28 lines
1,008 B
HTML
28 lines
1,008 B
HTML
<!DOCTYPE HTML>
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<meta charset=utf-8>
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<title>LongTask Timing: synchronous XHR</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 Task: synchronous XHR</h1>
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<div id="log"></div>
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<script>
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setup(() => assert_implements(window.PerformanceLongTaskTiming, 'Longtasks are not supported.'));
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promise_test(async t => {
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const receivedLongTask = new Promise(resolve =>
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new PerformanceObserver(entries => resolve(entries.getEntries())).observe({entryTypes: ['longtask']}));
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await new Promise(resolve => window.addEventListener('load', () => {
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const xhr = new XMLHttpRequest();
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xhr.open('GET', '/resource-timing/resources/delay-css.py?delay=100', false /* synchronous xhr */);
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xhr.send();
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resolve();
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}));
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const entries = await receivedLongTask;
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assert_equals(entries.length, 1);
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}, 'A long synchronous XHR is a longtask');
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</script>
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</body>
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