order-in-prerender-activation.html

Enable keyboard shortcuts

This WPT test may be referenced by the following Test IDs:
- /html/browsers/browsing-the-web/history-traversal/pagereveal/order-in-prerender-activation.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>pagereveal event fires and in correct order on prerender activation</title>

<link rel="help" href="https://html.spec.whatwg.org/multipage/webappapis.html#update-the-rendering">

<link rel="author" href="mailto:bokan@chromium.org">

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

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

<script src="/common/utils.js"></script>

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

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

<script>

setup(() => assertSpeculationRulesIsSupported());

const uid = token();

const initiator_url = `resources/order-in-prerender-activation-popup.html?uid=${uid}`;

// This test opens a popup to an initiator page. That page then prerenders a

// "prerendering" version of itself (by adding a `prerendering` query param)

// and navigates itself to activate the prerender. The results are recorded and

// sent back to this test harness.

promise_test(async () => {

  const channel = new PrerenderChannel('result', uid);

  const test_done = new Promise(resolve => {

     channel.addEventListener('message', e => resolve(e.data), { once: true });

});

  window.open(initiator_url, '_blank', 'noopener');

  const result = await test_done;

  if (result.hasOwnProperty('fail')) {

    assert_unreached(result.fail);

  // The test records relevant event occurrences up to the second animation

  // frame. Ensure their order and apparance is as expected.

  const events_in_order = result.events.join(',');

  assert_equals(events_in_order,

      'pageshow,prerenderingchange,pagereveal,raf');

});

</script>