleCallbacksDemos);</script>
 </dom-module>
diff --git a/docs/vaadin-router/demo/vaadin-router-navigation-trigger-demos.html b/docs/vaadin-router/demo/vaadin-router-navigation-trigger-demos.html
index 94df3144..f3623279 100644
--- a/docs/vaadin-router/demo/vaadin-router-navigation-trigger-demos.html
+++ b/docs/vaadin-router/demo/vaadin-router-navigation-trigger-demos.html
@@ -185,5 +185,5 @@ <h3>Unsubscribe from Navigation Events</h3>
       </template>
     </vaadin-demo-snippet>
   </template>
-  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterNavigationTriggerDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterNavigationTriggerDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterNavigationTriggerDemos);function VaadinRouterNavigationTriggerDemos(){babelHelpers.classCallCheck(this,VaadinRouterNavigationTriggerDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterNavigationTriggerDemos,null,[{key:"is",get:function get(){return"vaadin-router-navigation-trigger-demos"}}]);return VaadinRouterNavigationTriggerDemos}(DemoReadyEventEmitter(ElementDemo(Polymer.Element)));customElements.define(VaadinRouterNavigationTriggerDemos.is,VaadinRouterNavigationTriggerDemos);</script>
+  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterNavigationTriggerDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterNavigationTriggerDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterNavigationTriggerDemos);function VaadinRouterNavigationTriggerDemos(){babelHelpers.classCallCheck(this,VaadinRouterNavigationTriggerDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterNavigationTriggerDemos,null,[{key:"is",get:function get(){return"vaadin-router-navigation-trigger-demos"}}]);return VaadinRouterNavigationTriggerDemos}(DemoReadyEventEmitter(ElementDemo(Polymer.Element)));customElements.define(VaadinRouterNavigationTriggerDemos.is,VaadinRouterNavigationTriggerDemos);</script>
 </dom-module>
diff --git a/docs/vaadin-router/demo/vaadin-router-redirect-demos.html b/docs/vaadin-router/demo/vaadin-router-redirect-demos.html
index b3701086..67b08e5c 100644
--- a/docs/vaadin-router/demo/vaadin-router-redirect-demos.html
+++ b/docs/vaadin-router/demo/vaadin-router-redirect-demos.html
@@ -185,5 +185,5 @@ <h3>Navigation from JavaScript</h3>
       </script>
     </marked-element>
   </template>
-  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterRedirectDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterRedirectDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterRedirectDemos);function VaadinRouterRedirectDemos(){babelHelpers.classCallCheck(this,VaadinRouterRedirectDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterRedirectDemos,null,[{key:"is",get:function get(){return"vaadin-router-redirect-demos"}}]);return VaadinRouterRedirectDemos}(DemoReadyEventEmitter(ElementDemo(Polymer.Element)));customElements.define(VaadinRouterRedirectDemos.is,VaadinRouterRedirectDemos);</script>
+  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterRedirectDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterRedirectDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterRedirectDemos);function VaadinRouterRedirectDemos(){babelHelpers.classCallCheck(this,VaadinRouterRedirectDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterRedirectDemos,null,[{key:"is",get:function get(){return"vaadin-router-redirect-demos"}}]);return VaadinRouterRedirectDemos}(DemoReadyEventEmitter(ElementDemo(Polymer.Element)));customElements.define(VaadinRouterRedirectDemos.is,VaadinRouterRedirectDemos);</script>
 </dom-module>
diff --git a/docs/vaadin-router/demo/vaadin-router-route-actions-demos.html b/docs/vaadin-router/demo/vaadin-router-route-actions-demos.html
index d88515f0..de4ac5bf 100644
--- a/docs/vaadin-router/demo/vaadin-router-route-actions-demos.html
+++ b/docs/vaadin-router/demo/vaadin-router-route-actions-demos.html
@@ -304,5 +304,5 @@ <h3>Routing With Search Query and Hash</h3>
       </template>
     </vaadin-demo-snippet>
   </template>
-  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterRouteActionsDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterRouteActionsDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterRouteActionsDemos);function VaadinRouterRouteActionsDemos(){babelHelpers.classCallCheck(this,VaadinRouterRouteActionsDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterRouteActionsDemos,null,[{key:"is",get:function get(){return"vaadin-router-route-actions-demos"}}]);return VaadinRouterRouteActionsDemos}(DemoReadyEventEmitter(ElementDemo(Polymer.Element)));customElements.define(VaadinRouterRouteActionsDemos.is,VaadinRouterRouteActionsDemos);</script>
+  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterRouteActionsDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterRouteActionsDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterRouteActionsDemos);function VaadinRouterRouteActionsDemos(){babelHelpers.classCallCheck(this,VaadinRouterRouteActionsDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterRouteActionsDemos,null,[{key:"is",get:function get(){return"vaadin-router-route-actions-demos"}}]);return VaadinRouterRouteActionsDemos}(DemoReadyEventEmitter(ElementDemo(Polymer.Element)));customElements.define(VaadinRouterRouteActionsDemos.is,VaadinRouterRouteActionsDemos);</script>
 </dom-module>
diff --git a/docs/vaadin-router/demo/vaadin-router-route-parameters-demos.html b/docs/vaadin-router/demo/vaadin-router-route-parameters-demos.html
index def10761..7574f65f 100644
--- a/docs/vaadin-router/demo/vaadin-router-route-parameters-demos.html
+++ b/docs/vaadin-router/demo/vaadin-router-route-parameters-demos.html
@@ -267,5 +267,5 @@ <h3>Hash String</h3>
       </template>
     </vaadin-demo-snippet>
   </template>
-  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterRouteParametersDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterRouteParametersDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterRouteParametersDemos);function VaadinRouterRouteParametersDemos(){babelHelpers.classCallCheck(this,VaadinRouterRouteParametersDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterRouteParametersDemos,null,[{key:"is",get:function get(){return"vaadin-router-route-parameters-demos"}}]);return VaadinRouterRouteParametersDemos}(DemoReadyEventEmitter(ElementDemo(Polymer.Element)));customElements.define(VaadinRouterRouteParametersDemos.is,VaadinRouterRouteParametersDemos);</script>
+  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterRouteParametersDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterRouteParametersDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterRouteParametersDemos);function VaadinRouterRouteParametersDemos(){babelHelpers.classCallCheck(this,VaadinRouterRouteParametersDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterRouteParametersDemos,null,[{key:"is",get:function get(){return"vaadin-router-route-parameters-demos"}}]);return VaadinRouterRouteParametersDemos}(DemoReadyEventEmitter(ElementDemo(Polymer.Element)));customElements.define(VaadinRouterRouteParametersDemos.is,VaadinRouterRouteParametersDemos);</script>
 </dom-module>
diff --git a/docs/vaadin-router/demo/vaadin-router-url-generation-demos.html b/docs/vaadin-router/demo/vaadin-router-url-generation-demos.html
index 70246ebf..7eaa418b 100644
--- a/docs/vaadin-router/demo/vaadin-router-url-generation-demos.html
+++ b/docs/vaadin-router/demo/vaadin-router-url-generation-demos.html
@@ -284,7 +284,7 @@ <h3>Generating URLs with search query parameters and hash string</h3>
     </vaadin-demo-snippet>
 
   </template>
-  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Date.prototype.toString.call(Reflect.construct(Date,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterLinkGenerationDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterLinkGenerationDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterLinkGenerationDemos);function VaadinRouterLinkGenerationDemos(){babelHelpers.classCallCheck(this,VaadinRouterLinkGenerationDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterLinkGenerationDemos,[{key:"ready",value:function ready(){babelHelpers.get(babelHelpers.getPrototypeOf(VaadinRouterLinkGenerationDemos.prototype),"ready",this).call(this);// The base URL demo should '/ui/' initially instead of the default '/'
+  <script>function _createSuper(Derived){var hasNativeReflectConstruct=_isNativeReflectConstruct();return function _createSuperInternal(){var Super=babelHelpers.getPrototypeOf(Derived),result;if(hasNativeReflectConstruct){var NewTarget=babelHelpers.getPrototypeOf(this).constructor;result=Reflect.construct(Super,arguments,NewTarget)}else{result=Super.apply(this,arguments)}return babelHelpers.possibleConstructorReturn(this,result)}}function _isNativeReflectConstruct(){if("undefined"===typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"===typeof Proxy)return!0;try{Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){}));return!0}catch(e){return!1}}var VaadinRouterLinkGenerationDemos=/*#__PURE__*/function(_DemoReadyEventEmitte){babelHelpers.inherits(VaadinRouterLinkGenerationDemos,_DemoReadyEventEmitte);var _super=_createSuper(VaadinRouterLinkGenerationDemos);function VaadinRouterLinkGenerationDemos(){babelHelpers.classCallCheck(this,VaadinRouterLinkGenerationDemos);return _super.apply(this,arguments)}babelHelpers.createClass(VaadinRouterLinkGenerationDemos,[{key:"ready",value:function ready(){babelHelpers.get(babelHelpers.getPrototypeOf(VaadinRouterLinkGenerationDemos.prototype),"ready",this).call(this);// The base URL demo should '/ui/' initially instead of the default '/'
 // TODO(platosha): Remove the workaround below after
 // https://github.com/vaadin/vaadin-demo-helpers/issues/60 is fixed
 var baseUrlDemoSnippet=this.$["vaadin-router-url-generation-demo-base-url"],origShowDemo=baseUrlDemoSnippet._showDemo;baseUrlDemoSnippet._showDemo=function(){origShowDemo.apply(this,arguments);var iframeDemoRenderer=baseUrlDemoSnippet.$.demo.firstElementChild;iframeDemoRenderer.__iframeReady.then(function(){iframeDemoRenderer.url="/ui/";iframeDemoRenderer._postIframeMessage({type:"set-url",url:"/ui/"})})}}}],[{key:"is",get:function get(){return"vaadin-router-url-generation-demos"}}]);return VaadinRouterLinkGenerationDemos}(DemoReadyEventEmitter(ElementDemo(Polymer.Element)));customElements.define(VaadinRouterLinkGenerationDemos.is,VaadinRouterLinkGenerationDemos);</script>