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Test Info:

<!DOCTYPE html>
<html class="test-wait">
<title>CSS Test (Animations): Reparenting an element with a web animation on the compositor</title>
<link rel="author" title="L. David Baron" href="https://dbaron.org/">
<link rel="author" title="Google" href="http://www.google.com/">
<meta name="assert" content="This should not crash.">
<style>
#animate {
width: 100px;
height: 100px;
background: blue;
}
</style>
<div id="animate"></div>
<div id="newparent"></div>
<script>
document.getElementById("animate").animate(
[
{ transform: "rotate(0deg)" },
{ transform: "rotate(360deg)" }
],
{
duration: 5000,
iterations: Infinity
}
);
requestAnimationFrame(function() {
requestAnimationFrame(function() {
document.getElementById("newparent").appendChild(document.getElementById("animate"));
requestAnimationFrame(function() {
document.documentElement.classList.remove("test-wait");
});
});
});
</script>