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<!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>
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