| <!doctype html> |
| <title>cancelAnimationFrame cancels a pending animation frame callback</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <link rel="help" href="https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#run-the-animation-frame-callbacks"> |
| <div id="log"></div> |
| <script> |
| async_test(t => { |
| let didCall = false; |
| |
| function callbackOne() { |
| cancelAnimationFrame(twoHandle); |
| requestAnimationFrame(t.step_func(() => { |
| assert_false(didCall, 'Should NOT have called the second callback'); |
| t.done(); |
| })); |
| } |
| |
| function callbackTwo() { |
| didCall = true; |
| } |
| |
| requestAnimationFrame(callbackOne); |
| const twoHandle = requestAnimationFrame(callbackTwo); |
| }, 'cancelAnimationFrame cancels a pending animation frame callback'); |
| </script> |