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<!DOCTYPE html>
<title>Cancel non accelerated property using worklet animation</title>
<link rel="help" href="https://drafts.css-houdini.org/css-animationworklet/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/web-animations/testcommon.js"></script>
<script src="common.js"></script>
<style>
#target {
background-color: red;
}
</style>
<div id="target"></div>
<script>
promise_test(async t => {
await registerConstantLocalTimeAnimator(1000);
const target = document.getElementById('target');
const effect = new KeyframeEffect(
target,
[
{ background: 'green' },
{ background: 'blue' },
],
{
duration: 2000,
iteration: Infinity
}
);
const animation = new WorkletAnimation('constant_time', effect);
animation.play();
await waitForAsyncAnimationFrames(1);
// establish that the animation started
assert_equals(getComputedStyle(target).backgroundColor, "rgb(0, 64, 128)");
animation.cancel();
await waitForAsyncAnimationFrames(1);
// confirm the animation is cancelled
assert_equals(getComputedStyle(target).backgroundColor, "rgb(255, 0, 0)");
}, "Animation should update the outputs after starting and then return to pre-animated values after being cancelled");
</script>
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