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Test Info:

<html class="reftest-wait">
<title>Canceling a playing WorkletAnimation should remove the effect</title>
<meta name="assert" content="Canceling a playing animation should remove the effect">
<link rel="match" href="references/not-translated-box-ref.html">
<script src="/web-animations/testcommon.js"></script>
<script src="/common/reftest-wait.js"></script>
<script src="common.js"></script>
#box {
width: 100px;
height: 100px;
background-color: green;
<div id="box"></div>
registerConstantLocalTimeAnimator(500).then(_ => {
const box = document.getElementById('box');
const effect = new KeyframeEffect(box,
{transform: 'translateY(0)'},
{transform: 'translateY(200px)'}
], {
duration: 1000,
iterations: Infinity
const animation = new WorkletAnimation('constant_time', effect);;
waitForAsyncAnimationFrames(1).then(_ => {
// Canceling a playing animation should remove the effect.
waitForAsyncAnimationFrames(1).then(_ => {