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| Current File : //home/ubuntu/node-v16.18.1/test/fixtures/wpt/hr-time/navigation-start-post-before-unload.html |
<!doctype html>
<html>
<head>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<script>
function busyWait(millis) {
const start = performance.now();
while (performance.now() < start + millis) {}
}
promise_test(async t => {
const delay = 3000;
const iframe = document.createElement('iframe');
iframe.src = './resources/now_frame.html';
document.body.appendChild(iframe);
await new Promise(resolve => iframe.addEventListener('load', resolve));
iframe.contentWindow.addEventListener('beforeunload', () => {
busyWait(delay);
});
iframe.src = './resources/post.html';
await new Promise(resolve => this.addEventListener('message', ({data}) => {
if (data === 'done')
resolve();
}));
const entry = iframe.contentWindow.performance.getEntriesByType('navigation')[0];
assert_less_than(entry.fetchStart, delay);
}, 'timeOrigin should be set after beforeunload');
</script>
</body>
</html>
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