testing/web-platform/tests/scheduler/post-task-with-signal-from-detached-iframe.html

   1 <!doctype html>
   2 <title>Scheduler: postTask with Detached Frame's Signal</title>
   3 <link rel="author" title="Nate Chapin" href="mailto:japhet@chromium.org">
   4 <link rel="help" href="https://github.com/WICG/scheduling-apis">
   5 <script src="/resources/testharness.js"></script>
   6 <script src="/resources/testharnessreport.js"></script>
   7
   8 <script>
   9 'use strict';
  10
  11 promise_test(async t => {
  12   await new Promise((resolve) => {
  13     window.addEventListener('load', resolve);
  14   });
  15
  16   const frame = document.createElement('iframe');
  17   frame.srcdoc = `
  18     <script>
  19       const controller = new TaskController();
  20       window.childFrameSignal = controller.signal;
  21     <\/script>`
  22   await new Promise((resolve) => {
  23     frame.addEventListener('load', resolve)
  24     document.body.appendChild(frame);
  25   });
  26
  27   const signal = frame.contentWindow.childFrameSignal;
  28   document.body.removeChild(frame);
  29   return scheduler.postTask(() => {}, {signal});
  30 }, 'Test scheduler.postTask() with a signal from a detached iframe');
  31
  32 </script>