25 lines
750 B
HTML
25 lines
750 B
HTML
<!DOCTYPE HTML>
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<meta charset=utf-8>
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<title>LongTask Timing: long task in nested child iframe</title>
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<body>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="resources/utils.js"></script>
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<h1>Long Tasks with detached iframe</h1>
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<div id="log"></div>
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<script>
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promise_test(async t => {
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assert_implements(window.PerformanceLongTaskTiming, 'Longtasks are not supported.');
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const iframe = document.createElement("iframe");
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document.body.appendChild(iframe);
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t.add_cleanup(() => iframe.remove());
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t.step_timeout(() => {
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busyWait();
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iframe.remove();
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});
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}, 'Performance longtask entries dont crash when a frame is detached.');
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</script>
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</body>
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