longtask-detach-frame.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /longtask-timing/longtask-detach-frame.html - WPT Dashboard Interop Dashboard

<!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 src="resources/utils.js"></script>

<h1>Long Tasks with detached iframe</h1>

<div id="log"></div>

<script>

  promise_test(async t => {

    assert_implements(window.PerformanceLongTaskTiming, 'Longtasks are not supported.');

    const iframe = document.createElement("iframe");

    document.body.appendChild(iframe);

    t.add_cleanup(() => iframe.remove());

    t.step_timeout(() => {

      busyWait();

      iframe.remove();

});

}, 'Performance longtask entries dont crash when a frame is detached.');

</script>

</body>