diff --git a/docs/index.bs b/docs/index.bs
index 923d6889..3c1887e8 100644
--- a/docs/index.bs
+++ b/docs/index.bs
@@ -202,7 +202,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
 
     A [=/service worker registration=] has an associated <dfn export id="dfn-last-update-check-time">last update check time</dfn>. It is initially set to null.
 
-    A [=/service worker registration=] has an associated <dfn export id="dfn-use-cache">use cache</dfn> (a boolean). It is initially set to false.
+    A [=/service worker registration=] has an associated <dfn export id="dfn-update-via-cache">update via cache mode</dfn>, which is "`imports`", "`all`", or "`none`". It is initially set to "`imports`".
 
     A [=/service worker registration=] has an associated <dfn export id="dfn-uninstalling-flag">uninstalling flag</dfn>. It is initially unset.
 
@@ -412,7 +412,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
         [SameObject] readonly attribute NavigationPreloadManager navigationPreload;
 
         readonly attribute USVString scope;
-        readonly attribute boolean useCache;
+        readonly attribute ServiceWorkerUpdateViaCache updateViaCache;
 
         [NewObject] Promise&lt;void&gt; update();
         [NewObject] Promise&lt;boolean&gt; unregister();
@@ -420,6 +420,12 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
         // event
         attribute EventHandler onupdatefound;
       };
+
+      enum ServiceWorkerUpdateViaCache {
+        "imports",
+        "all",
+        "none"
+      };
     </pre>
 
     A {{ServiceWorkerRegistration}} object represents a [=/service worker registration=]. Each {{ServiceWorkerRegistration}} object is associated with a <dfn for="ServiceWorkerRegistration">service worker registration</dfn> (a [=/service worker registration=]). Multiple separate objects implementing the {{ServiceWorkerRegistration}} interface across documents and workers can all be associated with the same [=/service worker registration=] simultaneously.
@@ -464,10 +470,10 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       </div>
     </section>
 
-    <section algorithm="service-worker-registration-usecache">
-      <h4 id="service-worker-registration-usecache">{{ServiceWorkerRegistration/useCache}}</h4>
+    <section algorithm="service-worker-registration-updateviacache">
+      <h4 id="service-worker-registration-updateviacache">{{ServiceWorkerRegistration/updateViaCache}}</h4>
 
-      The <dfn attribute for="ServiceWorkerRegistration"><code>useCache</code></dfn> attribute *must* return [=ServiceWorkerRegistration/service worker registration=]'s [=service worker registration/use cache=].
+      The <dfn attribute for="ServiceWorkerRegistration"><code>updateViaCache</code></dfn> attribute *must* return [=ServiceWorkerRegistration/service worker registration=]'s [=service worker registration/update via cache mode=].
     </section>
 
     <section algorithm="service-worker-registration-update">
@@ -564,7 +570,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       dictionary RegistrationOptions {
         USVString scope;
         WorkerType type = "classic";
-        boolean useCache = false;
+        ServiceWorkerUpdateViaCache updateViaCache = "imports";
       };
     </pre>
 
@@ -624,7 +630,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
         1. Let |scriptURL| be the result of <a lt="URL parser">parsing</a> |scriptURL| with the <a>context object</a>'s <a>relevant settings object</a>'s <a>API base URL</a>.
         1. Let |scopeURL| be null.
         1. If |options|.{{RegistrationOptions/scope}} is <a>present</a>, set |scopeURL| to the result of <a lt="URL parser">parsing</a> |options|.{{RegistrationOptions/scope}} with the <a>context object</a>'s <a>relevant settings object</a>'s <a>API base URL</a>.
-        1. Invoke [=Start Register=] with |scopeURL|, |scriptURL|, |p|, |client|, |client|'s <a>creation URL</a>, |options|.{{RegistrationOptions/type}}, and |options|.{{RegistrationOptions/useCache}}.
+        1. Invoke [=Start Register=] with |scopeURL|, |scriptURL|, |p|, |client|, |client|'s <a>creation URL</a>, |options|.{{RegistrationOptions/type}}, and |options|.{{RegistrationOptions/updateViaCache}}.
         1. Return |p|.
     </section>
 
@@ -1782,14 +1788,14 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       1. If the "<code>scope</code>" <a>target attribute</a> of the <code>Link</code> header is present, set |scopeURL| to the result of <a lt="URL parser">parsing</a> the "<code>scope</code>" <a>target attribute</a> with |scriptURL|.
       1. Let |workerType| be the "<code>workertype</code>" <a>target attribute</a> of the <code>Link</code> header, or "<code>classic</code>" if no such attribute is present.
       1. If |workerType| is not a valid {{WorkerType}} value, abort these steps.
-      1. Let |useCache| be true if the <code>Link</code> header has a <a>target attribute</a> named "<code>usecache</code>", otherwise false.
-      1. Invoke [=Start Register=] with |scopeURL|, |scriptURL|, a new <a>promise</a>, null, |contextURL|, |workerType|, and |useCache|.
+      1. Let |updateViaCache| be the "`updateviacache`" [=target attribute=] of the `Link` header, or "`imports`" if no such attribute is present.
+      1. Invoke [=Start Register=] with |scopeURL|, |scriptURL|, a new <a>promise</a>, null, |contextURL|, |workerType|, and |updateViaCache|.
   </section>
 
   <section>
     <h3 id="link-element-processing">Processing the <{link}> element</h3>
 
-    When a <a>serviceworker link</a>'s <{link}> element is <a>inserted into a document</a>, or a <a>serviceworker link</a> is created on a <{link}> element that is already <a>in a document tree</a>, or the <{link/href}> or <{link/scope}> attributes of the <{link}> element of a <a>serviceworker link</a> is changed, the user agent *should* run these steps:
+    When a <a>serviceworker link</a>'s <{link}> element is <a>inserted into a document</a>, or a <a>serviceworker link</a> is created on a <{link}> element that is already <a>in a document tree</a>, or the <{link/href}>, <{link/scope}>, or <{link/updateviacache}> attributes of the <{link}> element of a <a>serviceworker link</a> is changed, the user agent *should* run these steps:
 
       1. If the <{link/href}> attribute is the empty string, abort these steps.
       1. Let |client| be the document's [=ServiceWorkerContainer/service worker client=].
@@ -1799,9 +1805,9 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       1. If the <{link/scope}> attribute is present, set |scopeURL| to the result of <a lt="URL parser">parsing</a> the <{link/scope}> attribute with the <{link}> element's <a>node document</a>'s <a>document base URL</a>.
       1. Let |workerType| be the <{link/workertype}> attribute, or "<code>classic</code>" if the <{link/workertype}> attribute is omitted.
       1. If |workerType| is not a valid {{WorkerType}} value, <a>queue a task</a> to <a>fire an event</a> named <code>error</code> at the <{link}> element, and abort these steps.
-      1. Let |useCache| be true if the <{link}> element has a <{link/usecache}> attribute, otherwise false.
+      1. Let |updateViaCache| be the <{link/updateviacache}> attribute, or "`imports`" if the <{link/updateviacache}> attribute is omitted.
       1. Let |promise| be a new <a>promise</a>.
-      1. Invoke [=Start Register=] with |scopeURL|, |scriptURL|, |promise|, |client|, |client|'s <a>creation URL</a>, |workerType|, and |useCache|.
+      1. Invoke [=Start Register=] with |scopeURL|, |scriptURL|, |promise|, |client|, |client|'s <a>creation URL</a>, |workerType|, and |updateViaCache|.
       1. Run the following substeps <a>in parallel</a>:
           1. Wait until |promise| settles.
           1. If |promise| rejected, <a>queue a task</a> to <a>fire an event</a> named <code>error</code> at the <{link}> element.
@@ -1838,7 +1844,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       partial interface HTMLLinkElement {
         [CEReactions] attribute USVString scope;
         [CEReactions] attribute WorkerType workerType;
-        [CEReactions] attribute boolean useCache;
+        [CEReactions] attribute ServiceWorkerUpdateViaCache updateViaCache;
       };
     </pre>
 
@@ -1846,7 +1852,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
 
     The <dfn attribute for="HTMLLinkElement" id="link-workertype-attribute">workerType</dfn> IDL attribute must <a>reflect</a> the element's <dfn element-attr for="link">workertype</dfn> content attribute.
 
-    The <dfn attribute for="HTMLLinkElement" id="link-usecache-attribute">useCache</dfn> IDL attribute must <a>reflect</a> the element's <dfn element-attr for="link">usecache</dfn> content attribute.
+    The <dfn attribute for="HTMLLinkElement" id="link-updateviacache-attribute">updateViaCache</dfn> IDL attribute must <a>reflect</a> the element's <dfn element-attr for="link">updateViaCache</dfn> content attribute.
   </section>
 </section>
 
@@ -2297,7 +2303,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
             1. Let |registration| be |serviceWorker|'s [=containing service worker registration=].
             1. Set |request|'s [=service-workers mode=] to "`foreign`".
             1. Set |request|'s [=request/cache mode=] to "<code>no-cache</code>" if any of the following are true:
-                * |registration|'s [=service worker registration/use cache=] is false.
+                * |registration|'s [=service worker registration/update via cache mode=] is "`none`".
                 * The [=current global object=]'s [=force bypass cache for importscripts flag=] is set.
                 * |registration|'s [=last update check time=] is not null and the time difference in seconds calculated by the current time minus |registration|’s [=last update check time=] is greater than 86400.
             1. Let |response| be the result of <a lt="fetch">fetching</a> |request|.
@@ -2413,7 +2419,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
 
     A <a>job</a> has a <dfn id="dfn-job-worker-type">worker type</dfn> ("<code>classic</code>" or "<code>module</code>").
 
-    A <a>job</a> has a <dfn id="dfn-job-use-cache">use cache</dfn> (a boolean).
+    A <a>job</a> has an <dfn id="dfn-job-update-via-cache-mode">update via cache mode</dfn>, which is "`imports`", "`all`", or "`none`".
 
     A <a>job</a> has a <dfn id="dfn-job-client">client</dfn> (a [=/service worker client=]). It is initially null.
 
@@ -2542,7 +2548,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       :: |client|, a [=/service worker client=]
       :: |referrer|, a [=/URL=]
       :: |workerType|, a <a>worker type</a>
-      :: |useCache|, a boolean
+      :: |updateViaCache|, an [=service worker registration/update via cache mode=]
       : Output
       :: none
 
@@ -2558,7 +2564,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       1. If any of the strings in |scopeURL|'s [=url/path=] contains either <a>ASCII case-insensitive</a> "<code>%2f</code>" or <a>ASCII case-insensitive</a> "<code>%5c</code>", reject |promise| with a <code>TypeError</code> and abort these steps.
       1. Let |job| be the result of running [=Create Job=] with *register*, |scopeURL|, |scriptURL|, |promise|, and |client|.
       1. Set |job|'s [=job/worker type=] to |workerType|.
-      1. Set |job|'s [=job/use cache=] to |useCache|.
+      1. Set |job|'s [=job/update via cache mode=] to |updateViaCache|.
       1. Set |job|'s [=job/referrer=] to |referrer|.
       1. Invoke [=Schedule Job=] with |job|.
   </section>
@@ -2584,11 +2590,11 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       1. If |registration| is not null, then:
           1. If |registration|'s <a>uninstalling flag</a> is set, unset it.
           1. Let |newestWorker| be the result of running the <a>Get Newest Worker</a> algorithm passing |registration| as the argument.
-          1. If |newestWorker| is not null, |job|'s [=job/script url=] [=url/equals=] |newestWorker|'s [=service worker/script url=] with the *exclude fragments flag* set, and |job|'s [=job/use cache=]'s value equals |registration|'s [=service worker registration/use cache=]'s value, then:
+          1. If |newestWorker| is not null, |job|'s [=job/script url=] [=url/equals=] |newestWorker|'s [=service worker/script url=] with the *exclude fragments flag* set, and |job|'s [=job/update via cache mode=]'s value equals |registration|'s [=service worker registration/update via cache mode=], then:
               1. Invoke <a>Resolve Job Promise</a> with |job| and the {{ServiceWorkerRegistration}} object which represents |registration|.
               1. Invoke <a>Finish Job</a> with |job| and abort these steps.
       1. Else:
-          1. Invoke <a>Set Registration</a> algorithm with |job|'s [=job/scope url=] and |job|'s [=job/use cache=].
+          1. Invoke <a>Set Registration</a> algorithm with |job|'s [=job/scope url=] and |job|'s [=job/update via cache mode=].
       1. Invoke <a>Update</a> algorithm passing |job| as the argument.
   </section>
 
@@ -2624,7 +2630,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
             Note: See the definition of the Service-Worker header in Appendix B: Extended HTTP headers.
 
           1. Set |request|'s [=request/cache mode=] to "<code>no-cache</code>" if any of the following are true:
-              * |registration|'s [=service worker registration/use cache=] is false.
+              * |registration|'s [=service worker registration/update via cache mode=] is not "`all`".
               * |job|'s [=force bypass cache flag=] is set.
               * |newestWorker| is not null, and |registration|'s [=last update check time=] is not null and the time difference in seconds calculated by the current time minus |registration|’s [=last update check time=] is greater than 86400.
 
@@ -3192,13 +3198,13 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
 
       : Input
       :: |scope|, a [=/URL=]
-      :: |useCache|, a boolean
+      :: |updateViaCache|, an [=service worker registration/update via cache mode=]
       : Output
       :: |registration|, a [=/service worker registration=]
 
       1. Run the following steps atomically.
       1. Let |scopeString| be <a lt="URL serializer">serialized</a> |scope| with the *exclude fragment flag* set.
-      1. Let |registration| be a new [=/service worker registration=] whose [=service worker registration/scope url=] is set to |scope| and [=service worker registration/use cache=] is set to |useCache|.
+      1. Let |registration| be a new [=/service worker registration=] whose [=service worker registration/scope url=] is set to |scope| and [=service worker registration/update via cache mode=] is set to |updateViaCache|.
       1. [=map/Set=] <a>scope to registration map</a>[|scopeString|] to |registration|.
       1. Return |registration|.
   </section>
diff --git a/docs/index.html b/docs/index.html
index c86dd0d5..72eabea9 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -1177,7 +1177,7 @@
 		}
 	}
 </style>
-  <meta content="Bikeshed version 5eac41affc3976771f238ed8f80db1c877b65b40" name="generator">
+  <meta content="Bikeshed version 34209db86579ed3f0e75afb470f2788a2646155f" name="generator">
   <link href="https://www.w3.org/TR/service-workers/" rel="canonical">
 <style>/* style-md-lists */
 
@@ -1425,7 +1425,7 @@
   <div class="head">
    <p data-fill-with="logo"><a class="logo" href="https://www.w3.org/"> <img alt="W3C" height="48" src="https://www.w3.org/StyleSheets/TR/2016/logos/W3C" width="72"> </a> </p>
    <h1 class="p-name no-ref" id="title">Service Workers Nightly</h1>
-   <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Editor’s Draft, <time class="dt-updated" datetime="2017-05-30">30 May 2017</time></span></h2>
+   <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Editor’s Draft, <time class="dt-updated" datetime="2017-06-05">5 June 2017</time></span></h2>
    <div data-fill-with="spec-metadata">
     <dl>
      <dt>This version:
@@ -1515,7 +1515,7 @@ <h2 class="no-num no-toc no-ref" id="contents">Table of Contents</h2>
         <li><a href="#navigator-service-worker-active"><span class="secno">3.2.3</span> <span class="content"><code class="idl"><span>active</span></code></span></a>
         <li><a href="#service-worker-registration-navigationpreload"><span class="secno">3.2.4</span> <span class="content"><code class="idl"><span>navigationPreload</span></code></span></a>
         <li><a href="#service-worker-registration-scope"><span class="secno">3.2.5</span> <span class="content"><code class="idl"><span>scope</span></code></span></a>
-        <li><a href="#service-worker-registration-usecache"><span class="secno">3.2.6</span> <span class="content"><code class="idl"><span>useCache</span></code></span></a>
+        <li><a href="#service-worker-registration-updateviacache"><span class="secno">3.2.6</span> <span class="content"><code class="idl"><span>updateViaCache</span></code></span></a>
         <li><a href="#service-worker-registration-update"><span class="secno">3.2.7</span> <span class="content"><code class="idl"><span>update()</span></code></span></a>
         <li><a href="#navigator-service-worker-unregister"><span class="secno">3.2.8</span> <span class="content"><code class="idl"><span>unregister()</span></code></span></a>
         <li><a href="#service-worker-registration-event-handler"><span class="secno">3.2.9</span> <span class="content">Event handler</span></a>
@@ -1799,7 +1799,7 @@ <h3 class="heading settled" data-level="2.2" id="service-worker-registration-con
      <p>A <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-8">service worker registration</a> has an associated <dfn class="dfn-paneled" data-dfn-for="service worker registration" data-dfn-type="dfn" data-export="" id="dfn-waiting-worker">waiting worker</dfn> (a <a data-link-type="dfn" href="#dfn-service-worker" id="ref-for-dfn-service-worker-35">service worker</a> or null) whose <a data-link-type="dfn" href="#dfn-state" id="ref-for-dfn-state-2">state</a> is <em>installed</em>. It is initially set to null.</p>
      <p>A <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-9">service worker registration</a> has an associated <dfn class="dfn-paneled" data-dfn-for="service worker registration" data-dfn-type="dfn" data-export="" id="dfn-active-worker">active worker</dfn> (a <a data-link-type="dfn" href="#dfn-service-worker" id="ref-for-dfn-service-worker-36">service worker</a> or null) whose <a data-link-type="dfn" href="#dfn-state" id="ref-for-dfn-state-3">state</a> is either <em>activating</em> or <em>activated</em>. It is initially set to null.</p>
      <p>A <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-10">service worker registration</a> has an associated <dfn class="dfn-paneled" data-dfn-for="service worker registration" data-dfn-type="dfn" data-export="" id="dfn-last-update-check-time">last update check time</dfn>. It is initially set to null.</p>
-     <p>A <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-11">service worker registration</a> has an associated <dfn class="dfn-paneled" data-dfn-for="service worker registration" data-dfn-type="dfn" data-export="" id="dfn-use-cache">use cache</dfn> (a boolean). It is initially set to false.</p>
+     <p>A <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-11">service worker registration</a> has an associated <dfn class="dfn-paneled" data-dfn-for="service worker registration" data-dfn-type="dfn" data-export="" id="dfn-update-via-cache">update via cache mode</dfn>, which is "<code>imports</code>", "<code>all</code>", or "<code>none</code>". It is initially set to "<code>imports</code>".</p>
      <p>A <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-12">service worker registration</a> has an associated <dfn class="dfn-paneled" data-dfn-for="service worker registration" data-dfn-type="dfn" data-export="" id="dfn-uninstalling-flag">uninstalling flag</dfn>. It is initially unset.</p>
      <p>A <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-13">service worker registration</a> has one or more <dfn class="dfn-paneled" data-dfn-for="service worker registration" data-dfn-type="dfn" data-export="" id="dfn-service-worker-registration-task-queue">task queues</dfn> that back up the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#concept-task">tasks</a> from its <a data-link-type="dfn" href="#dfn-active-worker" id="ref-for-dfn-active-worker-2">active worker</a>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#event-loop">event loop</a>’s corresponding <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#task-queue">task queues</a>. (The target task sources for this back up operation are the <a data-link-type="dfn" href="#dfn-handle-fetch-task-source" id="ref-for-dfn-handle-fetch-task-source-1">handle fetch task source</a> and the <a data-link-type="dfn" href="#dfn-handle-functional-event-task-source" id="ref-for-dfn-handle-functional-event-task-source-1">handle functional event task source</a>.) The user agent dumps the <a data-link-type="dfn" href="#dfn-active-worker" id="ref-for-dfn-active-worker-3">active worker</a>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#concept-task">tasks</a> to the <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-14">service worker registration</a>'s <a data-link-type="dfn" href="#dfn-service-worker-registration-task-queue" id="ref-for-dfn-service-worker-registration-task-queue-1">task queues</a> when the <a data-link-type="dfn" href="#dfn-active-worker" id="ref-for-dfn-active-worker-4">active worker</a> is <a data-link-type="dfn" href="#terminate-service-worker" id="ref-for-terminate-service-worker-2">terminated</a> and <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#queue-a-task">re-queues those tasks</a> to the <a data-link-type="dfn" href="#dfn-active-worker" id="ref-for-dfn-active-worker-5">active worker</a>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#event-loop">event loop</a>’s corresponding <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#task-queue">task queues</a> when the <a data-link-type="dfn" href="#dfn-active-worker" id="ref-for-dfn-active-worker-6">active worker</a> spins off. Unlike the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#task-queue">task queues</a> owned by <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#event-loop">event loops</a>, the <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-15">service worker registration</a>'s <a data-link-type="dfn" href="#dfn-service-worker-registration-task-queue" id="ref-for-dfn-service-worker-registration-task-queue-2">task queues</a> are not processed by any <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#event-loop">event loops</a> in and of itself.</p>
      <p>A <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-16">service worker registration</a> has an associated <dfn data-dfn-for="service worker registration" data-dfn-type="dfn" data-export="" id="service-worker-registration-navigationpreloadmanager"><code class="idl"><a data-link-type="idl" href="#navigationpreloadmanager" id="ref-for-navigationpreloadmanager-1">NavigationPreloadManager</a></code><a class="self-link" href="#service-worker-registration-navigationpreloadmanager"></a></dfn> object.</p>
@@ -1977,7 +1977,7 @@ <h3 class="heading settled" data-level="3.2" id="serviceworkerregistration-inter
   [<a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#SameObject">SameObject</a>] <span class="kt">readonly</span> <span class="kt">attribute</span> <a class="n" data-link-type="idl-name" href="#navigationpreloadmanager" id="ref-for-navigationpreloadmanager-2">NavigationPreloadManager</a> <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="NavigationPreloadManager" href="#dom-serviceworkerregistration-navigationpreload" id="ref-for-dom-serviceworkerregistration-navigationpreload-1">navigationPreload</a>;
 
   <span class="kt">readonly</span> <span class="kt">attribute</span> <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-USVString"><span class="kt">USVString</span></a> <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="USVString" href="#dom-serviceworkerregistration-scope" id="ref-for-dom-serviceworkerregistration-scope-1">scope</a>;
-  <span class="kt">readonly</span> <span class="kt">attribute</span> <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-boolean"><span class="kt">boolean</span></a> <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="boolean" href="#dom-serviceworkerregistration-usecache" id="ref-for-dom-serviceworkerregistration-usecache-1">useCache</a>;
+  <span class="kt">readonly</span> <span class="kt">attribute</span> <a class="n" data-link-type="idl-name" href="#enumdef-serviceworkerupdateviacache" id="ref-for-enumdef-serviceworkerupdateviacache-1">ServiceWorkerUpdateViaCache</a> <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="ServiceWorkerUpdateViaCache" href="#dom-serviceworkerregistration-updateviacache" id="ref-for-dom-serviceworkerregistration-updateviacache-1">updateViaCache</a>;
 
   [<a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#NewObject">NewObject</a>] <span class="kt">Promise</span>&lt;<span class="kt">void</span>> <a class="nv idl-code" data-link-type="method" href="#dom-serviceworkerregistration-update" id="ref-for-dom-serviceworkerregistration-update-1">update</a>();
   [<a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#NewObject">NewObject</a>] <span class="kt">Promise</span>&lt;<a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-boolean"><span class="kt">boolean</span></a>> <a class="nv idl-code" data-link-type="method" href="#dom-serviceworkerregistration-unregister" id="ref-for-dom-serviceworkerregistration-unregister-1">unregister</a>();
@@ -1985,6 +1985,12 @@ <h3 class="heading settled" data-level="3.2" id="serviceworkerregistration-inter
   // event
   <span class="kt">attribute</span> <a class="n" data-link-type="idl-name" href="https://html.spec.whatwg.org/multipage/webappapis.html#eventhandler">EventHandler</a> <a class="nv idl-code" data-link-type="attribute" data-type="EventHandler" href="#dom-serviceworkerregistration-onupdatefound" id="ref-for-dom-serviceworkerregistration-onupdatefound-1">onupdatefound</a>;
 };
+
+<span class="kt">enum</span> <dfn class="nv dfn-paneled idl-code" data-dfn-type="enum" data-export="" id="enumdef-serviceworkerupdateviacache"><code>ServiceWorkerUpdateViaCache</code></dfn> {
+  <dfn class="s idl-code" data-dfn-for="ServiceWorkerUpdateViaCache" data-dfn-type="enum-value" data-export="" data-lt="&quot;imports&quot;|imports" id="dom-serviceworkerupdateviacache-imports"><code>"imports"</code><a class="self-link" href="#dom-serviceworkerupdateviacache-imports"></a></dfn>,
+  <dfn class="s idl-code" data-dfn-for="ServiceWorkerUpdateViaCache" data-dfn-type="enum-value" data-export="" data-lt="&quot;all&quot;|all" id="dom-serviceworkerupdateviacache-all"><code>"all"</code><a class="self-link" href="#dom-serviceworkerupdateviacache-all"></a></dfn>,
+  <dfn class="s idl-code" data-dfn-for="ServiceWorkerUpdateViaCache" data-dfn-type="enum-value" data-export="" data-lt="&quot;none&quot;|none" id="dom-serviceworkerupdateviacache-none"><code>"none"</code><a class="self-link" href="#dom-serviceworkerupdateviacache-none"></a></dfn>
+};
 </pre>
      <p>A <code class="idl"><a data-link-type="idl" href="#serviceworkerregistration" id="ref-for-serviceworkerregistration-3">ServiceWorkerRegistration</a></code> object represents a <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-34">service worker registration</a>. Each <code class="idl"><a data-link-type="idl" href="#serviceworkerregistration" id="ref-for-serviceworkerregistration-4">ServiceWorkerRegistration</a></code> object is associated with a <dfn class="dfn-paneled" data-dfn-for="ServiceWorkerRegistration" data-dfn-type="dfn" data-noexport="" id="serviceworkerregistration-service-worker-registration">service worker registration</dfn> (a <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-35">service worker registration</a>). Multiple separate objects implementing the <code class="idl"><a data-link-type="idl" href="#serviceworkerregistration" id="ref-for-serviceworkerregistration-5">ServiceWorkerRegistration</a></code> interface across documents and workers can all be associated with the same <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-36">service worker registration</a> simultaneously.</p>
      <section class="algorithm" data-algorithm="navigator-service-worker-installing">
@@ -2011,9 +2017,9 @@ <h4 class="heading settled" data-level="3.2.5" id="service-worker-registration-s
       <p>The <dfn class="dfn-paneled idl-code" data-dfn-for="ServiceWorkerRegistration" data-dfn-type="attribute" data-export="" id="dom-serviceworkerregistration-scope"><code><code>scope</code></code></dfn> attribute <em>must</em> return <a data-link-type="dfn" href="#serviceworkerregistration-service-worker-registration" id="ref-for-serviceworkerregistration-service-worker-registration-2">service worker registration</a>'s <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url-serializer">serialized</a> <a data-link-type="dfn" href="#dfn-scope-url" id="ref-for-dfn-scope-url-6">scope url</a>.</p>
       <div class="example" id="example-2dbb4b8b"><a class="self-link" href="#example-2dbb4b8b"></a> In the example in <a href="#service-worker-url">§3.1.1 scriptURL</a>, the value of <code>registration.scope</code>, obtained from <code>navigator.serviceWorker.ready.then(registration => console.log(registration.scope))</code> for example, will be "<code>https://example.com/</code>". </div>
      </section>
-     <section class="algorithm" data-algorithm="service-worker-registration-usecache">
-      <h4 class="heading settled" data-level="3.2.6" id="service-worker-registration-usecache"><span class="secno">3.2.6. </span><span class="content"><code class="idl"><a data-link-type="idl" href="#dom-serviceworkerregistration-usecache" id="ref-for-dom-serviceworkerregistration-usecache-2">useCache</a></code></span><a class="self-link" href="#service-worker-registration-usecache"></a></h4>
-      <p>The <dfn class="dfn-paneled idl-code" data-dfn-for="ServiceWorkerRegistration" data-dfn-type="attribute" data-export="" id="dom-serviceworkerregistration-usecache"><code><code>useCache</code></code></dfn> attribute <em>must</em> return <a data-link-type="dfn" href="#serviceworkerregistration-service-worker-registration" id="ref-for-serviceworkerregistration-service-worker-registration-3">service worker registration</a>'s <a data-link-type="dfn" href="#dfn-use-cache" id="ref-for-dfn-use-cache-1">use cache</a>.</p>
+     <section class="algorithm" data-algorithm="service-worker-registration-updateviacache">
+      <h4 class="heading settled" data-level="3.2.6" id="service-worker-registration-updateviacache"><span class="secno">3.2.6. </span><span class="content"><code class="idl"><a data-link-type="idl" href="#dom-serviceworkerregistration-updateviacache" id="ref-for-dom-serviceworkerregistration-updateviacache-2">updateViaCache</a></code></span><a class="self-link" href="#service-worker-registration-updateviacache"></a></h4>
+      <p>The <dfn class="dfn-paneled idl-code" data-dfn-for="ServiceWorkerRegistration" data-dfn-type="attribute" data-export="" id="dom-serviceworkerregistration-updateviacache"><code><code>updateViaCache</code></code></dfn> attribute <em>must</em> return <a data-link-type="dfn" href="#serviceworkerregistration-service-worker-registration" id="ref-for-serviceworkerregistration-service-worker-registration-3">service worker registration</a>'s <a data-link-type="dfn" href="#dfn-update-via-cache" id="ref-for-dfn-update-via-cache-1">update via cache mode</a>.</p>
      </section>
      <section class="algorithm" data-algorithm="service-worker-registration-update">
       <h4 class="heading settled" data-level="3.2.7" id="service-worker-registration-update"><span class="secno">3.2.7. </span><span class="content"><code class="idl"><a data-link-type="idl" href="#dom-serviceworkerregistration-update" id="ref-for-dom-serviceworkerregistration-update-2">update()</a></code></span><a class="self-link" href="#service-worker-registration-update"></a></h4>
@@ -2045,13 +2051,13 @@ <h4 class="heading settled" data-level="3.2.8" id="navigator-service-worker-unre
       <p><dfn class="dfn-paneled idl-code" data-dfn-for="ServiceWorkerRegistration" data-dfn-type="method" data-export="" id="dom-serviceworkerregistration-unregister"><code><code>unregister()</code></code></dfn> method <em>must</em> run these steps:</p>
       <ol>
        <li data-md="">
-        <p>Let <var>p</var> be a <a data-link-type="dfn" href="http://tc39.github.io/ecma262/#sec-promise-objects">promise</a>.</p>
+        <p>Let <var>promise</var> be a <a data-link-type="dfn" href="http://tc39.github.io/ecma262/#sec-promise-objects">promise</a>.</p>
        <li data-md="">
-        <p>Let <var>job</var> be the result of running <a data-link-type="dfn" href="#create-job" id="ref-for-create-job-2">Create Job</a> with <em>unregister</em>, the <a data-link-type="dfn" href="#dfn-scope-url" id="ref-for-dfn-scope-url-8">scope url</a> of the <a data-link-type="dfn" href="#serviceworkerregistration-service-worker-registration" id="ref-for-serviceworkerregistration-service-worker-registration-5">service worker registration</a>, null, <var>p</var>, and the <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#context-object">context object</a>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#relevant-settings-object">relevant settings object</a>.</p>
+        <p>Let <var>job</var> be the result of running <a data-link-type="dfn" href="#create-job" id="ref-for-create-job-2">Create Job</a> with <em>unregister</em>, the <a data-link-type="dfn" href="#dfn-scope-url" id="ref-for-dfn-scope-url-8">scope url</a> of the <a data-link-type="dfn" href="#serviceworkerregistration-service-worker-registration" id="ref-for-serviceworkerregistration-service-worker-registration-5">service worker registration</a>, null, <var>promise</var>, and the <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#context-object">context object</a>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#relevant-settings-object">relevant settings object</a>.</p>
        <li data-md="">
         <p>Invoke <a data-link-type="dfn" href="#schedule-job" id="ref-for-schedule-job-2">Schedule Job</a> with <var>job</var>.</p>
        <li data-md="">
-        <p>Return <var>p</var>.</p>
+        <p>Return <var>promise</var>.</p>
       </ol>
      </section>
      <section>
@@ -2105,7 +2111,7 @@ <h3 class="heading settled" data-level="3.4" id="serviceworkercontainer-interfac
 <pre class="idl highlight def" id="registration-option-list-dictionary"><span class="kt">dictionary</span> <dfn class="nv dfn-paneled idl-code" data-dfn-type="dictionary" data-export="" id="dictdef-registrationoptions"><code>RegistrationOptions</code></dfn> {
   <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-USVString"><span class="kt">USVString</span></a> <dfn class="nv dfn-paneled idl-code" data-dfn-for="RegistrationOptions" data-dfn-type="dict-member" data-export="" data-type="USVString " id="dom-registrationoptions-scope"><code>scope</code></dfn>;
   <a class="n" data-link-type="idl-name" href="https://html.spec.whatwg.org/multipage/workers.html#workertype">WorkerType</a> <dfn class="nv dfn-paneled idl-code" data-default="&quot;classic&quot;" data-dfn-for="RegistrationOptions" data-dfn-type="dict-member" data-export="" data-type="WorkerType " id="dom-registrationoptions-type"><code>type</code></dfn> = "classic";
-  <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-boolean"><span class="kt">boolean</span></a> <dfn class="nv dfn-paneled idl-code" data-default="false" data-dfn-for="RegistrationOptions" data-dfn-type="dict-member" data-export="" data-type="boolean " id="dom-registrationoptions-usecache"><code>useCache</code></dfn> = <span class="kt">false</span>;
+  <a class="n" data-link-type="idl-name" href="#enumdef-serviceworkerupdateviacache" id="ref-for-enumdef-serviceworkerupdateviacache-2">ServiceWorkerUpdateViaCache</a> <dfn class="nv dfn-paneled idl-code" data-default="&quot;imports&quot;" data-dfn-for="RegistrationOptions" data-dfn-type="dict-member" data-export="" data-type="ServiceWorkerUpdateViaCache " id="dom-registrationoptions-updateviacache"><code>updateViaCache</code></dfn> = "imports";
 };
 </pre>
      <p>The user agent <em>must</em> create a <code class="idl"><a data-link-type="idl" href="#serviceworkercontainer" id="ref-for-serviceworkercontainer-5">ServiceWorkerContainer</a></code> object when a <code class="idl"><a data-link-type="idl" href="https://html.spec.whatwg.org/multipage/webappapis.html#navigator">Navigator</a></code> object or a <code class="idl"><a data-link-type="idl" href="https://html.spec.whatwg.org/multipage/workers.html#workernavigator">WorkerNavigator</a></code> object is created and associate it with that object.</p>
@@ -2174,7 +2180,7 @@ <h4 class="heading settled" data-level="3.4.3" id="navigator-service-worker-regi
        <li data-md="">
         <p>If <var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-registrationoptions-scope" id="ref-for-dom-registrationoptions-scope-1">scope</a></code> is <a data-link-type="dfn" href="https://heycam.github.io/webidl/#dfn-present">present</a>, set <var>scopeURL</var> to the result of <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url-parser">parsing</a> <var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-registrationoptions-scope" id="ref-for-dom-registrationoptions-scope-2">scope</a></code> with the <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#context-object">context object</a>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#relevant-settings-object">relevant settings object</a>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#api-base-url">API base URL</a>.</p>
        <li data-md="">
-        <p>Invoke <a data-link-type="dfn" href="#start-register" id="ref-for-start-register-1">Start Register</a> with <var>scopeURL</var>, <var>scriptURL</var>, <var>p</var>, <var>client</var>, <var>client</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#concept-environment-creation-url">creation URL</a>, <var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-registrationoptions-type" id="ref-for-dom-registrationoptions-type-1">type</a></code>, and <var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-registrationoptions-usecache" id="ref-for-dom-registrationoptions-usecache-1">useCache</a></code>.</p>
+        <p>Invoke <a data-link-type="dfn" href="#start-register" id="ref-for-start-register-1">Start Register</a> with <var>scopeURL</var>, <var>scriptURL</var>, <var>p</var>, <var>client</var>, <var>client</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#concept-environment-creation-url">creation URL</a>, <var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-registrationoptions-type" id="ref-for-dom-registrationoptions-type-1">type</a></code>, and <var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-registrationoptions-updateviacache" id="ref-for-dom-registrationoptions-updateviacache-1">updateViaCache</a></code>.</p>
        <li data-md="">
         <p>Return <var>p</var>.</p>
       </ol>
@@ -3659,14 +3665,14 @@ <h3 class="heading settled" data-level="5.1" id="link-header-processing"><span c
       <li data-md="">
        <p>If <var>workerType</var> is not a valid <code class="idl"><a data-link-type="idl" href="https://html.spec.whatwg.org/multipage/workers.html#workertype">WorkerType</a></code> value, abort these steps.</p>
       <li data-md="">
-       <p>Let <var>useCache</var> be true if the <code>Link</code> header has a <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc5988#section-5.4">target attribute</a> named "<code>usecache</code>", otherwise false.</p>
+       <p>Let <var>updateViaCache</var> be the "<code>updateviacache</code>" <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc5988#section-5.4">target attribute</a> of the <code>Link</code> header, or "<code>imports</code>" if no such attribute is present.</p>
       <li data-md="">
-       <p>Invoke <a data-link-type="dfn" href="#start-register" id="ref-for-start-register-2">Start Register</a> with <var>scopeURL</var>, <var>scriptURL</var>, a new <a data-link-type="dfn" href="http://tc39.github.io/ecma262/#sec-promise-objects">promise</a>, null, <var>contextURL</var>, <var>workerType</var>, and <var>useCache</var>.</p>
+       <p>Invoke <a data-link-type="dfn" href="#start-register" id="ref-for-start-register-2">Start Register</a> with <var>scopeURL</var>, <var>scriptURL</var>, a new <a data-link-type="dfn" href="http://tc39.github.io/ecma262/#sec-promise-objects">promise</a>, null, <var>contextURL</var>, <var>workerType</var>, and <var>updateViaCache</var>.</p>
      </ol>
     </section>
     <section>
      <h3 class="heading settled" data-level="5.2" id="link-element-processing"><span class="secno">5.2. </span><span class="content">Processing the <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/semantics.html#the-link-element">link</a></code> element</span><a class="self-link" href="#link-element-processing"></a></h3>
-     <p>When a <a data-link-type="dfn" href="#dfn-serviceworker-link" id="ref-for-dfn-serviceworker-link-2">serviceworker link</a>’s <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/semantics.html#the-link-element">link</a></code> element is <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/infrastructure.html#insert-an-element-into-a-document">inserted into a document</a>, or a <a data-link-type="dfn" href="#dfn-serviceworker-link" id="ref-for-dfn-serviceworker-link-3">serviceworker link</a> is created on a <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/semantics.html#the-link-element">link</a></code> element that is already <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#in-a-document-tree">in a document tree</a>, or the <code><a data-link-type="element-sub" href="https://html.spec.whatwg.org/multipage/semantics.html#attr-link-href">href</a></code> or <code><a data-link-type="element-sub" href="#element-attrdef-link-scope" id="ref-for-element-attrdef-link-scope-1">scope</a></code> attributes of the <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/semantics.html#the-link-element">link</a></code> element of a <a data-link-type="dfn" href="#dfn-serviceworker-link" id="ref-for-dfn-serviceworker-link-4">serviceworker link</a> is changed, the user agent <em>should</em> run these steps:</p>
+     <p>When a <a data-link-type="dfn" href="#dfn-serviceworker-link" id="ref-for-dfn-serviceworker-link-2">serviceworker link</a>’s <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/semantics.html#the-link-element">link</a></code> element is <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/infrastructure.html#insert-an-element-into-a-document">inserted into a document</a>, or a <a data-link-type="dfn" href="#dfn-serviceworker-link" id="ref-for-dfn-serviceworker-link-3">serviceworker link</a> is created on a <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/semantics.html#the-link-element">link</a></code> element that is already <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#in-a-document-tree">in a document tree</a>, or the <code><a data-link-type="element-sub" href="https://html.spec.whatwg.org/multipage/semantics.html#attr-link-href">href</a></code>, <code><a data-link-type="element-sub" href="#element-attrdef-link-scope" id="ref-for-element-attrdef-link-scope-1">scope</a></code>, or <code><a data-link-type="element-sub" href="#element-attrdef-link-updateviacache" id="ref-for-element-attrdef-link-updateviacache-1">updateviacache</a></code> attributes of the <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/semantics.html#the-link-element">link</a></code> element of a <a data-link-type="dfn" href="#dfn-serviceworker-link" id="ref-for-dfn-serviceworker-link-4">serviceworker link</a> is changed, the user agent <em>should</em> run these steps:</p>
      <ol>
       <li data-md="">
        <p>If the <code><a data-link-type="element-sub" href="https://html.spec.whatwg.org/multipage/semantics.html#attr-link-href">href</a></code> attribute is the empty string, abort these steps.</p>
@@ -3685,11 +3691,11 @@ <h3 class="heading settled" data-level="5.2" id="link-element-processing"><span
       <li data-md="">
        <p>If <var>workerType</var> is not a valid <code class="idl"><a data-link-type="idl" href="https://html.spec.whatwg.org/multipage/workers.html#workertype">WorkerType</a></code> value, <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#queue-a-task">queue a task</a> to <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-event-fire">fire an event</a> named <code>error</code> at the <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/semantics.html#the-link-element">link</a></code> element, and abort these steps.</p>
       <li data-md="">
-       <p>Let <var>useCache</var> be true if the <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/semantics.html#the-link-element">link</a></code> element has a <code><a data-link-type="element-sub" href="#element-attrdef-link-usecache" id="ref-for-element-attrdef-link-usecache-1">usecache</a></code> attribute, otherwise false.</p>
+       <p>Let <var>updateViaCache</var> be the <code><a data-link-type="element-sub" href="#element-attrdef-link-updateviacache" id="ref-for-element-attrdef-link-updateviacache-2">updateviacache</a></code> attribute, or "<code>imports</code>" if the <code><a data-link-type="element-sub" href="#element-attrdef-link-updateviacache" id="ref-for-element-attrdef-link-updateviacache-3">updateviacache</a></code> attribute is omitted.</p>
       <li data-md="">
        <p>Let <var>promise</var> be a new <a data-link-type="dfn" href="http://tc39.github.io/ecma262/#sec-promise-objects">promise</a>.</p>
       <li data-md="">
-       <p>Invoke <a data-link-type="dfn" href="#start-register" id="ref-for-start-register-3">Start Register</a> with <var>scopeURL</var>, <var>scriptURL</var>, <var>promise</var>, <var>client</var>, <var>client</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#concept-environment-creation-url">creation URL</a>, <var>workerType</var>, and <var>useCache</var>.</p>
+       <p>Invoke <a data-link-type="dfn" href="#start-register" id="ref-for-start-register-3">Start Register</a> with <var>scopeURL</var>, <var>scriptURL</var>, <var>promise</var>, <var>client</var>, <var>client</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#concept-environment-creation-url">creation URL</a>, <var>workerType</var>, and <var>updateViaCache</var>.</p>
       <li data-md="">
        <p>Run the following substeps <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/infrastructure.html#in-parallel">in parallel</a>:</p>
        <ol>
@@ -3719,12 +3725,12 @@ <h3 class="heading settled" data-level="5.3" id="link-element-interface-extensio
 <pre class="idl highlight def"><span class="kt">partial</span> <span class="kt">interface</span> <a class="nv idl-code" data-link-type="interface" href="https://html.spec.whatwg.org/multipage/semantics.html#htmllinkelement">HTMLLinkElement</a> {
   [<a class="nv idl-code" data-link-type="extended-attribute" href="https://html.spec.whatwg.org/multipage/scripting.html#cereactions">CEReactions</a>] <span class="kt">attribute</span> <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-USVString"><span class="kt">USVString</span></a> <a class="nv idl-code" data-link-type="attribute" data-type="USVString" href="#link-scope-attribute" id="ref-for-link-scope-attribute-1">scope</a>;
   [<a class="nv idl-code" data-link-type="extended-attribute" href="https://html.spec.whatwg.org/multipage/scripting.html#cereactions">CEReactions</a>] <span class="kt">attribute</span> <a class="n" data-link-type="idl-name" href="https://html.spec.whatwg.org/multipage/workers.html#workertype">WorkerType</a> <a class="nv idl-code" data-link-type="attribute" data-type="WorkerType" href="#link-workertype-attribute" id="ref-for-link-workertype-attribute-1">workerType</a>;
-  [<a class="nv idl-code" data-link-type="extended-attribute" href="https://html.spec.whatwg.org/multipage/scripting.html#cereactions">CEReactions</a>] <span class="kt">attribute</span> <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-boolean"><span class="kt">boolean</span></a> <a class="nv idl-code" data-link-type="attribute" data-type="boolean" href="#link-usecache-attribute" id="ref-for-link-usecache-attribute-1">useCache</a>;
+  [<a class="nv idl-code" data-link-type="extended-attribute" href="https://html.spec.whatwg.org/multipage/scripting.html#cereactions">CEReactions</a>] <span class="kt">attribute</span> <a class="n" data-link-type="idl-name" href="#enumdef-serviceworkerupdateviacache" id="ref-for-enumdef-serviceworkerupdateviacache-3">ServiceWorkerUpdateViaCache</a> <a class="nv idl-code" data-link-type="attribute" data-type="ServiceWorkerUpdateViaCache" href="#link-updateviacache-attribute" id="ref-for-link-updateviacache-attribute-1">updateViaCache</a>;
 };
 </pre>
      <p>The <dfn class="dfn-paneled idl-code" data-dfn-for="HTMLLinkElement" data-dfn-type="attribute" data-export="" id="link-scope-attribute"><code>scope</code></dfn> IDL attribute must <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-reflect">reflect</a> the element’s <dfn class="dfn-paneled" data-dfn-for="link" data-dfn-type="element-attr" data-export="" id="element-attrdef-link-scope"><code>scope</code></dfn> content attribute.</p>
      <p>The <dfn class="dfn-paneled idl-code" data-dfn-for="HTMLLinkElement" data-dfn-type="attribute" data-export="" id="link-workertype-attribute"><code>workerType</code></dfn> IDL attribute must <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-reflect">reflect</a> the element’s <dfn class="dfn-paneled" data-dfn-for="link" data-dfn-type="element-attr" data-export="" id="element-attrdef-link-workertype"><code>workertype</code></dfn> content attribute.</p>
-     <p>The <dfn class="dfn-paneled idl-code" data-dfn-for="HTMLLinkElement" data-dfn-type="attribute" data-export="" id="link-usecache-attribute"><code>useCache</code></dfn> IDL attribute must <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-reflect">reflect</a> the element’s <dfn class="dfn-paneled" data-dfn-for="link" data-dfn-type="element-attr" data-export="" id="element-attrdef-link-usecache"><code>usecache</code></dfn> content attribute.</p>
+     <p>The <dfn class="dfn-paneled idl-code" data-dfn-for="HTMLLinkElement" data-dfn-type="attribute" data-export="" id="link-updateviacache-attribute"><code>updateViaCache</code></dfn> IDL attribute must <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-reflect">reflect</a> the element’s <dfn class="dfn-paneled" data-dfn-for="link" data-dfn-type="element-attr" data-export="" id="element-attrdef-link-updateviacache"><code>updateViaCache</code></dfn> content attribute.</p>
     </section>
    </section>
    <section>
@@ -4472,7 +4478,7 @@ <h4 class="heading settled" data-level="7.3.2" id="importscripts"><span class="s
           <p>Set <var>request</var>’s <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#concept-request-cache-mode">cache mode</a> to "<code>no-cache</code>" if any of the following are true:</p>
           <ul>
            <li data-md="">
-            <p><var>registration</var>’s <a data-link-type="dfn" href="#dfn-use-cache" id="ref-for-dfn-use-cache-2">use cache</a> is false.</p>
+            <p><var>registration</var>’s <a data-link-type="dfn" href="#dfn-update-via-cache" id="ref-for-dfn-update-via-cache-2">update via cache mode</a> is "<code>none</code>".</p>
            <li data-md="">
             <p>The <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#current-global-object">current global object</a>'s <a data-link-type="dfn" href="#serviceworkerglobalscope-force-bypass-cache-for-importscripts-flag" id="ref-for-serviceworkerglobalscope-force-bypass-cache-for-importscripts-flag-1">force bypass cache for importscripts flag</a> is set.</p>
            <li data-md="">
@@ -4573,7 +4579,7 @@ <h2 class="heading settled" id="algorithms"><span class="content">Appendix A: Al
      <p>A <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-2">job</a> has a <dfn class="dfn-paneled" data-dfn-for="job" data-dfn-type="dfn" data-noexport="" id="dfn-job-scope-url">scope url</dfn> (a <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url">URL</a>).</p>
      <p>A <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-3">job</a> has a <dfn class="dfn-paneled" data-dfn-for="job" data-dfn-type="dfn" data-noexport="" id="dfn-job-script-url">script url</dfn> (a <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url">URL</a>).</p>
      <p>A <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-4">job</a> has a <dfn class="dfn-paneled" data-dfn-for="job" data-dfn-type="dfn" data-noexport="" id="dfn-job-worker-type">worker type</dfn> ("<code>classic</code>" or "<code>module</code>").</p>
-     <p>A <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-5">job</a> has a <dfn class="dfn-paneled" data-dfn-for="job" data-dfn-type="dfn" data-noexport="" id="dfn-job-use-cache">use cache</dfn> (a boolean).</p>
+     <p>A <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-5">job</a> has an <dfn class="dfn-paneled" data-dfn-for="job" data-dfn-type="dfn" data-noexport="" id="dfn-job-update-via-cache-mode">update via cache mode</dfn>, which is "<code>imports</code>", "<code>all</code>", or "<code>none</code>".</p>
      <p>A <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-6">job</a> has a <dfn class="dfn-paneled" data-dfn-for="job" data-dfn-type="dfn" data-noexport="" id="dfn-job-client">client</dfn> (a <a data-link-type="dfn" href="#dfn-service-worker-client" id="ref-for-dfn-service-worker-client-36">service worker client</a>). It is initially null.</p>
      <p>A <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-7">job</a> has a <dfn class="dfn-paneled" data-dfn-for="job" data-dfn-type="dfn" data-noexport="" id="job-referrer">referrer</dfn> (a <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url">URL</a> or null).</p>
      <p>A <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-8">job</a> has a <dfn class="dfn-paneled" data-dfn-for="job" data-dfn-type="dfn" data-noexport="" id="dfn-job-promise">job promise</dfn> (a <a data-link-type="dfn" href="http://tc39.github.io/ecma262/#sec-promise-objects">promise</a>). It is initially null.</p>
@@ -4764,7 +4770,7 @@ <h3 class="heading settled" id="start-register-algorithm"><span class="content">
       <dd data-md="">
        <p><var>workerType</var>, a <a data-link-type="dfn" href="#dfn-job-worker-type" id="ref-for-dfn-job-worker-type-2">worker type</a></p>
       <dd data-md="">
-       <p><var>useCache</var>, a boolean</p>
+       <p><var>updateViaCache</var>, an <a data-link-type="dfn" href="#dfn-update-via-cache" id="ref-for-dfn-update-via-cache-3">update via cache mode</a></p>
       <dt data-md="">Output
       <dd data-md="">
        <p>none</p>
@@ -4790,7 +4796,7 @@ <h3 class="heading settled" id="start-register-algorithm"><span class="content">
       <li data-md="">
        <p>Set <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-worker-type" id="ref-for-dfn-job-worker-type-3">worker type</a> to <var>workerType</var>.</p>
       <li data-md="">
-       <p>Set <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-use-cache" id="ref-for-dfn-job-use-cache-1">use cache</a> to <var>useCache</var>.</p>
+       <p>Set <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-update-via-cache-mode" id="ref-for-dfn-job-update-via-cache-mode-1">update via cache mode</a> to <var>updateViaCache</var>.</p>
       <li data-md="">
        <p>Set <var>job</var>’s <a data-link-type="dfn" href="#job-referrer" id="ref-for-job-referrer-2">referrer</a> to <var>referrer</var>.</p>
       <li data-md="">
@@ -4842,7 +4848,7 @@ <h3 class="heading settled" id="register-algorithm"><span class="content"><dfn c
         <li data-md="">
          <p>Let <var>newestWorker</var> be the result of running the <a data-link-type="dfn" href="#get-newest-worker" id="ref-for-get-newest-worker-2">Get Newest Worker</a> algorithm passing <var>registration</var> as the argument.</p>
         <li data-md="">
-         <p>If <var>newestWorker</var> is not null, <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-script-url" id="ref-for-dfn-job-script-url-5">script url</a> <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url-equals">equals</a> <var>newestWorker</var>’s <a data-link-type="dfn" href="#dfn-script-url" id="ref-for-dfn-script-url-3">script url</a> with the <em>exclude fragments flag</em> set, and <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-use-cache" id="ref-for-dfn-job-use-cache-2">use cache</a>'s value equals <var>registration</var>’s <a data-link-type="dfn" href="#dfn-use-cache" id="ref-for-dfn-use-cache-3">use cache</a>'s value, then:</p>
+         <p>If <var>newestWorker</var> is not null, <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-script-url" id="ref-for-dfn-job-script-url-5">script url</a> <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url-equals">equals</a> <var>newestWorker</var>’s <a data-link-type="dfn" href="#dfn-script-url" id="ref-for-dfn-script-url-3">script url</a> with the <em>exclude fragments flag</em> set, and <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-update-via-cache-mode" id="ref-for-dfn-job-update-via-cache-mode-2">update via cache mode</a>'s value equals <var>registration</var>’s <a data-link-type="dfn" href="#dfn-update-via-cache" id="ref-for-dfn-update-via-cache-4">update via cache mode</a>, then:</p>
          <ol>
           <li data-md="">
            <p>Invoke <a data-link-type="dfn" href="#resolve-job-promise" id="ref-for-resolve-job-promise-1">Resolve Job Promise</a> with <var>job</var> and the <code class="idl"><a data-link-type="idl" href="#serviceworkerregistration" id="ref-for-serviceworkerregistration-17">ServiceWorkerRegistration</a></code> object which represents <var>registration</var>.</p>
@@ -4854,7 +4860,7 @@ <h3 class="heading settled" id="register-algorithm"><span class="content"><dfn c
        <p>Else:</p>
        <ol>
         <li data-md="">
-         <p>Invoke <a data-link-type="dfn" href="#set-registration" id="ref-for-set-registration-1">Set Registration</a> algorithm with <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-scope-url" id="ref-for-dfn-job-scope-url-7">scope url</a> and <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-use-cache" id="ref-for-dfn-job-use-cache-3">use cache</a>.</p>
+         <p>Invoke <a data-link-type="dfn" href="#set-registration" id="ref-for-set-registration-1">Set Registration</a> algorithm with <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-scope-url" id="ref-for-dfn-job-scope-url-7">scope url</a> and <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-update-via-cache-mode" id="ref-for-dfn-job-update-via-cache-mode-3">update via cache mode</a>.</p>
        </ol>
       <li data-md="">
        <p>Invoke <a data-link-type="dfn" href="#update" id="ref-for-update-2">Update</a> algorithm passing <var>job</var> as the argument.</p>
@@ -4914,7 +4920,7 @@ <h3 class="heading settled" id="update-algorithm"><span class="content"><dfn cla
          <p>Set <var>request</var>’s <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#concept-request-cache-mode">cache mode</a> to "<code>no-cache</code>" if any of the following are true:</p>
          <ul>
           <li data-md="">
-           <p><var>registration</var>’s <a data-link-type="dfn" href="#dfn-use-cache" id="ref-for-dfn-use-cache-4">use cache</a> is false.</p>
+           <p><var>registration</var>’s <a data-link-type="dfn" href="#dfn-update-via-cache" id="ref-for-dfn-update-via-cache-5">update via cache mode</a> is not "<code>all</code>".</p>
           <li data-md="">
            <p><var>job</var>’s <a data-link-type="dfn" href="#dfn-job-force-bypass-cache-flag" id="ref-for-dfn-job-force-bypass-cache-flag-1">force bypass cache flag</a> is set.</p>
           <li data-md="">
@@ -5897,7 +5903,7 @@ <h3 class="heading settled" id="set-registration-algorithm"><span class="content
       <dd data-md="">
        <p><var>scope</var>, a <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url">URL</a></p>
       <dd data-md="">
-       <p><var>useCache</var>, a boolean</p>
+       <p><var>updateViaCache</var>, an <a data-link-type="dfn" href="#dfn-update-via-cache" id="ref-for-dfn-update-via-cache-6">update via cache mode</a></p>
       <dt data-md="">Output
       <dd data-md="">
        <p><var>registration</var>, a <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-65">service worker registration</a></p>
@@ -5908,7 +5914,7 @@ <h3 class="heading settled" id="set-registration-algorithm"><span class="content
       <li data-md="">
        <p>Let <var>scopeString</var> be <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url-serializer">serialized</a> <var>scope</var> with the <em>exclude fragment flag</em> set.</p>
       <li data-md="">
-       <p>Let <var>registration</var> be a new <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-66">service worker registration</a> whose <a data-link-type="dfn" href="#dfn-scope-url" id="ref-for-dfn-scope-url-19">scope url</a> is set to <var>scope</var> and <a data-link-type="dfn" href="#dfn-use-cache" id="ref-for-dfn-use-cache-5">use cache</a> is set to <var>useCache</var>.</p>
+       <p>Let <var>registration</var> be a new <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-66">service worker registration</a> whose <a data-link-type="dfn" href="#dfn-scope-url" id="ref-for-dfn-scope-url-19">scope url</a> is set to <var>scope</var> and <a data-link-type="dfn" href="#dfn-update-via-cache" id="ref-for-dfn-update-via-cache-7">update via cache mode</a> is set to <var>updateViaCache</var>.</p>
       <li data-md="">
        <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#map-set">Set</a> <a data-link-type="dfn" href="#dfn-scope-to-registration-map" id="ref-for-dfn-scope-to-registration-map-9">scope to registration map</a>[<var>scopeString</var>] to <var>registration</var>.</p>
       <li data-md="">
@@ -6658,8 +6664,18 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
    <li><a href="#dfn-active-worker">active worker</a><span>, in §2.2</span>
    <li><a href="#dom-cache-addall">addAll(requests)</a><span>, in §6.4.4</span>
    <li><a href="#dom-cache-add">add(request)</a><span>, in §6.4.3</span>
-   <li><a href="#dom-clienttype-all">all</a><span>, in §4.3</span>
-   <li><a href="#dom-clienttype-all">"all"</a><span>, in §4.3</span>
+   <li>
+    all
+    <ul>
+     <li><a href="#dom-serviceworkerupdateviacache-all">enum-value for ServiceWorkerUpdateViaCache</a><span>, in §3.2</span>
+     <li><a href="#dom-clienttype-all">enum-value for ClientType</a><span>, in §4.3</span>
+    </ul>
+   <li>
+    "all"
+    <ul>
+     <li><a href="#dom-serviceworkerupdateviacache-all">enum-value for ServiceWorkerUpdateViaCache</a><span>, in §3.2</span>
+     <li><a href="#dom-clienttype-all">enum-value for ClientType</a><span>, in §4.3</span>
+    </ul>
    <li><a href="#dom-windowclient-ancestororigins">ancestorOrigins</a><span>, in §4.2.8</span>
    <li><a href="#windowclient-ancestor-origins-array">ancestor origins array</a><span>, in §4.2</span>
    <li><a href="#batch-cache-operations">Batch Cache Operations</a><span>, in §Unnumbered section</span>
@@ -6767,6 +6783,8 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
    <li><a href="#dom-cachequeryoptions-ignoresearch">ignoreSearch</a><span>, in §6.4</span>
    <li><a href="#dom-cachequeryoptions-ignorevary">ignoreVary</a><span>, in §6.4</span>
    <li><a href="#dfn-imported-scripts-updated-flag">imported scripts updated flag</a><span>, in §2.1</span>
+   <li><a href="#dom-serviceworkerupdateviacache-imports">"imports"</a><span>, in §3.2</span>
+   <li><a href="#dom-serviceworkerupdateviacache-imports">imports</a><span>, in §3.2</span>
    <li><a href="#importscripts-method">importScripts(urls)</a><span>, in §7.3.2</span>
    <li><a href="#dom-clientqueryoptions-includereserved">includeReserved</a><span>, in §4.3</span>
    <li><a href="#dom-clientqueryoptions-includeuncontrolled">includeUncontrolled</a><span>, in §4.3</span>
@@ -6848,6 +6866,8 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
      <li><a href="#navigationpreloadmanager">(interface)</a><span>, in §3.6</span>
     </ul>
    <li><a href="#dictdef-navigationpreloadstate">NavigationPreloadState</a><span>, in §3.6</span>
+   <li><a href="#dom-serviceworkerupdateviacache-none">"none"</a><span>, in §3.2</span>
+   <li><a href="#dom-serviceworkerupdateviacache-none">none</a><span>, in §3.2</span>
    <li><a href="#notify-controller-change">Notify Controller Change</a><span>, in §Unnumbered section</span>
    <li><a href="#dom-serviceworkerglobalscope-onactivate">onactivate</a><span>, in §4.1.4</span>
    <li><a href="#dom-serviceworkercontainer-oncontrollerchange">oncontrollerchange</a><span>, in §3.4.7</span>
@@ -7032,6 +7052,7 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
      <li><a href="#serviceworkerregistration-service-worker-registration">dfn for ServiceWorkerRegistration</a><span>, in §3.2</span>
     </ul>
    <li><a href="#enumdef-serviceworkerstate">ServiceWorkerState</a><span>, in §3.1</span>
+   <li><a href="#enumdef-serviceworkerupdateviacache">ServiceWorkerUpdateViaCache</a><span>, in §3.2</span>
    <li><a href="#dom-navigationpreloadmanager-setheadervalue">setHeaderValue(value)</a><span>, in §3.6.3</span>
    <li><a href="#dfn-set-of-event-types-to-handle">set of event types to handle</a><span>, in §2.1</span>
    <li><a href="#dfn-set-of-extended-events">set of extended events</a><span>, in §2.1</span>
@@ -7084,22 +7105,22 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
    <li><a href="#service-worker-registration-updatefound-event">updatefound</a><span>, in §3.5</span>
    <li><a href="#update-registration-state">Update Registration State</a><span>, in §Unnumbered section</span>
    <li><a href="#update-service-worker-extended-events-set">Update Service Worker Extended Events Set</a><span>, in §Unnumbered section</span>
-   <li><a href="#update-worker-state">Update Worker State</a><span>, in §Unnumbered section</span>
-   <li><a href="#dom-client-url">url</a><span>, in §4.2.1</span>
    <li>
-    use cache
+    updateViaCache
     <ul>
-     <li><a href="#dfn-use-cache">dfn for service worker registration</a><span>, in §2.2</span>
-     <li><a href="#dfn-job-use-cache">dfn for job</a><span>, in §Unnumbered section</span>
+     <li><a href="#dom-serviceworkerregistration-updateviacache">attribute for ServiceWorkerRegistration</a><span>, in §3.2.6</span>
+     <li><a href="#dom-registrationoptions-updateviacache">dict-member for RegistrationOptions</a><span>, in §3.4</span>
+     <li><a href="#link-updateviacache-attribute">attribute for HTMLLinkElement</a><span>, in §5.3</span>
+     <li><a href="#element-attrdef-link-updateviacache">element-attr for link</a><span>, in §5.3</span>
     </ul>
-   <li><a href="#element-attrdef-link-usecache">usecache</a><span>, in §5.3</span>
    <li>
-    useCache
+    update via cache mode
     <ul>
-     <li><a href="#dom-serviceworkerregistration-usecache">attribute for ServiceWorkerRegistration</a><span>, in §3.2.6</span>
-     <li><a href="#dom-registrationoptions-usecache">dict-member for RegistrationOptions</a><span>, in §3.4</span>
-     <li><a href="#link-usecache-attribute">attribute for HTMLLinkElement</a><span>, in §5.3</span>
+     <li><a href="#dfn-update-via-cache">dfn for service worker registration</a><span>, in §2.2</span>
+     <li><a href="#dfn-job-update-via-cache-mode">dfn for job</a><span>, in §Unnumbered section</span>
     </ul>
+   <li><a href="#update-worker-state">Update Worker State</a><span>, in §Unnumbered section</span>
+   <li><a href="#dom-client-url">url</a><span>, in §4.2.1</span>
    <li><a href="#dfn-use">used</a><span>, in §2.4</span>
    <li><a href="#dfn-use">uses</a><span>, in §2.4</span>
    <li><a href="#dfn-use">using</a><span>, in §2.4</span>
@@ -7367,7 +7388,7 @@ <h3 class="no-num no-ref heading settled" id="index-defined-elsewhere"><span cla
      <li><a href="https://infra.spec.whatwg.org/#ascii-case-insensitive">ascii case-insensitive</a>
      <li><a href="https://infra.spec.whatwg.org/#byte-sequence">byte sequence</a>
      <li><a href="https://infra.spec.whatwg.org/#list-contain">contain</a>
-     <li><a href="https://infra.spec.whatwg.org/#map-exists">exists</a>
+     <li><a href="https://infra.spec.whatwg.org/#map-exists">exist</a>
      <li><a href="https://infra.spec.whatwg.org/#map-iterate">for each</a>
      <li><a href="https://infra.spec.whatwg.org/#map-getting-the-keys">get the keys</a>
      <li><a href="https://infra.spec.whatwg.org/#list-item">item</a>
@@ -7544,7 +7565,7 @@ <h2 class="no-num no-ref heading settled" id="idl-index"><span class="content">I
   [<a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#SameObject"><span class="nv">SameObject</span></a>] <span class="kt"><span class="kt">readonly</span></span> <span class="kt"><span class="kt">attribute</span></span> <a class="n" data-link-type="idl-name" href="#navigationpreloadmanager"><span class="n">NavigationPreloadManager</span></a> <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="NavigationPreloadManager" href="#dom-serviceworkerregistration-navigationpreload"><span class="nv">navigationPreload</span></a>;
 
   <span class="kt"><span class="kt">readonly</span></span> <span class="kt"><span class="kt">attribute</span></span> <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-USVString"><span class="kt"><span class="kt">USVString</span></span></a> <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="USVString" href="#dom-serviceworkerregistration-scope"><span class="nv">scope</span></a>;
-  <span class="kt"><span class="kt">readonly</span></span> <span class="kt"><span class="kt">attribute</span></span> <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-boolean"><span class="kt"><span class="kt">boolean</span></span></a> <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="boolean" href="#dom-serviceworkerregistration-usecache"><span class="nv">useCache</span></a>;
+  <span class="kt"><span class="kt">readonly</span></span> <span class="kt"><span class="kt">attribute</span></span> <a class="n" data-link-type="idl-name" href="#enumdef-serviceworkerupdateviacache"><span class="n">ServiceWorkerUpdateViaCache</span></a> <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="ServiceWorkerUpdateViaCache" href="#dom-serviceworkerregistration-updateviacache"><span class="nv">updateViaCache</span></a>;
 
   [<a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#NewObject"><span class="nv">NewObject</span></a>] <span class="kt"><span class="kt">Promise</span></span>&lt;<span class="kt"><span class="kt">void</span></span>> <a class="nv idl-code" data-link-type="method" href="#dom-serviceworkerregistration-update"><span class="nv">update</span></a>();
   [<a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#NewObject"><span class="nv">NewObject</span></a>] <span class="kt"><span class="kt">Promise</span></span>&lt;<a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-boolean"><span class="kt"><span class="kt">boolean</span></span></a>> <a class="nv idl-code" data-link-type="method" href="#dom-serviceworkerregistration-unregister"><span class="nv">unregister</span></a>();
@@ -7553,6 +7574,12 @@ <h2 class="no-num no-ref heading settled" id="idl-index"><span class="content">I
   <span class="kt"><span class="kt">attribute</span></span> <a class="n" data-link-type="idl-name" href="https://html.spec.whatwg.org/multipage/webappapis.html#eventhandler"><span class="n">EventHandler</span></a> <a class="nv idl-code" data-link-type="attribute" data-type="EventHandler" href="#dom-serviceworkerregistration-onupdatefound"><span class="nv">onupdatefound</span></a>;
 };
 
+<span class="kt"><span class="kt">enum</span></span> <a class="nv" href="#enumdef-serviceworkerupdateviacache"><code><span class="nv">ServiceWorkerUpdateViaCache</span></code></a> {
+  <a class="s" href="#dom-serviceworkerupdateviacache-imports"><code><span class="s">"imports"</span></code></a>,
+  <a class="s" href="#dom-serviceworkerupdateviacache-all"><code><span class="s">"all"</span></code></a>,
+  <a class="s" href="#dom-serviceworkerupdateviacache-none"><code><span class="s">"none"</span></code></a>
+};
+
 <span class="kt"><span class="kt">partial</span></span> <span class="kt"><span class="kt">interface</span></span> <a class="nv idl-code" data-link-type="interface" href="https://html.spec.whatwg.org/multipage/webappapis.html#navigator"><span class="nv">Navigator</span></a> {
   [<a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#SecureContext"><span class="nv">SecureContext</span></a>, <a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#SameObject"><span class="nv">SameObject</span></a>] <span class="kt"><span class="kt">readonly</span></span> <span class="kt"><span class="kt">attribute</span></span> <a class="n" data-link-type="idl-name" href="#serviceworkercontainer"><span class="n">ServiceWorkerContainer</span></a> <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="ServiceWorkerContainer" href="#navigator-service-worker-attribute"><span class="nv">serviceWorker</span></a>;
 };
@@ -7583,7 +7610,7 @@ <h2 class="no-num no-ref heading settled" id="idl-index"><span class="content">I
 <span class="kt"><span class="kt">dictionary</span></span> <a class="nv" href="#dictdef-registrationoptions"><code><span class="nv">RegistrationOptions</span></code></a> {
   <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-USVString"><span class="kt"><span class="kt">USVString</span></span></a> <a class="nv" data-type="USVString " href="#dom-registrationoptions-scope"><code><span class="nv">scope</span></code></a>;
   <a class="n" data-link-type="idl-name" href="https://html.spec.whatwg.org/multipage/workers.html#workertype"><span class="n">WorkerType</span></a> <a class="nv" data-default="&quot;classic&quot;" data-type="WorkerType " href="#dom-registrationoptions-type"><code><span class="nv">type</span></code></a> = "classic";
-  <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-boolean"><span class="kt"><span class="kt">boolean</span></span></a> <a class="nv" data-default="false" data-type="boolean " href="#dom-registrationoptions-usecache"><code><span class="nv">useCache</span></code></a> = <span class="kt"><span class="kt">false</span></span>;
+  <a class="n" data-link-type="idl-name" href="#enumdef-serviceworkerupdateviacache"><span class="n">ServiceWorkerUpdateViaCache</span></a> <a class="nv" data-default="&quot;imports&quot;" data-type="ServiceWorkerUpdateViaCache " href="#dom-registrationoptions-updateviacache"><code><span class="nv">updateViaCache</span></code></a> = "imports";
 };
 
 [<a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#SecureContext"><span class="nv">SecureContext</span></a>, <a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#Exposed"><span class="nv">Exposed</span></a>=(<span class="n"><span class="n">Window</span></span>,<span class="n"><span class="n">Worker</span></span>)]
@@ -7733,7 +7760,7 @@ <h2 class="no-num no-ref heading settled" id="idl-index"><span class="content">I
 <span class="kt"><span class="kt">partial</span></span> <span class="kt"><span class="kt">interface</span></span> <a class="nv idl-code" data-link-type="interface" href="https://html.spec.whatwg.org/multipage/semantics.html#htmllinkelement"><span class="nv">HTMLLinkElement</span></a> {
   [<a class="nv idl-code" data-link-type="extended-attribute" href="https://html.spec.whatwg.org/multipage/scripting.html#cereactions"><span class="nv">CEReactions</span></a>] <span class="kt"><span class="kt">attribute</span></span> <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-USVString"><span class="kt"><span class="kt">USVString</span></span></a> <a class="nv idl-code" data-link-type="attribute" data-type="USVString" href="#link-scope-attribute"><span class="nv">scope</span></a>;
   [<a class="nv idl-code" data-link-type="extended-attribute" href="https://html.spec.whatwg.org/multipage/scripting.html#cereactions"><span class="nv">CEReactions</span></a>] <span class="kt"><span class="kt">attribute</span></span> <a class="n" data-link-type="idl-name" href="https://html.spec.whatwg.org/multipage/workers.html#workertype"><span class="n">WorkerType</span></a> <a class="nv idl-code" data-link-type="attribute" data-type="WorkerType" href="#link-workertype-attribute"><span class="nv">workerType</span></a>;
-  [<a class="nv idl-code" data-link-type="extended-attribute" href="https://html.spec.whatwg.org/multipage/scripting.html#cereactions"><span class="nv">CEReactions</span></a>] <span class="kt"><span class="kt">attribute</span></span> <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-boolean"><span class="kt"><span class="kt">boolean</span></span></a> <a class="nv idl-code" data-link-type="attribute" data-type="boolean" href="#link-usecache-attribute"><span class="nv">useCache</span></a>;
+  [<a class="nv idl-code" data-link-type="extended-attribute" href="https://html.spec.whatwg.org/multipage/scripting.html#cereactions"><span class="nv">CEReactions</span></a>] <span class="kt"><span class="kt">attribute</span></span> <a class="n" data-link-type="idl-name" href="#enumdef-serviceworkerupdateviacache"><span class="n">ServiceWorkerUpdateViaCache</span></a> <a class="nv idl-code" data-link-type="attribute" data-type="ServiceWorkerUpdateViaCache" href="#link-updateviacache-attribute"><span class="nv">updateViaCache</span></a>;
 };
 
 <span class="kt"><span class="kt">partial</span></span> <span class="kt"><span class="kt">interface</span></span> <a class="nv idl-code" data-link-type="interface" href="https://html.spec.whatwg.org/multipage/webappapis.html#windoworworkerglobalscope"><span class="nv">WindowOrWorkerGlobalScope</span></a> {
@@ -8143,14 +8170,15 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
     <li><a href="#ref-for-dfn-last-update-check-time-11">Handle Functional Event</a> <a href="#ref-for-dfn-last-update-check-time-12">(2)</a>
    </ul>
   </aside>
-  <aside class="dfn-panel" data-for="dfn-use-cache">
-   <b><a href="#dfn-use-cache">#dfn-use-cache</a></b><b>Referenced in:</b>
+  <aside class="dfn-panel" data-for="dfn-update-via-cache">
+   <b><a href="#dfn-update-via-cache">#dfn-update-via-cache</a></b><b>Referenced in:</b>
    <ul>
-    <li><a href="#ref-for-dfn-use-cache-1">3.2.6. useCache</a>
-    <li><a href="#ref-for-dfn-use-cache-2">7.3.2. importScripts(urls)</a>
-    <li><a href="#ref-for-dfn-use-cache-3">Register</a>
-    <li><a href="#ref-for-dfn-use-cache-4">Update</a>
-    <li><a href="#ref-for-dfn-use-cache-5">Set Registration</a>
+    <li><a href="#ref-for-dfn-update-via-cache-1">3.2.6. updateViaCache</a>
+    <li><a href="#ref-for-dfn-update-via-cache-2">7.3.2. importScripts(urls)</a>
+    <li><a href="#ref-for-dfn-update-via-cache-3">Start Register</a>
+    <li><a href="#ref-for-dfn-update-via-cache-4">Register</a>
+    <li><a href="#ref-for-dfn-update-via-cache-5">Update</a>
+    <li><a href="#ref-for-dfn-update-via-cache-6">Set Registration</a> <a href="#ref-for-dfn-update-via-cache-7">(2)</a>
    </ul>
   </aside>
   <aside class="dfn-panel" data-for="dfn-uninstalling-flag">
@@ -8424,12 +8452,20 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
     <li><a href="#ref-for-serviceworkerregistration-21">Update Registration State</a>
    </ul>
   </aside>
+  <aside class="dfn-panel" data-for="enumdef-serviceworkerupdateviacache">
+   <b><a href="#enumdef-serviceworkerupdateviacache">#enumdef-serviceworkerupdateviacache</a></b><b>Referenced in:</b>
+   <ul>
+    <li><a href="#ref-for-enumdef-serviceworkerupdateviacache-1">3.2. ServiceWorkerRegistration</a>
+    <li><a href="#ref-for-enumdef-serviceworkerupdateviacache-2">3.4. ServiceWorkerContainer</a>
+    <li><a href="#ref-for-enumdef-serviceworkerupdateviacache-3">5.3. Link element interface extensions</a>
+   </ul>
+  </aside>
   <aside class="dfn-panel" data-for="serviceworkerregistration-service-worker-registration">
    <b><a href="#serviceworkerregistration-service-worker-registration">#serviceworkerregistration-service-worker-registration</a></b><b>Referenced in:</b>
    <ul>
     <li><a href="#ref-for-serviceworkerregistration-service-worker-registration-1">3.2.4. navigationPreload</a>
     <li><a href="#ref-for-serviceworkerregistration-service-worker-registration-2">3.2.5. scope</a>
-    <li><a href="#ref-for-serviceworkerregistration-service-worker-registration-3">3.2.6. useCache</a>
+    <li><a href="#ref-for-serviceworkerregistration-service-worker-registration-3">3.2.6. updateViaCache</a>
     <li><a href="#ref-for-serviceworkerregistration-service-worker-registration-4">3.2.7. update()</a>
     <li><a href="#ref-for-serviceworkerregistration-service-worker-registration-5">3.2.8. unregister()</a>
     <li><a href="#ref-for-serviceworkerregistration-service-worker-registration-6">3.5. Events</a>
@@ -8473,11 +8509,11 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
     <li><a href="#ref-for-dom-serviceworkerregistration-scope-2">3.2.5. scope</a>
    </ul>
   </aside>
-  <aside class="dfn-panel" data-for="dom-serviceworkerregistration-usecache">
-   <b><a href="#dom-serviceworkerregistration-usecache">#dom-serviceworkerregistration-usecache</a></b><b>Referenced in:</b>
+  <aside class="dfn-panel" data-for="dom-serviceworkerregistration-updateviacache">
+   <b><a href="#dom-serviceworkerregistration-updateviacache">#dom-serviceworkerregistration-updateviacache</a></b><b>Referenced in:</b>
    <ul>
-    <li><a href="#ref-for-dom-serviceworkerregistration-usecache-1">3.2. ServiceWorkerRegistration</a>
-    <li><a href="#ref-for-dom-serviceworkerregistration-usecache-2">3.2.6. useCache</a>
+    <li><a href="#ref-for-dom-serviceworkerregistration-updateviacache-1">3.2. ServiceWorkerRegistration</a>
+    <li><a href="#ref-for-dom-serviceworkerregistration-updateviacache-2">3.2.6. updateViaCache</a>
    </ul>
   </aside>
   <aside class="dfn-panel" data-for="dom-serviceworkerregistration-update">
@@ -8535,10 +8571,10 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
     <li><a href="#ref-for-dom-registrationoptions-type-1">3.4.3. register(scriptURL, options)</a>
    </ul>
   </aside>
-  <aside class="dfn-panel" data-for="dom-registrationoptions-usecache">
-   <b><a href="#dom-registrationoptions-usecache">#dom-registrationoptions-usecache</a></b><b>Referenced in:</b>
+  <aside class="dfn-panel" data-for="dom-registrationoptions-updateviacache">
+   <b><a href="#dom-registrationoptions-updateviacache">#dom-registrationoptions-updateviacache</a></b><b>Referenced in:</b>
    <ul>
-    <li><a href="#ref-for-dom-registrationoptions-usecache-1">3.4.3. register(scriptURL, options)</a>
+    <li><a href="#ref-for-dom-registrationoptions-updateviacache-1">3.4.3. register(scriptURL, options)</a>
    </ul>
   </aside>
   <aside class="dfn-panel" data-for="serviceworkercontainer-service-worker-client">
@@ -9470,16 +9506,16 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
     <li><a href="#ref-for-element-attrdef-link-workertype-1">5.2. Processing the link element</a> <a href="#ref-for-element-attrdef-link-workertype-2">(2)</a>
    </ul>
   </aside>
-  <aside class="dfn-panel" data-for="link-usecache-attribute">
-   <b><a href="#link-usecache-attribute">#link-usecache-attribute</a></b><b>Referenced in:</b>
+  <aside class="dfn-panel" data-for="link-updateviacache-attribute">
+   <b><a href="#link-updateviacache-attribute">#link-updateviacache-attribute</a></b><b>Referenced in:</b>
    <ul>
-    <li><a href="#ref-for-link-usecache-attribute-1">5.3. Link element interface extensions</a>
+    <li><a href="#ref-for-link-updateviacache-attribute-1">5.3. Link element interface extensions</a>
    </ul>
   </aside>
-  <aside class="dfn-panel" data-for="element-attrdef-link-usecache">
-   <b><a href="#element-attrdef-link-usecache">#element-attrdef-link-usecache</a></b><b>Referenced in:</b>
+  <aside class="dfn-panel" data-for="element-attrdef-link-updateviacache">
+   <b><a href="#element-attrdef-link-updateviacache">#element-attrdef-link-updateviacache</a></b><b>Referenced in:</b>
    <ul>
-    <li><a href="#ref-for-element-attrdef-link-usecache-1">5.2. Processing the link element</a>
+    <li><a href="#ref-for-element-attrdef-link-updateviacache-1">5.2. Processing the link element</a> <a href="#ref-for-element-attrdef-link-updateviacache-2">(2)</a> <a href="#ref-for-element-attrdef-link-updateviacache-3">(3)</a>
    </ul>
   </aside>
   <aside class="dfn-panel" data-for="dfn-fetching-record">
@@ -9800,11 +9836,11 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
     <li><a href="#ref-for-dfn-job-worker-type-6">Soft Update</a>
    </ul>
   </aside>
-  <aside class="dfn-panel" data-for="dfn-job-use-cache">
-   <b><a href="#dfn-job-use-cache">#dfn-job-use-cache</a></b><b>Referenced in:</b>
+  <aside class="dfn-panel" data-for="dfn-job-update-via-cache-mode">
+   <b><a href="#dfn-job-update-via-cache-mode">#dfn-job-update-via-cache-mode</a></b><b>Referenced in:</b>
    <ul>
-    <li><a href="#ref-for-dfn-job-use-cache-1">Start Register</a>
-    <li><a href="#ref-for-dfn-job-use-cache-2">Register</a> <a href="#ref-for-dfn-job-use-cache-3">(2)</a>
+    <li><a href="#ref-for-dfn-job-update-via-cache-mode-1">Start Register</a>
+    <li><a href="#ref-for-dfn-job-update-via-cache-mode-2">Register</a> <a href="#ref-for-dfn-job-update-via-cache-mode-3">(2)</a>
    </ul>
   </aside>
   <aside class="dfn-panel" data-for="dfn-job-client">
diff --git a/docs/v1/index.bs b/docs/v1/index.bs
index b76fe2e5..b3df5190 100644
--- a/docs/v1/index.bs
+++ b/docs/v1/index.bs
@@ -191,7 +191,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
 
     A [=/service worker registration=] has an associated <dfn export id="dfn-last-update-check-time">last update check time</dfn>. It is initially set to null.
 
-    A [=/service worker registration=] has an associated <dfn export id="dfn-use-cache">use cache</dfn> (a boolean). It is initially set to false.
+    A [=/service worker registration=] has an associated <dfn export id="dfn-update-via-cache">update via cache mode</dfn>, which is "`imports`", "`all`", or "`none`". It is initially set to "`imports`".
 
     A [=/service worker registration=] has an associated <dfn export id="dfn-uninstalling-flag">uninstalling flag</dfn>. It is initially unset.
 
@@ -394,7 +394,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
         readonly attribute ServiceWorker? active;
 
         readonly attribute USVString scope;
-        readonly attribute boolean useCache;
+        readonly attribute ServiceWorkerUpdateViaCache updateViaCache;
 
         [NewObject] Promise&lt;void&gt; update();
         [NewObject] Promise&lt;boolean&gt; unregister();
@@ -402,6 +402,12 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
         // event
         attribute EventHandler onupdatefound;
       };
+
+      enum ServiceWorkerUpdateViaCache {
+        "imports",
+        "all",
+        "none"
+      };
     </pre>
 
     A {{ServiceWorkerRegistration}} object represents a [=/service worker registration=]. Each {{ServiceWorkerRegistration}} object is associated with a <dfn for="ServiceWorkerRegistration">service worker registration</dfn> (a [=/service worker registration=]). Multiple separate objects implementing the {{ServiceWorkerRegistration}} interface across documents and workers can all be associated with the same [=/service worker registration=] simultaneously.
@@ -440,10 +446,10 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       </div>
     </section>
 
-    <section algorithm="service-worker-registration-usecache">
-      <h4 id="service-worker-registration-usecache">{{ServiceWorkerRegistration/useCache}}</h4>
+    <section algorithm="service-worker-registration-updateviacache">
+      <h4 id="service-worker-registration-updateviacache">{{ServiceWorkerRegistration/updateViaCache}}</h4>
 
-      The <dfn attribute for="ServiceWorkerRegistration"><code>useCache</code></dfn> attribute *must* return [=ServiceWorkerRegistration/service worker registration=]'s [=service worker registration/use cache=].
+      The <dfn attribute for="ServiceWorkerRegistration"><code>updateViaCache</code></dfn> attribute *must* return [=ServiceWorkerRegistration/service worker registration=]'s [=service worker registration/update via cache mode=].
     </section>
 
     <section algorithm="service-worker-registration-update">
@@ -540,7 +546,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       dictionary RegistrationOptions {
         USVString scope;
         WorkerType type = "classic";
-        boolean useCache = false;
+        ServiceWorkerUpdateViaCache updateViaCache = "imports";
       };
     </pre>
 
@@ -612,7 +618,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
         1. If any of the strings in |scopeURL|'s [=url/path=] contains either <a>ASCII case-insensitive</a> "<code>%2f</code>" or <a>ASCII case-insensitive</a> "<code>%5c</code>", reject |p| with a <code>TypeError</code> and abort these steps.
         1. Let |job| be the result of running <a>Create Job</a> with *register*, |scopeURL|, |scriptURL|, |p|, and |client|.
         1. Set |job|'s [=job/worker type=] to |options|.{{RegistrationOptions/type}}.
-        1. Set |job|'s [=job/use cache=] to |options|.{{RegistrationOptions/useCache}}.
+        1. Set |job|'s [=job/update via cache mode=] to |options|.{{RegistrationOptions/updateViaCache}}.
         1. Invoke <a>Schedule Job</a> with |job|.
         1. Return |p|.
     </section>
@@ -1951,7 +1957,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
             1. Let |registration| be |serviceWorker|'s [=containing service worker registration=].
             1. Set |request|'s [=service-workers mode=] to "`foreign`".
             1. Set |request|'s [=request/cache mode=] to "<code>no-cache</code>" if any of the following are true:
-                * |registration|'s [=service worker registration/use cache=] is false.
+                * |registration|'s [=service worker registration/update via cache mode=] is "`none`".
                 * The [=current global object=]'s [=force bypass cache for importscripts flag=] is set.
                 * |registration|'s [=last update check time=] is not null and the time difference in seconds calculated by the current time minus |registration|’s [=last update check time=] is greater than 86400.
             1. Let |response| be the result of <a lt="fetch">fetching</a> |request|.
@@ -2067,7 +2073,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
 
     A <a>job</a> has a <dfn id="dfn-job-worker-type">worker type</dfn> ("<code>classic</code>" or "<code>module</code>").
 
-    A <a>job</a> has a <dfn id="dfn-job-use-cache">use cache</dfn> (a boolean).
+    A <a>job</a> has an <dfn id="dfn-job-update-via-cache-mode">update via cache mode</dfn>, which is "`imports`", "`all`", or "`none`".
 
     A <a>job</a> has a <dfn id="dfn-job-client">client</dfn> (a [=/service worker client=]). It is initially null.
 
@@ -2204,11 +2210,11 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       1. If |registration| is not null, then:
           1. If |registration|'s <a>uninstalling flag</a> is set, unset it.
           1. Let |newestWorker| be the result of running the <a>Get Newest Worker</a> algorithm passing |registration| as the argument.
-          1. If |newestWorker| is not null, |job|'s [=job/script url=] [=url/equals=] |newestWorker|'s [=service worker/script url=] with the *exclude fragments flag* set, and |job|'s [=job/use cache=]'s value equals |registration|'s [=service worker registration/use cache=]'s value, then:
+          1. If |newestWorker| is not null, |job|'s [=job/script url=] [=url/equals=] |newestWorker|'s [=service worker/script url=] with the *exclude fragments flag* set, and |job|'s [=job/update via cache mode=]'s value equals |registration|'s [=service worker registration/update via cache mode=]'s value, then:
               1. Invoke <a>Resolve Job Promise</a> with |job| and the {{ServiceWorkerRegistration}} object which represents |registration|.
               1. Invoke <a>Finish Job</a> with |job| and abort these steps.
       1. Else:
-          1. Invoke <a>Set Registration</a> algorithm with |job|'s [=job/scope url=] and |job|'s [=job/use cache=].
+          1. Invoke <a>Set Registration</a> algorithm with |job|'s [=job/scope url=] and |job|'s [=job/update via cache mode=].
       1. Invoke <a>Update</a> algorithm passing |job| as the argument.
   </section>
 
@@ -2244,7 +2250,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
             Note: See the definition of the Service-Worker header in Appendix B: Extended HTTP headers.
 
           1. Set |request|'s [=request/cache mode=] to "<code>no-cache</code>" if any of the following are true:
-              * |registration|'s [=service worker registration/use cache=] is false.
+              * |registration|'s [=service worker registration/update via cache mode=] is not "`all`".
               * |job|'s [=force bypass cache flag=] is set.
               * |newestWorker| is not null, and |registration|'s [=last update check time=] is not null and the time difference in seconds calculated by the current time minus |registration|’s [=last update check time=] is greater than 86400.
 
@@ -2713,13 +2719,13 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
 
       : Input
       :: |scope|, a [=/URL=]
-      :: |useCache|, a boolean
+      :: |updateViaCache|, an [=service worker registration/update via cache mode=]
       : Output
       :: |registration|, a [=/service worker registration=]
 
       1. Run the following steps atomically.
       1. Let |scopeString| be <a lt="URL serializer">serialized</a> |scope| with the *exclude fragment flag* set.
-      1. Let |registration| be a new [=/service worker registration=] whose [=service worker registration/scope url=] is set to |scope| and [=service worker registration/use cache=] is set to |useCache|.
+      1. Let |registration| be a new [=/service worker registration=] whose [=service worker registration/scope url=] is set to |scope| and [=service worker registration/update via cache mode=] is set to |updateViaCache|.
       1. [=map/Set=] <a>scope to registration map</a>[|scopeString|] to |registration|.
       1. Return |registration|.
   </section>
diff --git a/docs/v1/index.html b/docs/v1/index.html
index 0e5d1804..b8757034 100644
--- a/docs/v1/index.html
+++ b/docs/v1/index.html
@@ -1177,7 +1177,7 @@
 		}
 	}
 </style>
-  <meta content="Bikeshed version 5eac41affc3976771f238ed8f80db1c877b65b40" name="generator">
+  <meta content="Bikeshed version 34209db86579ed3f0e75afb470f2788a2646155f" name="generator">
   <link href="https://www.w3.org/TR/service-workers/" rel="canonical">
 <style>/* style-md-lists */
 
@@ -1425,7 +1425,7 @@
   <div class="head">
    <p data-fill-with="logo"><a class="logo" href="https://www.w3.org/"> <img alt="W3C" height="48" src="https://www.w3.org/StyleSheets/TR/2016/logos/W3C" width="72"> </a> </p>
    <h1 class="p-name no-ref" id="title">Service Workers 1</h1>
-   <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Editor’s Draft, <time class="dt-updated" datetime="2017-05-30">30 May 2017</time></span></h2>
+   <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Editor’s Draft, <time class="dt-updated" datetime="2017-06-05">5 June 2017</time></span></h2>
    <div data-fill-with="spec-metadata">
     <dl>
      <dt>This version:
@@ -1513,7 +1513,7 @@ <h2 class="no-num no-toc no-ref" id="contents">Table of Contents</h2>
         <li><a href="#navigator-service-worker-waiting"><span class="secno">3.2.2</span> <span class="content"><code class="idl"><span>waiting</span></code></span></a>
         <li><a href="#navigator-service-worker-active"><span class="secno">3.2.3</span> <span class="content"><code class="idl"><span>active</span></code></span></a>
         <li><a href="#service-worker-registration-scope"><span class="secno">3.2.4</span> <span class="content"><code class="idl"><span>scope</span></code></span></a>
-        <li><a href="#service-worker-registration-usecache"><span class="secno">3.2.5</span> <span class="content"><code class="idl"><span>useCache</span></code></span></a>
+        <li><a href="#service-worker-registration-updateviacache"><span class="secno">3.2.5</span> <span class="content"><code class="idl"><span>updateViaCache</span></code></span></a>
         <li><a href="#service-worker-registration-update"><span class="secno">3.2.6</span> <span class="content"><code class="idl"><span>update()</span></code></span></a>
         <li><a href="#navigator-service-worker-unregister"><span class="secno">3.2.7</span> <span class="content"><code class="idl"><span>unregister()</span></code></span></a>
         <li><a href="#service-worker-registration-event-handler"><span class="secno">3.2.8</span> <span class="content">Event handler</span></a>
@@ -1764,7 +1764,7 @@ <h3 class="heading settled" data-level="2.2" id="service-worker-registration-con
      <p>A <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-8">service worker registration</a> has an associated <dfn class="dfn-paneled" data-dfn-for="service worker registration" data-dfn-type="dfn" data-export="" id="dfn-waiting-worker">waiting worker</dfn> (a <a data-link-type="dfn" href="#dfn-service-worker" id="ref-for-dfn-service-worker-33">service worker</a> or null) whose <a data-link-type="dfn" href="#dfn-state" id="ref-for-dfn-state-2">state</a> is <em>installed</em>. It is initially set to null.</p>
      <p>A <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-9">service worker registration</a> has an associated <dfn class="dfn-paneled" data-dfn-for="service worker registration" data-dfn-type="dfn" data-export="" id="dfn-active-worker">active worker</dfn> (a <a data-link-type="dfn" href="#dfn-service-worker" id="ref-for-dfn-service-worker-34">service worker</a> or null) whose <a data-link-type="dfn" href="#dfn-state" id="ref-for-dfn-state-3">state</a> is either <em>activating</em> or <em>activated</em>. It is initially set to null.</p>
      <p>A <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-10">service worker registration</a> has an associated <dfn class="dfn-paneled" data-dfn-for="service worker registration" data-dfn-type="dfn" data-export="" id="dfn-last-update-check-time">last update check time</dfn>. It is initially set to null.</p>
-     <p>A <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-11">service worker registration</a> has an associated <dfn class="dfn-paneled" data-dfn-for="service worker registration" data-dfn-type="dfn" data-export="" id="dfn-use-cache">use cache</dfn> (a boolean). It is initially set to false.</p>
+     <p>A <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-11">service worker registration</a> has an associated <dfn class="dfn-paneled" data-dfn-for="service worker registration" data-dfn-type="dfn" data-export="" id="dfn-update-via-cache">update via cache mode</dfn>, which is "<code>imports</code>", "<code>all</code>", or "<code>none</code>". It is initially set to "<code>imports</code>".</p>
      <p>A <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-12">service worker registration</a> has an associated <dfn class="dfn-paneled" data-dfn-for="service worker registration" data-dfn-type="dfn" data-export="" id="dfn-uninstalling-flag">uninstalling flag</dfn>. It is initially unset.</p>
      <p>A <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-13">service worker registration</a> has one or more <dfn class="dfn-paneled" data-dfn-for="service worker registration" data-dfn-type="dfn" data-export="" id="dfn-service-worker-registration-task-queue">task queues</dfn> that back up the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#concept-task">tasks</a> from its <a data-link-type="dfn" href="#dfn-active-worker" id="ref-for-dfn-active-worker-2">active worker</a>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#event-loop">event loop</a>’s corresponding <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#task-queue">task queues</a>. (The target task sources for this back up operation are the <a data-link-type="dfn" href="#dfn-handle-fetch-task-source" id="ref-for-dfn-handle-fetch-task-source-1">handle fetch task source</a> and the <a data-link-type="dfn" href="#dfn-handle-functional-event-task-source" id="ref-for-dfn-handle-functional-event-task-source-1">handle functional event task source</a>.) The user agent dumps the <a data-link-type="dfn" href="#dfn-active-worker" id="ref-for-dfn-active-worker-3">active worker</a>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#concept-task">tasks</a> to the <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-14">service worker registration</a>'s <a data-link-type="dfn" href="#dfn-service-worker-registration-task-queue" id="ref-for-dfn-service-worker-registration-task-queue-1">task queues</a> when the <a data-link-type="dfn" href="#dfn-active-worker" id="ref-for-dfn-active-worker-4">active worker</a> is <a data-link-type="dfn" href="#terminate-service-worker" id="ref-for-terminate-service-worker-2">terminated</a> and <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#queue-a-task">re-queues those tasks</a> to the <a data-link-type="dfn" href="#dfn-active-worker" id="ref-for-dfn-active-worker-5">active worker</a>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#event-loop">event loop</a>’s corresponding <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#task-queue">task queues</a> when the <a data-link-type="dfn" href="#dfn-active-worker" id="ref-for-dfn-active-worker-6">active worker</a> spins off. Unlike the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#task-queue">task queues</a> owned by <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#event-loop">event loops</a>, the <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-15">service worker registration</a>'s <a data-link-type="dfn" href="#dfn-service-worker-registration-task-queue" id="ref-for-dfn-service-worker-registration-task-queue-2">task queues</a> are not processed by any <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#event-loop">event loops</a> in and of itself.</p>
      <section>
@@ -1938,7 +1938,7 @@ <h3 class="heading settled" data-level="3.2" id="serviceworkerregistration-inter
   <span class="kt">readonly</span> <span class="kt">attribute</span> <a class="n" data-link-type="idl-name" href="#serviceworker" id="ref-for-serviceworker-12">ServiceWorker</a>? <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="ServiceWorker?" href="#dom-serviceworkerregistration-active" id="ref-for-dom-serviceworkerregistration-active-1">active</a>;
 
   <span class="kt">readonly</span> <span class="kt">attribute</span> <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-USVString"><span class="kt">USVString</span></a> <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="USVString" href="#dom-serviceworkerregistration-scope" id="ref-for-dom-serviceworkerregistration-scope-1">scope</a>;
-  <span class="kt">readonly</span> <span class="kt">attribute</span> <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-boolean"><span class="kt">boolean</span></a> <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="boolean" href="#dom-serviceworkerregistration-usecache" id="ref-for-dom-serviceworkerregistration-usecache-1">useCache</a>;
+  <span class="kt">readonly</span> <span class="kt">attribute</span> <a class="n" data-link-type="idl-name" href="#enumdef-serviceworkerupdateviacache" id="ref-for-enumdef-serviceworkerupdateviacache-1">ServiceWorkerUpdateViaCache</a> <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="ServiceWorkerUpdateViaCache" href="#dom-serviceworkerregistration-updateviacache" id="ref-for-dom-serviceworkerregistration-updateviacache-1">updateViaCache</a>;
 
   [<a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#NewObject">NewObject</a>] <span class="kt">Promise</span>&lt;<span class="kt">void</span>> <a class="nv idl-code" data-link-type="method" href="#dom-serviceworkerregistration-update" id="ref-for-dom-serviceworkerregistration-update-1">update</a>();
   [<a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#NewObject">NewObject</a>] <span class="kt">Promise</span>&lt;<a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-boolean"><span class="kt">boolean</span></a>> <a class="nv idl-code" data-link-type="method" href="#dom-serviceworkerregistration-unregister" id="ref-for-dom-serviceworkerregistration-unregister-1">unregister</a>();
@@ -1946,6 +1946,12 @@ <h3 class="heading settled" data-level="3.2" id="serviceworkerregistration-inter
   // event
   <span class="kt">attribute</span> <a class="n" data-link-type="idl-name" href="https://html.spec.whatwg.org/multipage/webappapis.html#eventhandler">EventHandler</a> <a class="nv idl-code" data-link-type="attribute" data-type="EventHandler" href="#dom-serviceworkerregistration-onupdatefound" id="ref-for-dom-serviceworkerregistration-onupdatefound-1">onupdatefound</a>;
 };
+
+<span class="kt">enum</span> <dfn class="nv dfn-paneled idl-code" data-dfn-type="enum" data-export="" id="enumdef-serviceworkerupdateviacache"><code>ServiceWorkerUpdateViaCache</code></dfn> {
+  <dfn class="s idl-code" data-dfn-for="ServiceWorkerUpdateViaCache" data-dfn-type="enum-value" data-export="" data-lt="&quot;imports&quot;|imports" id="dom-serviceworkerupdateviacache-imports"><code>"imports"</code><a class="self-link" href="#dom-serviceworkerupdateviacache-imports"></a></dfn>,
+  <dfn class="s idl-code" data-dfn-for="ServiceWorkerUpdateViaCache" data-dfn-type="enum-value" data-export="" data-lt="&quot;all&quot;|all" id="dom-serviceworkerupdateviacache-all"><code>"all"</code><a class="self-link" href="#dom-serviceworkerupdateviacache-all"></a></dfn>,
+  <dfn class="s idl-code" data-dfn-for="ServiceWorkerUpdateViaCache" data-dfn-type="enum-value" data-export="" data-lt="&quot;none&quot;|none" id="dom-serviceworkerupdateviacache-none"><code>"none"</code><a class="self-link" href="#dom-serviceworkerupdateviacache-none"></a></dfn>
+};
 </pre>
      <p>A <code class="idl"><a data-link-type="idl" href="#serviceworkerregistration" id="ref-for-serviceworkerregistration-3">ServiceWorkerRegistration</a></code> object represents a <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-31">service worker registration</a>. Each <code class="idl"><a data-link-type="idl" href="#serviceworkerregistration" id="ref-for-serviceworkerregistration-4">ServiceWorkerRegistration</a></code> object is associated with a <dfn class="dfn-paneled" data-dfn-for="ServiceWorkerRegistration" data-dfn-type="dfn" data-noexport="" id="serviceworkerregistration-service-worker-registration">service worker registration</dfn> (a <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-32">service worker registration</a>). Multiple separate objects implementing the <code class="idl"><a data-link-type="idl" href="#serviceworkerregistration" id="ref-for-serviceworkerregistration-5">ServiceWorkerRegistration</a></code> interface across documents and workers can all be associated with the same <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-33">service worker registration</a> simultaneously.</p>
      <section class="algorithm" data-algorithm="navigator-service-worker-installing">
@@ -1968,9 +1974,9 @@ <h4 class="heading settled" data-level="3.2.4" id="service-worker-registration-s
       <p>The <dfn class="dfn-paneled idl-code" data-dfn-for="ServiceWorkerRegistration" data-dfn-type="attribute" data-export="" id="dom-serviceworkerregistration-scope"><code><code>scope</code></code></dfn> attribute <em>must</em> return <a data-link-type="dfn" href="#serviceworkerregistration-service-worker-registration" id="ref-for-serviceworkerregistration-service-worker-registration-1">service worker registration</a>'s <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url-serializer">serialized</a> <a data-link-type="dfn" href="#dfn-scope-url" id="ref-for-dfn-scope-url-6">scope url</a>.</p>
       <div class="example" id="example-2dbb4b8b"><a class="self-link" href="#example-2dbb4b8b"></a> In the example in <a href="#service-worker-url">§3.1.1 scriptURL</a>, the value of <code>registration.scope</code>, obtained from <code>navigator.serviceWorker.ready.then(registration => console.log(registration.scope))</code> for example, will be "<code>https://example.com/</code>". </div>
      </section>
-     <section class="algorithm" data-algorithm="service-worker-registration-usecache">
-      <h4 class="heading settled" data-level="3.2.5" id="service-worker-registration-usecache"><span class="secno">3.2.5. </span><span class="content"><code class="idl"><a data-link-type="idl" href="#dom-serviceworkerregistration-usecache" id="ref-for-dom-serviceworkerregistration-usecache-2">useCache</a></code></span><a class="self-link" href="#service-worker-registration-usecache"></a></h4>
-      <p>The <dfn class="dfn-paneled idl-code" data-dfn-for="ServiceWorkerRegistration" data-dfn-type="attribute" data-export="" id="dom-serviceworkerregistration-usecache"><code><code>useCache</code></code></dfn> attribute <em>must</em> return <a data-link-type="dfn" href="#serviceworkerregistration-service-worker-registration" id="ref-for-serviceworkerregistration-service-worker-registration-2">service worker registration</a>'s <a data-link-type="dfn" href="#dfn-use-cache" id="ref-for-dfn-use-cache-1">use cache</a>.</p>
+     <section class="algorithm" data-algorithm="service-worker-registration-updateviacache">
+      <h4 class="heading settled" data-level="3.2.5" id="service-worker-registration-updateviacache"><span class="secno">3.2.5. </span><span class="content"><code class="idl"><a data-link-type="idl" href="#dom-serviceworkerregistration-updateviacache" id="ref-for-dom-serviceworkerregistration-updateviacache-2">updateViaCache</a></code></span><a class="self-link" href="#service-worker-registration-updateviacache"></a></h4>
+      <p>The <dfn class="dfn-paneled idl-code" data-dfn-for="ServiceWorkerRegistration" data-dfn-type="attribute" data-export="" id="dom-serviceworkerregistration-updateviacache"><code><code>updateViaCache</code></code></dfn> attribute <em>must</em> return <a data-link-type="dfn" href="#serviceworkerregistration-service-worker-registration" id="ref-for-serviceworkerregistration-service-worker-registration-2">service worker registration</a>'s <a data-link-type="dfn" href="#dfn-update-via-cache" id="ref-for-dfn-update-via-cache-1">update via cache mode</a>.</p>
      </section>
      <section class="algorithm" data-algorithm="service-worker-registration-update">
       <h4 class="heading settled" data-level="3.2.6" id="service-worker-registration-update"><span class="secno">3.2.6. </span><span class="content"><code class="idl"><a data-link-type="idl" href="#dom-serviceworkerregistration-update" id="ref-for-dom-serviceworkerregistration-update-2">update()</a></code></span><a class="self-link" href="#service-worker-registration-update"></a></h4>
@@ -2062,7 +2068,7 @@ <h3 class="heading settled" data-level="3.4" id="serviceworkercontainer-interfac
 <pre class="idl highlight def" id="registration-option-list-dictionary"><span class="kt">dictionary</span> <dfn class="nv dfn-paneled idl-code" data-dfn-type="dictionary" data-export="" id="dictdef-registrationoptions"><code>RegistrationOptions</code></dfn> {
   <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-USVString"><span class="kt">USVString</span></a> <dfn class="nv dfn-paneled idl-code" data-dfn-for="RegistrationOptions" data-dfn-type="dict-member" data-export="" data-type="USVString " id="dom-registrationoptions-scope"><code>scope</code></dfn>;
   <a class="n" data-link-type="idl-name" href="https://html.spec.whatwg.org/multipage/workers.html#workertype">WorkerType</a> <dfn class="nv dfn-paneled idl-code" data-default="&quot;classic&quot;" data-dfn-for="RegistrationOptions" data-dfn-type="dict-member" data-export="" data-type="WorkerType " id="dom-registrationoptions-type"><code>type</code></dfn> = "classic";
-  <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-boolean"><span class="kt">boolean</span></a> <dfn class="nv dfn-paneled idl-code" data-default="false" data-dfn-for="RegistrationOptions" data-dfn-type="dict-member" data-export="" data-type="boolean " id="dom-registrationoptions-usecache"><code>useCache</code></dfn> = <span class="kt">false</span>;
+  <a class="n" data-link-type="idl-name" href="#enumdef-serviceworkerupdateviacache" id="ref-for-enumdef-serviceworkerupdateviacache-2">ServiceWorkerUpdateViaCache</a> <dfn class="nv dfn-paneled idl-code" data-default="&quot;imports&quot;" data-dfn-for="RegistrationOptions" data-dfn-type="dict-member" data-export="" data-type="ServiceWorkerUpdateViaCache " id="dom-registrationoptions-updateviacache"><code>updateViaCache</code></dfn> = "imports";
 };
 </pre>
      <p>The user agent <em>must</em> create a <code class="idl"><a data-link-type="idl" href="#serviceworkercontainer" id="ref-for-serviceworkercontainer-5">ServiceWorkerContainer</a></code> object when a <code class="idl"><a data-link-type="idl" href="https://html.spec.whatwg.org/multipage/webappapis.html#navigator">Navigator</a></code> object or a <code class="idl"><a data-link-type="idl" href="https://html.spec.whatwg.org/multipage/workers.html#workernavigator">WorkerNavigator</a></code> object is created and associate it with that object.</p>
@@ -2150,7 +2156,7 @@ <h4 class="heading settled" data-level="3.4.3" id="navigator-service-worker-regi
        <li data-md="">
         <p>Set <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-worker-type" id="ref-for-dfn-job-worker-type-2">worker type</a> to <var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-registrationoptions-type" id="ref-for-dom-registrationoptions-type-1">type</a></code>.</p>
        <li data-md="">
-        <p>Set <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-use-cache" id="ref-for-dfn-job-use-cache-1">use cache</a> to <var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-registrationoptions-usecache" id="ref-for-dom-registrationoptions-usecache-1">useCache</a></code>.</p>
+        <p>Set <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-update-via-cache-mode" id="ref-for-dfn-job-update-via-cache-mode-1">update via cache mode</a> to <var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-registrationoptions-updateviacache" id="ref-for-dom-registrationoptions-updateviacache-1">updateViaCache</a></code>.</p>
        <li data-md="">
         <p>Invoke <a data-link-type="dfn" href="#schedule-job" id="ref-for-schedule-job-3">Schedule Job</a> with <var>job</var>.</p>
        <li data-md="">
@@ -4008,7 +4014,7 @@ <h4 class="heading settled" data-level="6.3.2" id="importscripts"><span class="s
           <p>Set <var>request</var>’s <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#concept-request-cache-mode">cache mode</a> to "<code>no-cache</code>" if any of the following are true:</p>
           <ul>
            <li data-md="">
-            <p><var>registration</var>’s <a data-link-type="dfn" href="#dfn-use-cache" id="ref-for-dfn-use-cache-2">use cache</a> is false.</p>
+            <p><var>registration</var>’s <a data-link-type="dfn" href="#dfn-update-via-cache" id="ref-for-dfn-update-via-cache-2">update via cache mode</a> is "<code>none</code>".</p>
            <li data-md="">
             <p>The <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#current-global-object">current global object</a>'s <a data-link-type="dfn" href="#serviceworkerglobalscope-force-bypass-cache-for-importscripts-flag" id="ref-for-serviceworkerglobalscope-force-bypass-cache-for-importscripts-flag-1">force bypass cache for importscripts flag</a> is set.</p>
            <li data-md="">
@@ -4109,7 +4115,7 @@ <h2 class="heading settled" id="algorithms"><span class="content">Appendix A: Al
      <p>A <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-2">job</a> has a <dfn class="dfn-paneled" data-dfn-for="job" data-dfn-type="dfn" data-noexport="" id="dfn-job-scope-url">scope url</dfn> (a <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url">URL</a>).</p>
      <p>A <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-3">job</a> has a <dfn class="dfn-paneled" data-dfn-for="job" data-dfn-type="dfn" data-noexport="" id="dfn-job-script-url">script url</dfn> (a <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url">URL</a>).</p>
      <p>A <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-4">job</a> has a <dfn class="dfn-paneled" data-dfn-for="job" data-dfn-type="dfn" data-noexport="" id="dfn-job-worker-type">worker type</dfn> ("<code>classic</code>" or "<code>module</code>").</p>
-     <p>A <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-5">job</a> has a <dfn class="dfn-paneled" data-dfn-for="job" data-dfn-type="dfn" data-noexport="" id="dfn-job-use-cache">use cache</dfn> (a boolean).</p>
+     <p>A <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-5">job</a> has an <dfn class="dfn-paneled" data-dfn-for="job" data-dfn-type="dfn" data-noexport="" id="dfn-job-update-via-cache-mode">update via cache mode</dfn>, which is "<code>imports</code>", "<code>all</code>", or "<code>none</code>".</p>
      <p>A <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-6">job</a> has a <dfn class="dfn-paneled" data-dfn-for="job" data-dfn-type="dfn" data-noexport="" id="dfn-job-client">client</dfn> (a <a data-link-type="dfn" href="#dfn-service-worker-client" id="ref-for-dfn-service-worker-client-36">service worker client</a>). It is initially null.</p>
      <p>A <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-7">job</a> has a <dfn class="dfn-paneled" data-dfn-for="job" data-dfn-type="dfn" data-noexport="" id="dfn-job-promise">job promise</dfn> (a <a data-link-type="dfn" href="http://tc39.github.io/ecma262/#sec-promise-objects">promise</a>). It is initially null.</p>
      <p>A <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-8">job</a> has a <dfn class="dfn-paneled" data-dfn-for="job" data-dfn-type="dfn" data-noexport="" id="dfn-job-list-of-equivalent-jobs">list of equivalent jobs</dfn> (a list of <a data-link-type="dfn" href="#dfn-job" id="ref-for-dfn-job-9">jobs</a>). It is initially the empty list.</p>
@@ -4325,7 +4331,7 @@ <h3 class="heading settled" id="register-algorithm"><span class="content"><dfn c
         <li data-md="">
          <p>Let <var>newestWorker</var> be the result of running the <a data-link-type="dfn" href="#get-newest-worker" id="ref-for-get-newest-worker-2">Get Newest Worker</a> algorithm passing <var>registration</var> as the argument.</p>
         <li data-md="">
-         <p>If <var>newestWorker</var> is not null, <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-script-url" id="ref-for-dfn-job-script-url-5">script url</a> <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url-equals">equals</a> <var>newestWorker</var>’s <a data-link-type="dfn" href="#dfn-script-url" id="ref-for-dfn-script-url-3">script url</a> with the <em>exclude fragments flag</em> set, and <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-use-cache" id="ref-for-dfn-job-use-cache-2">use cache</a>'s value equals <var>registration</var>’s <a data-link-type="dfn" href="#dfn-use-cache" id="ref-for-dfn-use-cache-3">use cache</a>'s value, then:</p>
+         <p>If <var>newestWorker</var> is not null, <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-script-url" id="ref-for-dfn-job-script-url-5">script url</a> <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url-equals">equals</a> <var>newestWorker</var>’s <a data-link-type="dfn" href="#dfn-script-url" id="ref-for-dfn-script-url-3">script url</a> with the <em>exclude fragments flag</em> set, and <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-update-via-cache-mode" id="ref-for-dfn-job-update-via-cache-mode-2">update via cache mode</a>'s value equals <var>registration</var>’s <a data-link-type="dfn" href="#dfn-update-via-cache" id="ref-for-dfn-update-via-cache-3">update via cache mode</a>'s value, then:</p>
          <ol>
           <li data-md="">
            <p>Invoke <a data-link-type="dfn" href="#resolve-job-promise" id="ref-for-resolve-job-promise-1">Resolve Job Promise</a> with <var>job</var> and the <code class="idl"><a data-link-type="idl" href="#serviceworkerregistration" id="ref-for-serviceworkerregistration-17">ServiceWorkerRegistration</a></code> object which represents <var>registration</var>.</p>
@@ -4337,7 +4343,7 @@ <h3 class="heading settled" id="register-algorithm"><span class="content"><dfn c
        <p>Else:</p>
        <ol>
         <li data-md="">
-         <p>Invoke <a data-link-type="dfn" href="#set-registration" id="ref-for-set-registration-1">Set Registration</a> algorithm with <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-scope-url" id="ref-for-dfn-job-scope-url-7">scope url</a> and <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-use-cache" id="ref-for-dfn-job-use-cache-3">use cache</a>.</p>
+         <p>Invoke <a data-link-type="dfn" href="#set-registration" id="ref-for-set-registration-1">Set Registration</a> algorithm with <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-scope-url" id="ref-for-dfn-job-scope-url-7">scope url</a> and <var>job</var>’s <a data-link-type="dfn" href="#dfn-job-update-via-cache-mode" id="ref-for-dfn-job-update-via-cache-mode-3">update via cache mode</a>.</p>
        </ol>
       <li data-md="">
        <p>Invoke <a data-link-type="dfn" href="#update" id="ref-for-update-2">Update</a> algorithm passing <var>job</var> as the argument.</p>
@@ -4397,7 +4403,7 @@ <h3 class="heading settled" id="update-algorithm"><span class="content"><dfn cla
          <p>Set <var>request</var>’s <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#concept-request-cache-mode">cache mode</a> to "<code>no-cache</code>" if any of the following are true:</p>
          <ul>
           <li data-md="">
-           <p><var>registration</var>’s <a data-link-type="dfn" href="#dfn-use-cache" id="ref-for-dfn-use-cache-4">use cache</a> is false.</p>
+           <p><var>registration</var>’s <a data-link-type="dfn" href="#dfn-update-via-cache" id="ref-for-dfn-update-via-cache-4">update via cache mode</a> is not "<code>all</code>".</p>
           <li data-md="">
            <p><var>job</var>’s <a data-link-type="dfn" href="#dfn-job-force-bypass-cache-flag" id="ref-for-dfn-job-force-bypass-cache-flag-1">force bypass cache flag</a> is set.</p>
           <li data-md="">
@@ -5198,7 +5204,7 @@ <h3 class="heading settled" id="set-registration-algorithm"><span class="content
       <dd data-md="">
        <p><var>scope</var>, a <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url">URL</a></p>
       <dd data-md="">
-       <p><var>useCache</var>, a boolean</p>
+       <p><var>updateViaCache</var>, an <a data-link-type="dfn" href="#dfn-update-via-cache" id="ref-for-dfn-update-via-cache-5">update via cache mode</a></p>
       <dt data-md="">Output
       <dd data-md="">
        <p><var>registration</var>, a <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-57">service worker registration</a></p>
@@ -5209,7 +5215,7 @@ <h3 class="heading settled" id="set-registration-algorithm"><span class="content
       <li data-md="">
        <p>Let <var>scopeString</var> be <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url-serializer">serialized</a> <var>scope</var> with the <em>exclude fragment flag</em> set.</p>
       <li data-md="">
-       <p>Let <var>registration</var> be a new <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-58">service worker registration</a> whose <a data-link-type="dfn" href="#dfn-scope-url" id="ref-for-dfn-scope-url-17">scope url</a> is set to <var>scope</var> and <a data-link-type="dfn" href="#dfn-use-cache" id="ref-for-dfn-use-cache-5">use cache</a> is set to <var>useCache</var>.</p>
+       <p>Let <var>registration</var> be a new <a data-link-type="dfn" href="#dfn-service-worker-registration" id="ref-for-dfn-service-worker-registration-58">service worker registration</a> whose <a data-link-type="dfn" href="#dfn-scope-url" id="ref-for-dfn-scope-url-17">scope url</a> is set to <var>scope</var> and <a data-link-type="dfn" href="#dfn-update-via-cache" id="ref-for-dfn-update-via-cache-6">update via cache mode</a> is set to <var>updateViaCache</var>.</p>
       <li data-md="">
        <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#map-set">Set</a> <a data-link-type="dfn" href="#dfn-scope-to-registration-map" id="ref-for-dfn-scope-to-registration-map-9">scope to registration map</a>[<var>scopeString</var>] to <var>registration</var>.</p>
       <li data-md="">
@@ -5924,8 +5930,18 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
    <li><a href="#dfn-active-worker">active worker</a><span>, in §2.2</span>
    <li><a href="#dom-cache-addall">addAll(requests)</a><span>, in §5.4.4</span>
    <li><a href="#dom-cache-add">add(request)</a><span>, in §5.4.3</span>
-   <li><a href="#dom-clienttype-all">all</a><span>, in §4.3</span>
-   <li><a href="#dom-clienttype-all">"all"</a><span>, in §4.3</span>
+   <li>
+    all
+    <ul>
+     <li><a href="#dom-serviceworkerupdateviacache-all">enum-value for ServiceWorkerUpdateViaCache</a><span>, in §3.2</span>
+     <li><a href="#dom-clienttype-all">enum-value for ClientType</a><span>, in §4.3</span>
+    </ul>
+   <li>
+    "all"
+    <ul>
+     <li><a href="#dom-serviceworkerupdateviacache-all">enum-value for ServiceWorkerUpdateViaCache</a><span>, in §3.2</span>
+     <li><a href="#dom-clienttype-all">enum-value for ClientType</a><span>, in §4.3</span>
+    </ul>
    <li><a href="#dom-windowclient-ancestororigins">ancestorOrigins</a><span>, in §4.2.8</span>
    <li><a href="#windowclient-ancestor-origins-array">ancestor origins array</a><span>, in §4.2</span>
    <li><a href="#batch-cache-operations">Batch Cache Operations</a><span>, in §Unnumbered section</span>
@@ -6020,6 +6036,8 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
    <li><a href="#dom-cachequeryoptions-ignoresearch">ignoreSearch</a><span>, in §5.4</span>
    <li><a href="#dom-cachequeryoptions-ignorevary">ignoreVary</a><span>, in §5.4</span>
    <li><a href="#dfn-imported-scripts-updated-flag">imported scripts updated flag</a><span>, in §2.1</span>
+   <li><a href="#dom-serviceworkerupdateviacache-imports">"imports"</a><span>, in §3.2</span>
+   <li><a href="#dom-serviceworkerupdateviacache-imports">imports</a><span>, in §3.2</span>
    <li><a href="#importscripts-method">importScripts(urls)</a><span>, in §6.3.2</span>
    <li><a href="#dom-clientqueryoptions-includereserved">includeReserved</a><span>, in §4.3</span>
    <li><a href="#dom-clientqueryoptions-includeuncontrolled">includeUncontrolled</a><span>, in §4.3</span>
@@ -6084,6 +6102,8 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
    <li><a href="#dfn-name-to-cache-map">name to cache map</a><span>, in §5.1</span>
    <li><a href="#dom-windowclient-navigate">navigate()</a><span>, in §4.2.10</span>
    <li><a href="#dom-windowclient-navigate">navigate(url)</a><span>, in §4.2</span>
+   <li><a href="#dom-serviceworkerupdateviacache-none">"none"</a><span>, in §3.2</span>
+   <li><a href="#dom-serviceworkerupdateviacache-none">none</a><span>, in §3.2</span>
    <li><a href="#notify-controller-change">Notify Controller Change</a><span>, in §Unnumbered section</span>
    <li><a href="#dom-serviceworkerglobalscope-onactivate">onactivate</a><span>, in §4.1.4</span>
    <li><a href="#dom-serviceworkercontainer-oncontrollerchange">oncontrollerchange</a><span>, in §3.4.7</span>
@@ -6222,6 +6242,7 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
      <li><a href="#serviceworkerregistration-service-worker-registration">dfn for ServiceWorkerRegistration</a><span>, in §3.2</span>
     </ul>
    <li><a href="#enumdef-serviceworkerstate">ServiceWorkerState</a><span>, in §3.1</span>
+   <li><a href="#enumdef-serviceworkerupdateviacache">ServiceWorkerUpdateViaCache</a><span>, in §3.2</span>
    <li><a href="#dfn-set-of-event-types-to-handle">set of event types to handle</a><span>, in §2.1</span>
    <li><a href="#dfn-set-of-extended-events">set of extended events</a><span>, in §2.1</span>
    <li><a href="#set-registration">Set Registration</a><span>, in §Unnumbered section</span>
@@ -6272,20 +6293,20 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
    <li><a href="#service-worker-registration-updatefound-event">updatefound</a><span>, in §3.5</span>
    <li><a href="#update-registration-state">Update Registration State</a><span>, in §Unnumbered section</span>
    <li><a href="#update-service-worker-extended-events-set">Update Service Worker Extended Events Set</a><span>, in §Unnumbered section</span>
-   <li><a href="#update-worker-state">Update Worker State</a><span>, in §Unnumbered section</span>
-   <li><a href="#dom-client-url">url</a><span>, in §4.2.1</span>
    <li>
-    use cache
+    updateViaCache
     <ul>
-     <li><a href="#dfn-use-cache">dfn for service worker registration</a><span>, in §2.2</span>
-     <li><a href="#dfn-job-use-cache">dfn for job</a><span>, in §Unnumbered section</span>
+     <li><a href="#dom-serviceworkerregistration-updateviacache">attribute for ServiceWorkerRegistration</a><span>, in §3.2.5</span>
+     <li><a href="#dom-registrationoptions-updateviacache">dict-member for RegistrationOptions</a><span>, in §3.4</span>
     </ul>
    <li>
-    useCache
+    update via cache mode
     <ul>
-     <li><a href="#dom-serviceworkerregistration-usecache">attribute for ServiceWorkerRegistration</a><span>, in §3.2.5</span>
-     <li><a href="#dom-registrationoptions-usecache">dict-member for RegistrationOptions</a><span>, in §3.4</span>
+     <li><a href="#dfn-update-via-cache">dfn for service worker registration</a><span>, in §2.2</span>
+     <li><a href="#dfn-job-update-via-cache-mode">dfn for job</a><span>, in §Unnumbered section</span>
     </ul>
+   <li><a href="#update-worker-state">Update Worker State</a><span>, in §Unnumbered section</span>
+   <li><a href="#dom-client-url">url</a><span>, in §4.2.1</span>
    <li><a href="#dfn-use">used</a><span>, in §2.4</span>
    <li><a href="#dfn-use">uses</a><span>, in §2.4</span>
    <li><a href="#dfn-use">using</a><span>, in §2.4</span>
@@ -6524,7 +6545,7 @@ <h3 class="no-num no-ref heading settled" id="index-defined-elsewhere"><span cla
      <li><a href="https://infra.spec.whatwg.org/#set-append">append</a>
      <li><a href="https://infra.spec.whatwg.org/#ascii-case-insensitive">ascii case-insensitive</a>
      <li><a href="https://infra.spec.whatwg.org/#list-contain">contain</a>
-     <li><a href="https://infra.spec.whatwg.org/#map-exists">exists</a>
+     <li><a href="https://infra.spec.whatwg.org/#map-exists">exist</a>
      <li><a href="https://infra.spec.whatwg.org/#map-iterate">for each</a>
      <li><a href="https://infra.spec.whatwg.org/#map-getting-the-keys">get the keys</a>
      <li><a href="https://infra.spec.whatwg.org/#list-item">item</a>
@@ -6686,7 +6707,7 @@ <h2 class="no-num no-ref heading settled" id="idl-index"><span class="content">I
   <span class="kt"><span class="kt">readonly</span></span> <span class="kt"><span class="kt">attribute</span></span> <a class="n" data-link-type="idl-name" href="#serviceworker"><span class="n">ServiceWorker</span></a>? <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="ServiceWorker?" href="#dom-serviceworkerregistration-active"><span class="nv">active</span></a>;
 
   <span class="kt"><span class="kt">readonly</span></span> <span class="kt"><span class="kt">attribute</span></span> <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-USVString"><span class="kt"><span class="kt">USVString</span></span></a> <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="USVString" href="#dom-serviceworkerregistration-scope"><span class="nv">scope</span></a>;
-  <span class="kt"><span class="kt">readonly</span></span> <span class="kt"><span class="kt">attribute</span></span> <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-boolean"><span class="kt"><span class="kt">boolean</span></span></a> <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="boolean" href="#dom-serviceworkerregistration-usecache"><span class="nv">useCache</span></a>;
+  <span class="kt"><span class="kt">readonly</span></span> <span class="kt"><span class="kt">attribute</span></span> <a class="n" data-link-type="idl-name" href="#enumdef-serviceworkerupdateviacache"><span class="n">ServiceWorkerUpdateViaCache</span></a> <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="ServiceWorkerUpdateViaCache" href="#dom-serviceworkerregistration-updateviacache"><span class="nv">updateViaCache</span></a>;
 
   [<a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#NewObject"><span class="nv">NewObject</span></a>] <span class="kt"><span class="kt">Promise</span></span>&lt;<span class="kt"><span class="kt">void</span></span>> <a class="nv idl-code" data-link-type="method" href="#dom-serviceworkerregistration-update"><span class="nv">update</span></a>();
   [<a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#NewObject"><span class="nv">NewObject</span></a>] <span class="kt"><span class="kt">Promise</span></span>&lt;<a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-boolean"><span class="kt"><span class="kt">boolean</span></span></a>> <a class="nv idl-code" data-link-type="method" href="#dom-serviceworkerregistration-unregister"><span class="nv">unregister</span></a>();
@@ -6695,6 +6716,12 @@ <h2 class="no-num no-ref heading settled" id="idl-index"><span class="content">I
   <span class="kt"><span class="kt">attribute</span></span> <a class="n" data-link-type="idl-name" href="https://html.spec.whatwg.org/multipage/webappapis.html#eventhandler"><span class="n">EventHandler</span></a> <a class="nv idl-code" data-link-type="attribute" data-type="EventHandler" href="#dom-serviceworkerregistration-onupdatefound"><span class="nv">onupdatefound</span></a>;
 };
 
+<span class="kt"><span class="kt">enum</span></span> <a class="nv" href="#enumdef-serviceworkerupdateviacache"><code><span class="nv">ServiceWorkerUpdateViaCache</span></code></a> {
+  <a class="s" href="#dom-serviceworkerupdateviacache-imports"><code><span class="s">"imports"</span></code></a>,
+  <a class="s" href="#dom-serviceworkerupdateviacache-all"><code><span class="s">"all"</span></code></a>,
+  <a class="s" href="#dom-serviceworkerupdateviacache-none"><code><span class="s">"none"</span></code></a>
+};
+
 <span class="kt"><span class="kt">partial</span></span> <span class="kt"><span class="kt">interface</span></span> <a class="nv idl-code" data-link-type="interface" href="https://html.spec.whatwg.org/multipage/webappapis.html#navigator"><span class="nv">Navigator</span></a> {
   [<a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#SecureContext"><span class="nv">SecureContext</span></a>, <a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#SameObject"><span class="nv">SameObject</span></a>] <span class="kt"><span class="kt">readonly</span></span> <span class="kt"><span class="kt">attribute</span></span> <a class="n" data-link-type="idl-name" href="#serviceworkercontainer"><span class="n">ServiceWorkerContainer</span></a> <a class="nv idl-code" data-link-type="attribute" data-readonly="" data-type="ServiceWorkerContainer" href="#navigator-service-worker-attribute"><span class="nv">serviceWorker</span></a>;
 };
@@ -6725,7 +6752,7 @@ <h2 class="no-num no-ref heading settled" id="idl-index"><span class="content">I
 <span class="kt"><span class="kt">dictionary</span></span> <a class="nv" href="#dictdef-registrationoptions"><code><span class="nv">RegistrationOptions</span></code></a> {
   <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-USVString"><span class="kt"><span class="kt">USVString</span></span></a> <a class="nv" data-type="USVString " href="#dom-registrationoptions-scope"><code><span class="nv">scope</span></code></a>;
   <a class="n" data-link-type="idl-name" href="https://html.spec.whatwg.org/multipage/workers.html#workertype"><span class="n">WorkerType</span></a> <a class="nv" data-default="&quot;classic&quot;" data-type="WorkerType " href="#dom-registrationoptions-type"><code><span class="nv">type</span></code></a> = "classic";
-  <a class="n idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-boolean"><span class="kt"><span class="kt">boolean</span></span></a> <a class="nv" data-default="false" data-type="boolean " href="#dom-registrationoptions-usecache"><code><span class="nv">useCache</span></code></a> = <span class="kt"><span class="kt">false</span></span>;
+  <a class="n" data-link-type="idl-name" href="#enumdef-serviceworkerupdateviacache"><span class="n">ServiceWorkerUpdateViaCache</span></a> <a class="nv" data-default="&quot;imports&quot;" data-type="ServiceWorkerUpdateViaCache " href="#dom-registrationoptions-updateviacache"><code><span class="nv">updateViaCache</span></code></a> = "imports";
 };
 
 [<a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#Global"><span class="nv">Global</span></a>=(<a class="n" data-link-type="idl-name" href="https://html.spec.whatwg.org/multipage/workers.html#worker"><span class="n">Worker</span></a>,<a class="n" data-link-type="idl-name" href="#serviceworker"><span class="n">ServiceWorker</span></a>), <a class="nv idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#Exposed"><span class="nv">Exposed</span></a>=<span class="n"><span class="n">ServiceWorker</span></span>]
@@ -7200,14 +7227,14 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
     <li><a href="#ref-for-dfn-last-update-check-time-11">Handle Functional Event</a> <a href="#ref-for-dfn-last-update-check-time-12">(2)</a>
    </ul>
   </aside>
-  <aside class="dfn-panel" data-for="dfn-use-cache">
-   <b><a href="#dfn-use-cache">#dfn-use-cache</a></b><b>Referenced in:</b>
+  <aside class="dfn-panel" data-for="dfn-update-via-cache">
+   <b><a href="#dfn-update-via-cache">#dfn-update-via-cache</a></b><b>Referenced in:</b>
    <ul>
-    <li><a href="#ref-for-dfn-use-cache-1">3.2.5. useCache</a>
-    <li><a href="#ref-for-dfn-use-cache-2">6.3.2. importScripts(urls)</a>
-    <li><a href="#ref-for-dfn-use-cache-3">Register</a>
-    <li><a href="#ref-for-dfn-use-cache-4">Update</a>
-    <li><a href="#ref-for-dfn-use-cache-5">Set Registration</a>
+    <li><a href="#ref-for-dfn-update-via-cache-1">3.2.5. updateViaCache</a>
+    <li><a href="#ref-for-dfn-update-via-cache-2">6.3.2. importScripts(urls)</a>
+    <li><a href="#ref-for-dfn-update-via-cache-3">Register</a>
+    <li><a href="#ref-for-dfn-update-via-cache-4">Update</a>
+    <li><a href="#ref-for-dfn-update-via-cache-5">Set Registration</a> <a href="#ref-for-dfn-update-via-cache-6">(2)</a>
    </ul>
   </aside>
   <aside class="dfn-panel" data-for="dfn-uninstalling-flag">
@@ -7461,11 +7488,18 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
     <li><a href="#ref-for-serviceworkerregistration-21">Update Registration State</a>
    </ul>
   </aside>
+  <aside class="dfn-panel" data-for="enumdef-serviceworkerupdateviacache">
+   <b><a href="#enumdef-serviceworkerupdateviacache">#enumdef-serviceworkerupdateviacache</a></b><b>Referenced in:</b>
+   <ul>
+    <li><a href="#ref-for-enumdef-serviceworkerupdateviacache-1">3.2. ServiceWorkerRegistration</a>
+    <li><a href="#ref-for-enumdef-serviceworkerupdateviacache-2">3.4. ServiceWorkerContainer</a>
+   </ul>
+  </aside>
   <aside class="dfn-panel" data-for="serviceworkerregistration-service-worker-registration">
    <b><a href="#serviceworkerregistration-service-worker-registration">#serviceworkerregistration-service-worker-registration</a></b><b>Referenced in:</b>
    <ul>
     <li><a href="#ref-for-serviceworkerregistration-service-worker-registration-1">3.2.4. scope</a>
-    <li><a href="#ref-for-serviceworkerregistration-service-worker-registration-2">3.2.5. useCache</a>
+    <li><a href="#ref-for-serviceworkerregistration-service-worker-registration-2">3.2.5. updateViaCache</a>
     <li><a href="#ref-for-serviceworkerregistration-service-worker-registration-3">3.2.6. update()</a>
     <li><a href="#ref-for-serviceworkerregistration-service-worker-registration-4">3.2.7. unregister()</a>
     <li><a href="#ref-for-serviceworkerregistration-service-worker-registration-5">3.5. Events</a>
@@ -7502,11 +7536,11 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
     <li><a href="#ref-for-dom-serviceworkerregistration-scope-2">3.2.4. scope</a>
    </ul>
   </aside>
-  <aside class="dfn-panel" data-for="dom-serviceworkerregistration-usecache">
-   <b><a href="#dom-serviceworkerregistration-usecache">#dom-serviceworkerregistration-usecache</a></b><b>Referenced in:</b>
+  <aside class="dfn-panel" data-for="dom-serviceworkerregistration-updateviacache">
+   <b><a href="#dom-serviceworkerregistration-updateviacache">#dom-serviceworkerregistration-updateviacache</a></b><b>Referenced in:</b>
    <ul>
-    <li><a href="#ref-for-dom-serviceworkerregistration-usecache-1">3.2. ServiceWorkerRegistration</a>
-    <li><a href="#ref-for-dom-serviceworkerregistration-usecache-2">3.2.5. useCache</a>
+    <li><a href="#ref-for-dom-serviceworkerregistration-updateviacache-1">3.2. ServiceWorkerRegistration</a>
+    <li><a href="#ref-for-dom-serviceworkerregistration-updateviacache-2">3.2.5. updateViaCache</a>
    </ul>
   </aside>
   <aside class="dfn-panel" data-for="dom-serviceworkerregistration-update">
@@ -7564,10 +7598,10 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
     <li><a href="#ref-for-dom-registrationoptions-type-1">3.4.3. register(scriptURL, options)</a>
    </ul>
   </aside>
-  <aside class="dfn-panel" data-for="dom-registrationoptions-usecache">
-   <b><a href="#dom-registrationoptions-usecache">#dom-registrationoptions-usecache</a></b><b>Referenced in:</b>
+  <aside class="dfn-panel" data-for="dom-registrationoptions-updateviacache">
+   <b><a href="#dom-registrationoptions-updateviacache">#dom-registrationoptions-updateviacache</a></b><b>Referenced in:</b>
    <ul>
-    <li><a href="#ref-for-dom-registrationoptions-usecache-1">3.4.3. register(scriptURL, options)</a>
+    <li><a href="#ref-for-dom-registrationoptions-updateviacache-1">3.4.3. register(scriptURL, options)</a>
    </ul>
   </aside>
   <aside class="dfn-panel" data-for="serviceworkercontainer-service-worker-client">
@@ -8562,11 +8596,11 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
     <li><a href="#ref-for-dfn-job-worker-type-5">Soft Update</a>
    </ul>
   </aside>
-  <aside class="dfn-panel" data-for="dfn-job-use-cache">
-   <b><a href="#dfn-job-use-cache">#dfn-job-use-cache</a></b><b>Referenced in:</b>
+  <aside class="dfn-panel" data-for="dfn-job-update-via-cache-mode">
+   <b><a href="#dfn-job-update-via-cache-mode">#dfn-job-update-via-cache-mode</a></b><b>Referenced in:</b>
    <ul>
-    <li><a href="#ref-for-dfn-job-use-cache-1">3.4.3. register(scriptURL, options)</a>
-    <li><a href="#ref-for-dfn-job-use-cache-2">Register</a> <a href="#ref-for-dfn-job-use-cache-3">(2)</a>
+    <li><a href="#ref-for-dfn-job-update-via-cache-mode-1">3.4.3. register(scriptURL, options)</a>
+    <li><a href="#ref-for-dfn-job-update-via-cache-mode-2">Register</a> <a href="#ref-for-dfn-job-update-via-cache-mode-3">(2)</a>
    </ul>
   </aside>
   <aside class="dfn-panel" data-for="dfn-job-client">