Content - 2e7a9990dd059b6b4142636c58c884431b74f878 - e5b3c48/longtask-timing/longtask-in-parentiframe.html

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Tip revision: 4f05c011be2ef38886088a09748b90dd2476d40f authored by Mugdha Lakhani on 18 October 2018, 15:50:21 UTC
[Background Fetch] Support access to active fetches.

Tip revision: 4f05c01

longtask-in-parentiframe.html

<!DOCTYPE HTML>
<meta charset=utf-8>
<title>LongTask Timing: long task in nested child iframe</title>
<body>

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

<script>
  const t = async_test(t => {
    if (typeof PerformanceLongTaskTiming === 'undefined') {
        assert_unreached("Longtasks are not supported.");
        t.done();
    }
    window.addEventListener('message', t.step_func(e => {
      assert_equals(e.data['entryType'], 'longtask');
      assert_equals(e.data['frame-attribution'], 'same-origin-ancestor');
      assert_equals(e.data['task-attribution'], 'script');
      assert_equals(e.data['containerId'], '');
      assert_equals(e.data['containerName'], '');
      assert_equals(e.data['containerSrc'], '');
      t.done();
    }));
  }, 'Performance longtask entries in parent are observable in child iframe.');

  const iframe = document.createElement('iframe');
  iframe.id = 'child-iframe-id';
  iframe.name = 'child-iframe-name';
  document.body.appendChild(iframe);
  iframe.src = 'resources/subframe-observing-longtask.html';
  iframe.onload = () => {
    t.step_timeout( () => {
      const begin = window.performance.now();
      while (window.performance.now() < begin + 60);
    }, 50);
  };
</script>

</body>

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