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<!doctype html>
<title>Scheduler: yield in Detached Scheduler</title>
<link rel="help" href="https://github.com/WICG/scheduling-apis">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
'use strict';
promise_test(async t => {
await new Promise(resolve => window.onload = resolve);
const frame = document.body.appendChild(document.createElement('iframe'));
const iframeDOMException = frame.contentWindow.DOMException;
const iframeScheduler = frame.contentWindow.scheduler;
let didRun = false;
iframeScheduler.yield().then(() => { didRun = true; });
document.body.removeChild(frame);
await promise_rejects_dom(t, 'NotSupportedError', iframeDOMException, iframeScheduler.yield());
await new Promise(resolve => t.step_timeout(resolve, 10));
assert_false(didRun, 'The continuation should not have run.');
}, 'Test scheduler.yield() from an iframe that is removed');
</script>
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