background-fetch.https.html

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<!DOCTYPE html>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/speculation-rules/prerender/resources/utils.js"></script>

<script src="/speculation-rules/prerender/resources/deferred-promise-utils.js"></script>

<script>

// The main test page (restriction-background-fetch.https.html) loads the

// initiator page, then the initiator page will prerender itself with the

// `prerendering` parameter.

const params = new URLSearchParams(location.search);

const isPrerendering = params.has('prerendering');

if (!isPrerendering) {

  const rule_extras = {'target_hint': getTargetHint()};

  loadInitiatorPage(rule_extras);

} else {

  async function loadPrerenderPage() {

    const prerenderEventCollector = new PrerenderEventCollector();

    const scope = `resources/`;

    const registration = await navigator.serviceWorker.getRegistration(scope);

    const fetch_promise = registration.backgroundFetch.fetch(

            'my-fetch', '/', {icons: [{src: '/'}]});

    prerenderEventCollector.start(fetch_promise, 'backgroundFetch.fetch');

  loadPrerenderPage();

</script>