request-animation-frame-cancel2.html

<!DOCTYPE html>
<title>Tests one requestAnimationFrame callback cancelling a second</title>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>

<script>
  async_test(t => {
    var secondCallbackId;
    var callbackFired = false;
    var cancelFired = false;

    window.requestAnimationFrame(function() {
      cancelFired = true;
      window.cancelAnimationFrame(secondCallbackId);
    });

    secondCallbackId = window.requestAnimationFrame(function() {
      callbackFired = true;
    });

    requestAnimationFrame(function() {
      t.step(function() {
        assert_false(callbackFired);
        assert_true(cancelFired);
      });
      t.done();
    });
  }, "Test cancelling a rAF callback from within a second");
</script>

chromium/third_party/blink/web_tests/fast/animation/request-animation-frame-cancel2.html