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35 lines
1.1 KiB
HTML
35 lines
1.1 KiB
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>
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const t = async_test(t => {
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window.addEventListener('message', t.step_func(e => {
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assert_equals(e.data['entryType'], 'longtask');
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assert_equals(e.data['frame-attribution'], 'same-origin-ancestor');
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assert_equals(e.data['task-attribution'], 'script');
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assert_equals(e.data['containerId'], '');
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assert_equals(e.data['containerName'], '');
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assert_equals(e.data['containerSrc'], '');
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t.done();
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}));
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}, 'Performance longtask entries in parent are observable in child iframe.');
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const iframe = document.createElement('iframe');
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iframe.onload = function() {
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t.step_timeout(function(){
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const begin = window.performance.now();
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while (window.performance.now() < begin + 51);
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}, 50);
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}
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iframe.id = 'child-iframe-id';
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iframe.name = 'child-iframe-name';
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document.body.appendChild(iframe);
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iframe.src = 'resources/subframe-observing-longtask.html';
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</script>
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</body>
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