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<!DOCTYPE html>
<html class="reftest-wait">
<meta charset="UTF-8">
<title>reverse running animation</title>
<link rel="match" href="reverse-running-animation-ref.html">
<script src="/common/reftest-wait.js"></script>
<script src="../../testcommon.js"></script>
<style>
#box, #overlay {
/* Add a border to ensure that anti-aliasing does not leak blue pixels
outside of the element's bounds. */
border: 1px solid white;
height: 40px;
position: absolute;
top: 40px;
width: 40px;
}
#box {
background: blue;
left: 40px;
z-index: 1;
}
#overlay {
background: white;
left: 140px;
z-index: 2;
}
#notes {
position: absolute;
left: 0px;
top: 100px;
}
body {
backgrond: white;
}
</style>
<body>
<div id="box"></div>
<div id="overlay"></div>
<p id="notes">
This test reverses the animation shortly after the box starts moving. If
any blue pixels are visible the test has failed.
</p>
</body>
<script>
onload = async function() {
// Double rAF to ensure that we are not bogged down during initialization
// and the compositor is ready.
waitForAnimationFrames(2).then(() => {
const elem = document.getElementById('box');
const anim = elem.animate([
{ transform: 'translateX(100px)' },
{ transform: 'translateX(100px)', offset: 0.49 },
{ transform: 'translateX(200px)', offset: 0.51 },
{ transform: 'translateX(200px)' }
], {
duration: 10000,
});
anim.ready.then(() => {
anim.currentTime = 5000;
requestAnimationFrame(() => {
anim.reverse();
takeScreenshotDelayed(1000);
});
});
});
};
</script>
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