32 lines
1.3 KiB
HTML
32 lines
1.3 KiB
HTML
<!DOCTYPE HTML>
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<meta charset=utf-8>
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<title>Element Timing: observe video poster image</title>
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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/element-timing-helpers.js"></script>
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<script>
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let beforeRender;
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async_test(function (t) {
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assert_implements(window.PerformanceElementTiming, "PerformanceElementTiming is not implemented");
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const observer = new PerformanceObserver(
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t.step_func_done(function(entryList) {
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assert_equals(entryList.getEntries().length, 1);
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const entry = entryList.getEntries()[0];
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const pathname = window.location.origin + '/element-timing/resources/circle.svg';
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checkElement(entry, pathname, 'my_poster', 'the_poster', beforeRender,
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document.getElementById('the_poster'));
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// Assume viewport has size at least 200, so the element is fully visible.
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checkRect(entry, [0, 200, 0, 200]);
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checkNaturalSize(entry, 200, 200);
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})
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);
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observer.observe({entryTypes: ['element']});
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beforeRender = performance.now();
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}, "Able to observe a video's poster image.");
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</script>
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<style>
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body {
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margin: 0;
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}
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</style>
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<video elementtiming='my_poster' id='the_poster' src='/media/test.mp4' poster='resources/circle.svg'></video>
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