diff --git a/packages/cli/test/fixtures/build-modules/expected/bundled-amd/index.html b/packages/cli/test/fixtures/build-modules/expected/bundled-amd/index.html
index 647a14c5d..16de126f2 100644
--- a/packages/cli/test/fixtures/build-modules/expected/bundled-amd/index.html
+++ b/packages/cli/test/fixtures/build-modules/expected/bundled-amd/index.html
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diff --git a/packages/cli/test/fixtures/build-modules/expected/unbundled-amd/index.html b/packages/cli/test/fixtures/build-modules/expected/unbundled-amd/index.html
index 377395f10..b211a9a22 100644
--- a/packages/cli/test/fixtures/build-modules/expected/unbundled-amd/index.html
+++ b/packages/cli/test/fixtures/build-modules/expected/unbundled-amd/index.html
@@ -1,6 +1,6 @@
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diff --git a/packages/esm-amd-loader/CHANGELOG.md b/packages/esm-amd-loader/CHANGELOG.md
index 257ef9499..5b17b65b1 100644
--- a/packages/esm-amd-loader/CHANGELOG.md
+++ b/packages/esm-amd-loader/CHANGELOG.md
@@ -5,7 +5,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-<!-- # Unreleased -->
+## Unreleased
+* Load AMD modules with the same crossorigin attribute as
+  document.currentScript.
 <!-- Add new, unreleased changes here. -->
 
 ## [1.0.3] - 2018-09-18
diff --git a/packages/esm-amd-loader/src/esm-amd-loader.ts b/packages/esm-amd-loader/src/esm-amd-loader.ts
index c9b8d10ef..2e27c00f8 100644
--- a/packages/esm-amd-loader/src/esm-amd-loader.ts
+++ b/packages/esm-amd-loader/src/esm-amd-loader.ts
@@ -130,8 +130,15 @@ interface ModuleG<State extends keyof StateDataMap> {
   readonly url: NormalizedUrl;
   readonly urlBase: NormalizedUrl;
   readonly exports: {[id: string]: {}};
-  /** True if this is a top-level module. */
+  /**
+   * True if this is a top-level module.
+   */
   isTopLevel: boolean;
+  /**
+   * Value of the `crossorigin` attribute that will be used to load this
+   * module.
+   */
+  readonly crossorigin: string;
   /**
    * Callbacks that are called exactly once, for the next time the module
    * progresses to a new state.
@@ -188,6 +195,11 @@ function load(module: ModuleG<StateEnum.Initialized>):
   const script = document.createElement('script');
   script.src = module.url;
 
+  // Crossorigin attribute could be the empty string - preserve this.
+  if (module.crossorigin !== null) {
+    script.setAttribute('crossorigin', module.crossorigin);
+  }
+
   /**
    * Remove our script tags from the document after they have loaded/errored, to
    * reduce the number of nodes. Since the file load order is arbitrary and not
@@ -277,7 +289,8 @@ function loadDeps(
     }
 
     // We have a dependency on a real module.
-    const dependency = getModule(resolveUrl(module.urlBase, depSpec));
+    const dependency =
+      getModule(resolveUrl(module.urlBase, depSpec), module.crossorigin);
     args.push(dependency.exports);
     depModules.push(dependency);
 
@@ -434,13 +447,22 @@ window.define = function(deps: string[], moduleBody?: OnExecutedCallback) {
   // by waiting a tick, and if we haven't already been defined by the "onload"
   // handler from case #1, then this must be case #2.
   const documentUrl = getDocumentUrl();
+
+  // Save the value of the crossorigin attribute before setTimeout while we
+  // can still get document.currentScript. If not set, default to 'anonymous'
+  // to match native <script type="module"> behavior. Note: IE11 doesn't
+  // support the crossorigin attribute nor currentScript, so it will use the
+  // default.
+  const crossorigin = document.currentScript &&
+      document.currentScript.getAttribute('crossorigin') || 'anonymous';
+
   setTimeout(() => {
     if (defined === false) {
       pendingDefine = undefined;
       const url = documentUrl + '#' + topLevelScriptIdx++ as NormalizedUrl;
       // It's actually Initialized, but we're skipping over the Loading
       // state, because this is a top level document and it's already loaded.
-      const mod = getModule(url) as ModuleG<StateEnum.Loading>;
+      const mod = getModule(url, crossorigin) as ModuleG<StateEnum.Loading>;
       mod.isTopLevel = true;
       const waitingModule = beginWaitingForTurn(mod, deps, moduleBody);
       if (previousTopLevelUrl !== undefined) {
@@ -489,7 +511,7 @@ window.define._reset = () => {
  * Return a module object from the registry for the given URL, creating one if
  * it doesn't exist yet.
  */
-function getModule(url: NormalizedUrl): Module {
+function getModule(url: NormalizedUrl, crossorigin: string = 'anonymous') {
   let mod = registry[url];
   if (mod === undefined) {
     mod = registry[url] = {
@@ -499,6 +521,7 @@ function getModule(url: NormalizedUrl): Module {
       state: StateEnum.Initialized,
       stateData: undefined,
       isTopLevel: false,
+      crossorigin,
       onNextStateChange: []
     };
   }
diff --git a/packages/esm-amd-loader/test/src/suite.ts b/packages/esm-amd-loader/test/src/suite.ts
index 3186fea25..db1485f25 100644
--- a/packages/esm-amd-loader/test/src/suite.ts
+++ b/packages/esm-amd-loader/test/src/suite.ts
@@ -49,7 +49,7 @@ interface Window {
 }
 
 interface Window {
-  executed: {[url: string]: true};
+  executed: {[url: string]: HTMLScriptElement|true};
   checkExecuted: (key: string) => void;
   executionOrder: string[];
   addExecutedForImport?: (key: string) => void;
@@ -57,10 +57,11 @@ interface Window {
 }
 
 window.checkExecuted = (key) => {
-  if (window.executed[key] === true) {
+  if (window.executed[key]) {
     throw new Error('already executed: ' + key);
   }
-  window.executed[key] = true;
+  // Note: IE11 doesn't support document.currentScript so just set mark as excuted.
+  window.executed[key] = document.currentScript as HTMLScriptElement || true;
 };
 
 setup(() => {
@@ -496,3 +497,52 @@ suite('html imports', () => {
     importHref('../html-import/meta/import-meta.html');
   });
 });
+
+suite('crossorigin attribute', () => {
+  function assertCrossoriginAttribute(crossorigin: string|null) {
+    const moduleCurrentScript = window.executed['y'];
+    if (moduleCurrentScript instanceof HTMLScriptElement) {
+      assert.equal(moduleCurrentScript.getAttribute('crossorigin'), crossorigin);
+    }
+  }
+
+  test('modules without crossorigin attribute default to anonymous', (done) => {
+    define(['./y.js'], () => {
+      assertCrossoriginAttribute('anonymous');
+      done();
+    });
+  });
+
+  test('modules with empty crossorigin attribute default to anonymous', (done) => {
+    const script = document.createElement('script');
+    script.setAttribute('crossorigin', '');
+    script.textContent = 'define(["./y.js"])';
+    document.head!.appendChild(script);
+    define(['./y.js'], () => {
+      assertCrossoriginAttribute('anonymous');
+      done();
+    });
+  });
+
+  test('modules with crossorigin=use-credentials attribute', (done) => {
+    const script = document.createElement('script');
+    script.setAttribute('crossorigin', 'use-credentials');
+    script.textContent = 'define(["./y.js"])';
+    document.head!.appendChild(script);
+    define(['./y.js'], () => {
+      assertCrossoriginAttribute('use-credentials');
+      done();
+    });
+  });
+
+  test('modules with crossorigin=anonymous attribute', (done) => {
+    const script = document.createElement('script');
+    script.setAttribute('crossorigin', 'anonymous');
+    script.textContent = 'define(["./y.js"])';
+    document.head!.appendChild(script);
+    define(['./y.js'], () => {
+      assertCrossoriginAttribute('anonymous');
+      done();
+    });
+  });
+});
diff --git a/packages/polyserve/test/bower_components/test-modules/golden/test-suite-no-wct.html b/packages/polyserve/test/bower_components/test-modules/golden/test-suite-no-wct.html
index 586515dd6..0a39d4b02 100644
--- a/packages/polyserve/test/bower_components/test-modules/golden/test-suite-no-wct.html
+++ b/packages/polyserve/test/bower_components/test-modules/golden/test-suite-no-wct.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html><html><body>
-  <script>"use strict";(function(){function a(a,b,c){var d=a;if(d.state=b,d.stateData=c,0<d.onNextStateChange.length){var e=d.onNextStateChange.slice();d.onNextStateChange.length=0;for(var f,g=0,h=e;g<h.length;g++)f=h[g],f()}return d}function b(b){function d(){try{document.head.removeChild(f)}catch(a){}}var e=a(b,"Loading",void 0),f=document.createElement("script");return f.src=b.url,f.onload=function(){var a,b,f;void 0===r?(b=[],f=void 0):(a=r(),b=a[0],f=a[1]),c(e,b,f),d()},f.onerror=function(){g(b,new TypeError("Failed to fetch "+b.url)),d()},document.head.appendChild(f),e}function c(b,c,e){var f=d(b,c),g=f[0],h=f[1];return a(b,"WaitingForTurn",{args:g,deps:h,moduleBody:e})}function d(a,c){for(var e,f=[],g=[],i=0,j=c;i<j.length;i++){if(e=j[i],"exports"===e){f.push(a.exports);continue}if("require"===e){f.push(function(b,c,e){var f=d(a,b),g=f[0],i=f[1];h(i,function(){c&&c.apply(null,g)},e)});continue}if("meta"===e){f.push({url:!0===a.isTopLevel?a.url.substring(0,a.url.lastIndexOf("#")):a.url});continue}var l=k(n(a.urlBase,e));f.push(l.exports),g.push(l),"Initialized"===l.state&&b(l)}return[f,g]}function e(b){var c=a(b,"WaitingOnDeps",b.stateData);return h(b.stateData.deps,function(){return f(c)},function(a){return g(c,a)}),c}function f(b){var c=b.stateData;if(null!=c.moduleBody)try{c.moduleBody.apply(null,c.args)}catch(a){return g(b,a)}return a(b,"Executed",void 0)}function g(b,c){return!0===b.isTopLevel&&setTimeout(function(){throw c}),a(b,"Failed",c)}function h(a,b,c){var d=a.shift();return void 0===d?void(b&&b()):"WaitingOnDeps"===d.state?(!1,void h(a,b,c)):void i(d,function(){h(a,b,c)},c)}function i(a,b,c){switch(a.state){case"WaitingForTurn":return e(a),void i(a,b,c);case"Failed":return void(c&&c(a.stateData));case"Executed":return void b();case"Loading":case"WaitingOnDeps":return void a.onNextStateChange.push(function(){return i(a,b,c)});case"Initialized":throw new Error("All dependencies should be loading already before pressureDependencyToExecute is called.");default:throw new Error("Impossible module state: "+a.state);}}function j(a,b){switch(a.state){case"Executed":case"Failed":return void b();default:a.onNextStateChange.push(function(){return j(a,b)});}}function k(a){var b=q[a];return void 0===b&&(b=q[a]={url:a,urlBase:m(a),exports:Object.create(null),state:"Initialized",stateData:void 0,isTopLevel:!1,onNextStateChange:[]}),b}function l(a){return v.href=a,v.href}function m(a){return a=a.split("?")[0],a=a.split("#")[0],a.substring(0,a.lastIndexOf("/")+1)}function n(a,b){return-1===b.indexOf("://")?l("/"===b[0]?b:a+b):b}function o(){return document.baseURI||(document.querySelector("base")||window.location).href}function p(){var b=document.currentScript;if(!b)return u;if(window.HTMLImports){var c=window.HTMLImports.importForElement(b);return c?c.href:u}var d=b.ownerDocument.createElement("a");return d.href="",d.href}if(!window.define){var q=Object.create(null),r=void 0,s=0,t=void 0,u=o();window.define=function(a,b){var d=!1;r=function(){return d=!0,r=void 0,[a,b]};var f=p();setTimeout(function(){if(!1==d){r=void 0;var g=f+"#"+s++,h=k(g);h.isTopLevel=!0;var i=c(h,a,b);void 0===t?e(i):j(k(t),function(){e(i)}),t=g}},0)},window.define._reset=function(){for(var a in q)delete q[a];r=void 0,s=0,t=void 0,u=o()};var v=document.createElement("a")}})();</script>
+  <script>"use strict";(function(){function a(a,b,c){var d=a;if(d.state=b,d.stateData=c,0<d.onNextStateChange.length){var e=d.onNextStateChange.slice();d.onNextStateChange.length=0;for(var f,g=0,h=e;g<h.length;g++)f=h[g],f()}return d}function b(b){function d(){try{document.head.removeChild(f)}catch(a){}}var e=a(b,"Loading",void 0),f=document.createElement("script");return f.src=b.url,null!==b.crossorigin&&f.setAttribute("crossorigin",b.crossorigin),f.onload=function(){var a,b,f;void 0===r?(b=[],f=void 0):(a=r(),b=a[0],f=a[1]),c(e,b,f),d()},f.onerror=function(){g(b,new TypeError("Failed to fetch "+b.url)),d()},document.head.appendChild(f),e}function c(b,c,e){var f=d(b,c),g=f[0],h=f[1];return a(b,"WaitingForTurn",{args:g,deps:h,moduleBody:e})}function d(a,c){for(var e,f=[],g=[],i=0,j=c;i<j.length;i++){if(e=j[i],"exports"===e){f.push(a.exports);continue}if("require"===e){f.push(function(b,c,e){var f=d(a,b),g=f[0],i=f[1];h(i,function(){c&&c.apply(null,g)},e)});continue}if("meta"===e){f.push({url:!0===a.isTopLevel?a.url.substring(0,a.url.lastIndexOf("#")):a.url});continue}var l=k(n(a.urlBase,e),a.crossorigin);f.push(l.exports),g.push(l),"Initialized"===l.state&&b(l)}return[f,g]}function e(b){var c=a(b,"WaitingOnDeps",b.stateData);return h(b.stateData.deps,function(){return f(c)},function(a){return g(c,a)}),c}function f(b){var c=b.stateData;if(null!=c.moduleBody)try{c.moduleBody.apply(null,c.args)}catch(a){return g(b,a)}return a(b,"Executed",void 0)}function g(b,c){return!0===b.isTopLevel&&setTimeout(function(){throw c}),a(b,"Failed",c)}function h(a,b,c){var d=a.shift();return void 0===d?void(b&&b()):"WaitingOnDeps"===d.state?(!1,void h(a,b,c)):void i(d,function(){h(a,b,c)},c)}function i(a,b,c){switch(a.state){case"WaitingForTurn":return e(a),void i(a,b,c);case"Failed":return void(c&&c(a.stateData));case"Executed":return void b();case"Loading":case"WaitingOnDeps":return void a.onNextStateChange.push(function(){return i(a,b,c)});case"Initialized":throw new Error("All dependencies should be loading already before pressureDependencyToExecute is called.");default:throw new Error("Impossible module state: "+a.state);}}function j(a,b){switch(a.state){case"Executed":case"Failed":return void b();default:a.onNextStateChange.push(function(){return j(a,b)});}}function k(a,b){void 0===b&&(b="anonymous");var c=q[a];return void 0===c&&(c=q[a]={url:a,urlBase:m(a),exports:Object.create(null),state:"Initialized",stateData:void 0,isTopLevel:!1,crossorigin:b,onNextStateChange:[]}),c}function l(a){return v.href=a,v.href}function m(a){return a=a.split("?")[0],a=a.split("#")[0],a.substring(0,a.lastIndexOf("/")+1)}function n(a,b){return-1===b.indexOf("://")?l("/"===b[0]?b:a+b):b}function o(){return document.baseURI||(document.querySelector("base")||window.location).href}function p(){var b=document.currentScript;if(!b)return u;if(window.HTMLImports){var c=window.HTMLImports.importForElement(b);return c?c.href:u}var d=b.ownerDocument.createElement("a");return d.href="",d.href}if(!window.define){var q=Object.create(null),r=void 0,s=0,t=void 0,u=o();window.define=function(a,b){var d=!1;r=function(){return d=!0,r=void 0,[a,b]};var f=p(),g=document.currentScript&&document.currentScript.getAttribute("crossorigin")||"anonymous";setTimeout(function(){if(!1==d){r=void 0;var h=f+"#"+s++,i=k(h,g);i.isTopLevel=!0;var l=c(i,a,b);void 0===t?e(l):j(k(t),function(){e(l)}),t=h}},0)},window.define._reset=function(){for(var a in q)delete q[a];r=void 0,s=0,t=void 0,u=o()};var v=document.createElement("a")}})();</script>
 <script>define(["./lib.js"], function (_lib) {
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diff --git a/packages/polyserve/test/bower_components/test-modules/golden/test-suite-wct.html b/packages/polyserve/test/bower_components/test-modules/golden/test-suite-wct.html
index 4ccc17f46..adc1dc5d2 100644
--- a/packages/polyserve/test/bower_components/test-modules/golden/test-suite-wct.html
+++ b/packages/polyserve/test/bower_components/test-modules/golden/test-suite-wct.html
@@ -22,7 +22,7 @@
 </head>
 
 <body>
-  <script>"use strict";(function(){function a(a,b,c){var d=a;if(d.state=b,d.stateData=c,0<d.onNextStateChange.length){var e=d.onNextStateChange.slice();d.onNextStateChange.length=0;for(var f,g=0,h=e;g<h.length;g++)f=h[g],f()}return d}function b(b){function d(){try{document.head.removeChild(f)}catch(a){}}var e=a(b,"Loading",void 0),f=document.createElement("script");return f.src=b.url,f.onload=function(){var a,b,f;void 0===r?(b=[],f=void 0):(a=r(),b=a[0],f=a[1]),c(e,b,f),d()},f.onerror=function(){g(b,new TypeError("Failed to fetch "+b.url)),d()},document.head.appendChild(f),e}function c(b,c,e){var f=d(b,c),g=f[0],h=f[1];return a(b,"WaitingForTurn",{args:g,deps:h,moduleBody:e})}function d(a,c){for(var e,f=[],g=[],i=0,j=c;i<j.length;i++){if(e=j[i],"exports"===e){f.push(a.exports);continue}if("require"===e){f.push(function(b,c,e){var f=d(a,b),g=f[0],i=f[1];h(i,function(){c&&c.apply(null,g)},e)});continue}if("meta"===e){f.push({url:!0===a.isTopLevel?a.url.substring(0,a.url.lastIndexOf("#")):a.url});continue}var l=k(n(a.urlBase,e));f.push(l.exports),g.push(l),"Initialized"===l.state&&b(l)}return[f,g]}function e(b){var c=a(b,"WaitingOnDeps",b.stateData);return h(b.stateData.deps,function(){return f(c)},function(a){return g(c,a)}),c}function f(b){var c=b.stateData;if(null!=c.moduleBody)try{c.moduleBody.apply(null,c.args)}catch(a){return g(b,a)}return a(b,"Executed",void 0)}function g(b,c){return!0===b.isTopLevel&&setTimeout(function(){throw c}),a(b,"Failed",c)}function h(a,b,c){var d=a.shift();return void 0===d?void(b&&b()):"WaitingOnDeps"===d.state?(!1,void h(a,b,c)):void i(d,function(){h(a,b,c)},c)}function i(a,b,c){switch(a.state){case"WaitingForTurn":return e(a),void i(a,b,c);case"Failed":return void(c&&c(a.stateData));case"Executed":return void b();case"Loading":case"WaitingOnDeps":return void a.onNextStateChange.push(function(){return i(a,b,c)});case"Initialized":throw new Error("All dependencies should be loading already before pressureDependencyToExecute is called.");default:throw new Error("Impossible module state: "+a.state);}}function j(a,b){switch(a.state){case"Executed":case"Failed":return void b();default:a.onNextStateChange.push(function(){return j(a,b)});}}function k(a){var b=q[a];return void 0===b&&(b=q[a]={url:a,urlBase:m(a),exports:Object.create(null),state:"Initialized",stateData:void 0,isTopLevel:!1,onNextStateChange:[]}),b}function l(a){return v.href=a,v.href}function m(a){return a=a.split("?")[0],a=a.split("#")[0],a.substring(0,a.lastIndexOf("/")+1)}function n(a,b){return-1===b.indexOf("://")?l("/"===b[0]?b:a+b):b}function o(){return document.baseURI||(document.querySelector("base")||window.location).href}function p(){var b=document.currentScript;if(!b)return u;if(window.HTMLImports){var c=window.HTMLImports.importForElement(b);return c?c.href:u}var d=b.ownerDocument.createElement("a");return d.href="",d.href}if(!window.define){var q=Object.create(null),r=void 0,s=0,t=void 0,u=o();window.define=function(a,b){var d=!1;r=function(){return d=!0,r=void 0,[a,b]};var f=p();setTimeout(function(){if(!1==d){r=void 0;var g=f+"#"+s++,h=k(g);h.isTopLevel=!0;var i=c(h,a,b);void 0===t?e(i):j(k(t),function(){e(i)}),t=g}},0)},window.define._reset=function(){for(var a in q)delete q[a];r=void 0,s=0,t=void 0,u=o()};var v=document.createElement("a")}})();</script>
+  <script>"use strict";(function(){function a(a,b,c){var d=a;if(d.state=b,d.stateData=c,0<d.onNextStateChange.length){var e=d.onNextStateChange.slice();d.onNextStateChange.length=0;for(var f,g=0,h=e;g<h.length;g++)f=h[g],f()}return d}function b(b){function d(){try{document.head.removeChild(f)}catch(a){}}var e=a(b,"Loading",void 0),f=document.createElement("script");return f.src=b.url,null!==b.crossorigin&&f.setAttribute("crossorigin",b.crossorigin),f.onload=function(){var a,b,f;void 0===r?(b=[],f=void 0):(a=r(),b=a[0],f=a[1]),c(e,b,f),d()},f.onerror=function(){g(b,new TypeError("Failed to fetch "+b.url)),d()},document.head.appendChild(f),e}function c(b,c,e){var f=d(b,c),g=f[0],h=f[1];return a(b,"WaitingForTurn",{args:g,deps:h,moduleBody:e})}function d(a,c){for(var e,f=[],g=[],i=0,j=c;i<j.length;i++){if(e=j[i],"exports"===e){f.push(a.exports);continue}if("require"===e){f.push(function(b,c,e){var f=d(a,b),g=f[0],i=f[1];h(i,function(){c&&c.apply(null,g)},e)});continue}if("meta"===e){f.push({url:!0===a.isTopLevel?a.url.substring(0,a.url.lastIndexOf("#")):a.url});continue}var l=k(n(a.urlBase,e),a.crossorigin);f.push(l.exports),g.push(l),"Initialized"===l.state&&b(l)}return[f,g]}function e(b){var c=a(b,"WaitingOnDeps",b.stateData);return h(b.stateData.deps,function(){return f(c)},function(a){return g(c,a)}),c}function f(b){var c=b.stateData;if(null!=c.moduleBody)try{c.moduleBody.apply(null,c.args)}catch(a){return g(b,a)}return a(b,"Executed",void 0)}function g(b,c){return!0===b.isTopLevel&&setTimeout(function(){throw c}),a(b,"Failed",c)}function h(a,b,c){var d=a.shift();return void 0===d?void(b&&b()):"WaitingOnDeps"===d.state?(!1,void h(a,b,c)):void i(d,function(){h(a,b,c)},c)}function i(a,b,c){switch(a.state){case"WaitingForTurn":return e(a),void i(a,b,c);case"Failed":return void(c&&c(a.stateData));case"Executed":return void b();case"Loading":case"WaitingOnDeps":return void a.onNextStateChange.push(function(){return i(a,b,c)});case"Initialized":throw new Error("All dependencies should be loading already before pressureDependencyToExecute is called.");default:throw new Error("Impossible module state: "+a.state);}}function j(a,b){switch(a.state){case"Executed":case"Failed":return void b();default:a.onNextStateChange.push(function(){return j(a,b)});}}function k(a,b){void 0===b&&(b="anonymous");var c=q[a];return void 0===c&&(c=q[a]={url:a,urlBase:m(a),exports:Object.create(null),state:"Initialized",stateData:void 0,isTopLevel:!1,crossorigin:b,onNextStateChange:[]}),c}function l(a){return v.href=a,v.href}function m(a){return a=a.split("?")[0],a=a.split("#")[0],a.substring(0,a.lastIndexOf("/")+1)}function n(a,b){return-1===b.indexOf("://")?l("/"===b[0]?b:a+b):b}function o(){return document.baseURI||(document.querySelector("base")||window.location).href}function p(){var b=document.currentScript;if(!b)return u;if(window.HTMLImports){var c=window.HTMLImports.importForElement(b);return c?c.href:u}var d=b.ownerDocument.createElement("a");return d.href="",d.href}if(!window.define){var q=Object.create(null),r=void 0,s=0,t=void 0,u=o();window.define=function(a,b){var d=!1;r=function(){return d=!0,r=void 0,[a,b]};var f=p(),g=document.currentScript&&document.currentScript.getAttribute("crossorigin")||"anonymous";setTimeout(function(){if(!1==d){r=void 0;var h=f+"#"+s++,i=k(h,g);i.isTopLevel=!0;var l=c(i,a,b);void 0===t?e(l):j(k(t),function(){e(l)}),t=h}},0)},window.define._reset=function(){for(var a in q)delete q[a];r=void 0,s=0,t=void 0,u=o()};var v=document.createElement("a")}})();</script>
 <script>
   // Injected by polymer-build to defer WCT until all AMD modules are loaded.
   (function() {
