33 lines
907 B
JavaScript
33 lines
907 B
JavaScript
// META: script=/resources/WebIDLParser.js
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// META: script=/resources/idlharness.js
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// https://w3c.github.io/longtasks/
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'use strict';
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idl_test(
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['longtasks'],
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['performance-timeline', 'hr-time'],
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(idl_array, t) => new Promise((resolve, reject) => {
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const longTask = () => {
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const begin = self.performance.now();
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while (self.performance.now() < begin + 100);
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}
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t.step_timeout(longTask, 0);
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const observer = new PerformanceObserver((entryList, observer) => {
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const entries = Array.from(entryList.getEntries());
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idl_array.add_objects({
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PerformanceLongTaskTiming: entries.slice(0, 1),
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TaskAttributionTiming: entries[0].attribution,
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});
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observer.disconnect();
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resolve();
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});
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observer.observe({entryTypes: ['longtask']});
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t.step_timeout(() => {
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reject('longtask entry was not observed');
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}, 1000);
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})
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);
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