Fix: Ensure timingInfo is returned on network fallback if SW static routing API is used (#1774)

SHA: ef029c5
Reason: push, by yoshisatoyanagisawa

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: yoshisatoyanagisawa

docs/index.html

@@ -7,7 +7,7 @@
   <link href="https://www.w3.org/StyleSheets/TR/2021/W3C-ED" rel="stylesheet">
   <meta content="Bikeshed version 9a7a6709a, updated Tue May 27 16:45:34 2025 -0700" name="generator">
   <link href="https://www.w3.org/TR/service-workers/" rel="canonical">
-  <meta content="2c732f5fcc0635f68c34192cd246141a4779b9ca" name="revision">
+  <meta content="ef029c5bb511f2cce0e1bec146fc597460fbe961" name="revision">
   <meta content="dark light" name="color-scheme">
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 <style>/* Boilerplate: style-autolinks */
@@ -5467,10 +5467,20 @@ <h3 class="heading settled" id="on-fetch-request-algorithm"><span class="content
       <li data-md>
        <p>Let <var>fetchResult</var> be the result of <a data-link-type="dfn" href="#create-fetch-event-and-dispatch" id="ref-for-create-fetch-event-and-dispatch①">Create Fetch Event and Dispatch</a> with <var>request</var>, <var>registration</var>, <var>useHighResPerformanceTimers</var>, <var>timingInfo</var>, <var>workerRealm</var>, <var>reservedClient</var>, <var>preloadResponse</var>, and null.</p>
       <li data-md>
-       <p>If <var>fetchResult</var> is not null and <var>fetchResult</var>’s <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#response-service-worker-timing-info" id="ref-for-response-service-worker-timing-info">service worker timing info</a>’s <a data-link-type="dfn" href="#service-worker-timing-info-worker-final-router-source" id="ref-for-service-worker-timing-info-worker-final-router-source③">worker final router source</a> is set to <code class="idl"><a data-link-type="idl" href="#dom-routersourceenum-network" id="ref-for-dom-routersourceenum-network④">"network"</a></code>:</p>
+       <p>If <var>timingInfo</var>’s <a data-link-type="dfn" href="#service-worker-timing-info-worker-final-router-source" id="ref-for-service-worker-timing-info-worker-final-router-source③">worker final router source</a> is not an empty string:</p>
        <ol>
         <li data-md>
-         <p>Set <var>fetchResult</var>’s <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#response-service-worker-timing-info" id="ref-for-response-service-worker-timing-info①">service worker timing info</a>’s <a data-link-type="dfn" href="#service-worker-timing-info-worker-final-router-source" id="ref-for-service-worker-timing-info-worker-final-router-source④">worker final router source</a> to <code class="idl"><a data-link-type="idl" href="#dom-routersourceenum-fetch-event" id="ref-for-dom-routersourceenum-fetch-event③">"fetch-event"</a></code>.</p>
+         <p>Assert <var>timingInfo</var>’s <a data-link-type="dfn" href="#service-worker-timing-info-worker-final-router-source" id="ref-for-service-worker-timing-info-worker-final-router-source④">worker final router source</a> is <code class="idl"><a data-link-type="idl" href="#dom-routersourceenum-network" id="ref-for-dom-routersourceenum-network④">"network"</a></code>.</p>
+        <li data-md>
+         <p>If <var>fetchResult</var> is null, then return <var>timingInfo</var>.</p>
+        <li data-md>
+         <p>Else:</p>
+         <ol>
+          <li data-md>
+           <p>Assert <var>fetchResult</var>’s <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#response-service-worker-timing-info" id="ref-for-response-service-worker-timing-info">service worker timing info</a>’s <a data-link-type="dfn" href="#service-worker-timing-info-worker-final-router-source" id="ref-for-service-worker-timing-info-worker-final-router-source⑤">worker final router source</a> is <code class="idl"><a data-link-type="idl" href="#dom-routersourceenum-network" id="ref-for-dom-routersourceenum-network⑤">"network"</a></code>.</p>
+          <li data-md>
+           <p>Set <var>fetchResult</var>’s <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#response-service-worker-timing-info" id="ref-for-response-service-worker-timing-info①">service worker timing info</a>’s <a data-link-type="dfn" href="#service-worker-timing-info-worker-final-router-source" id="ref-for-service-worker-timing-info-worker-final-router-source⑥">worker final router source</a> to <code class="idl"><a data-link-type="idl" href="#dom-routersourceenum-fetch-event" id="ref-for-dom-routersourceenum-fetch-event③">"fetch-event"</a></code>.</p>
+         </ol>
        </ol>
       <li data-md>
        <p>Return <var>fetchResult</var>.</p>
@@ -10696,7 +10706,7 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
 "dom-routersourcedict-cachename": {"dfnID":"dom-routersourcedict-cachename","dfnText":"cacheName","external":false,"refSections":[{"refs":[{"id":"ref-for-dom-routersourcedict-cachename"},{"id":"ref-for-dom-routersourcedict-cachename\u2460"},{"id":"ref-for-dom-routersourcedict-cachename\u2461"}],"title":"Handle Fetch"}],"url":"#dom-routersourcedict-cachename"},
 "dom-routersourceenum-cache": {"dfnID":"dom-routersourceenum-cache","dfnText":"\"cache\"","external":false,"refSections":[{"refs":[{"id":"ref-for-dom-routersourceenum-cache"},{"id":"ref-for-dom-routersourceenum-cache\u2460"}],"title":"Handle Fetch"}],"url":"#dom-routersourceenum-cache"},
 "dom-routersourceenum-fetch-event": {"dfnID":"dom-routersourceenum-fetch-event","dfnText":"\"fetch-event\"","external":false,"refSections":[{"refs":[{"id":"ref-for-dom-routersourceenum-fetch-event"}],"title":"4.5.1. event.addRoutes(rules)"},{"refs":[{"id":"ref-for-dom-routersourceenum-fetch-event\u2460"},{"id":"ref-for-dom-routersourceenum-fetch-event\u2461"},{"id":"ref-for-dom-routersourceenum-fetch-event\u2462"}],"title":"Handle Fetch"}],"url":"#dom-routersourceenum-fetch-event"},
-"dom-routersourceenum-network": {"dfnID":"dom-routersourceenum-network","dfnText":"\"network\"","external":false,"refSections":[{"refs":[{"id":"ref-for-dom-routersourceenum-network"},{"id":"ref-for-dom-routersourceenum-network\u2460"},{"id":"ref-for-dom-routersourceenum-network\u2461"},{"id":"ref-for-dom-routersourceenum-network\u2462"},{"id":"ref-for-dom-routersourceenum-network\u2463"}],"title":"Handle Fetch"}],"url":"#dom-routersourceenum-network"},
+"dom-routersourceenum-network": {"dfnID":"dom-routersourceenum-network","dfnText":"\"network\"","external":false,"refSections":[{"refs":[{"id":"ref-for-dom-routersourceenum-network"},{"id":"ref-for-dom-routersourceenum-network\u2460"},{"id":"ref-for-dom-routersourceenum-network\u2461"},{"id":"ref-for-dom-routersourceenum-network\u2462"},{"id":"ref-for-dom-routersourceenum-network\u2463"},{"id":"ref-for-dom-routersourceenum-network\u2464"}],"title":"Handle Fetch"}],"url":"#dom-routersourceenum-network"},
 "dom-routersourceenum-race-network-and-fetch-handler": {"dfnID":"dom-routersourceenum-race-network-and-fetch-handler","dfnText":"\"race-network-and-fetch-handler\"","external":false,"refSections":[{"refs":[{"id":"ref-for-dom-routersourceenum-race-network-and-fetch-handler"}],"title":"4.1. ServiceWorkerGlobalScope"},{"refs":[{"id":"ref-for-dom-routersourceenum-race-network-and-fetch-handler\u2460"}],"title":"4.5.1. event.addRoutes(rules)"},{"refs":[{"id":"ref-for-dom-routersourceenum-race-network-and-fetch-handler\u2461"}],"title":"Handle Fetch"}],"url":"#dom-routersourceenum-race-network-and-fetch-handler"},
 "dom-runningstatus-not-running": {"dfnID":"dom-runningstatus-not-running","dfnText":"\"not-running\"","external":false,"refSections":[{"refs":[{"id":"ref-for-dom-runningstatus-not-running"}],"title":"Match Router Condition"}],"url":"#dom-runningstatus-not-running"},
 "dom-runningstatus-running": {"dfnID":"dom-runningstatus-running","dfnText":"\"running\"","external":false,"refSections":[{"refs":[{"id":"ref-for-dom-runningstatus-running"}],"title":"Match Router Condition"}],"url":"#dom-runningstatus-running"},
@@ -10880,7 +10890,7 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
 "service-worker-timing-info-fetch-event-dispatch-time": {"dfnID":"service-worker-timing-info-fetch-event-dispatch-time","dfnText":"fetch event dispatch time","external":false,"refSections":[{"refs":[{"id":"ref-for-service-worker-timing-info-fetch-event-dispatch-time"}],"title":"Create Fetch Event and Dispatch"}],"url":"#service-worker-timing-info-fetch-event-dispatch-time"},
 "service-worker-timing-info-start-time": {"dfnID":"service-worker-timing-info-start-time","dfnText":"start time","external":false,"refSections":[{"refs":[{"id":"ref-for-service-worker-timing-info-start-time"}],"title":"Create Fetch Event and Dispatch"}],"url":"#service-worker-timing-info-start-time"},
 "service-worker-timing-info-worker-cache-lookup-start": {"dfnID":"service-worker-timing-info-worker-cache-lookup-start","dfnText":"worker cache lookup start","external":false,"refSections":[{"refs":[{"id":"ref-for-service-worker-timing-info-worker-cache-lookup-start"}],"title":"Handle Fetch"}],"url":"#service-worker-timing-info-worker-cache-lookup-start"},
-"service-worker-timing-info-worker-final-router-source": {"dfnID":"service-worker-timing-info-worker-final-router-source","dfnText":"worker final router source","external":false,"refSections":[{"refs":[{"id":"ref-for-service-worker-timing-info-worker-final-router-source"},{"id":"ref-for-service-worker-timing-info-worker-final-router-source\u2460"},{"id":"ref-for-service-worker-timing-info-worker-final-router-source\u2461"},{"id":"ref-for-service-worker-timing-info-worker-final-router-source\u2462"},{"id":"ref-for-service-worker-timing-info-worker-final-router-source\u2463"}],"title":"Handle Fetch"}],"url":"#service-worker-timing-info-worker-final-router-source"},
+"service-worker-timing-info-worker-final-router-source": {"dfnID":"service-worker-timing-info-worker-final-router-source","dfnText":"worker final router source","external":false,"refSections":[{"refs":[{"id":"ref-for-service-worker-timing-info-worker-final-router-source"},{"id":"ref-for-service-worker-timing-info-worker-final-router-source\u2460"},{"id":"ref-for-service-worker-timing-info-worker-final-router-source\u2461"},{"id":"ref-for-service-worker-timing-info-worker-final-router-source\u2462"},{"id":"ref-for-service-worker-timing-info-worker-final-router-source\u2463"},{"id":"ref-for-service-worker-timing-info-worker-final-router-source\u2464"},{"id":"ref-for-service-worker-timing-info-worker-final-router-source\u2465"}],"title":"Handle Fetch"}],"url":"#service-worker-timing-info-worker-final-router-source"},
 "service-worker-timing-info-worker-matched-router-source": {"dfnID":"service-worker-timing-info-worker-matched-router-source","dfnText":"worker matched router source","external":false,"refSections":[{"refs":[{"id":"ref-for-service-worker-timing-info-worker-matched-router-source"}],"title":"Handle Fetch"}],"url":"#service-worker-timing-info-worker-matched-router-source"},
 "service-worker-timing-info-worker-router-evaluation-start": {"dfnID":"service-worker-timing-info-worker-router-evaluation-start","dfnText":"worker router evaluation start","external":false,"refSections":[{"refs":[{"id":"ref-for-service-worker-timing-info-worker-router-evaluation-start"}],"title":"Handle Fetch"}],"url":"#service-worker-timing-info-worker-router-evaluation-start"},
 "serviceworker": {"dfnID":"serviceworker","dfnText":"ServiceWorker","external":false,"refSections":[{"refs":[{"id":"ref-for-serviceworker"}],"title":"2.1.1. Lifetime"},{"refs":[{"id":"ref-for-serviceworker\u2460"},{"id":"ref-for-serviceworker\u2461"},{"id":"ref-for-serviceworker\u2462"},{"id":"ref-for-serviceworker\u2463"},{"id":"ref-for-serviceworker\u2464"},{"id":"ref-for-serviceworker\u2465"}],"title":"3.1. ServiceWorker"},{"refs":[{"id":"ref-for-serviceworker\u2466"},{"id":"ref-for-serviceworker\u2467"},{"id":"ref-for-serviceworker\u2468"}],"title":"3.1.1. Getting ServiceWorker instances"},{"refs":[{"id":"ref-for-serviceworker\u2460\u24ea"}],"title":"3.1.6. Event handler"},{"refs":[{"id":"ref-for-serviceworker\u2460\u2460"},{"id":"ref-for-serviceworker\u2460\u2461"},{"id":"ref-for-serviceworker\u2460\u2462"}],"title":"3.2. ServiceWorkerRegistration"},{"refs":[{"id":"ref-for-serviceworker\u2460\u2463"}],"title":"3.2.2. installing"},{"refs":[{"id":"ref-for-serviceworker\u2460\u2464"}],"title":"3.2.3. waiting"},{"refs":[{"id":"ref-for-serviceworker\u2460\u2465"}],"title":"3.2.4. active"},{"refs":[{"id":"ref-for-serviceworker\u2460\u2466"}],"title":"3.4. ServiceWorkerContainer"},{"refs":[{"id":"ref-for-serviceworker\u2460\u2467"},{"id":"ref-for-serviceworker\u2460\u2468"}],"title":"3.5. Events"},{"refs":[{"id":"ref-for-serviceworker\u2461\u24ea"},{"id":"ref-for-serviceworker\u2461\u2460"}],"title":"4.1. ServiceWorkerGlobalScope"},{"refs":[{"id":"ref-for-serviceworker\u2461\u2461"},{"id":"ref-for-serviceworker\u2461\u2462"}],"title":"4.7. ExtendableMessageEvent"}],"url":"#serviceworker"},