File: post-task-with-signal-from-detached-iframe.html

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<!doctype html>
<title>Scheduler: postTask with Detached Frame's Signal</title>
<link rel="author" title="Nate Chapin" href="mailto:japhet@chromium.org">
<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.addEventListener('load', resolve);
  });

  const frame = document.createElement('iframe');
  frame.srcdoc = `
    <script>
      const controller = new TaskController();
      window.childFrameSignal = controller.signal;
    <\/script>`
  await new Promise((resolve) => {
    frame.addEventListener('load', resolve)
    document.body.appendChild(frame);
  });

  const signal = frame.contentWindow.childFrameSignal;
  document.body.removeChild(frame);
  return scheduler.postTask(() => {}, {signal});
}, 'Test scheduler.postTask() with a signal from a detached iframe');

</script>