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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /scroll-animations/css/scroll-timeline-update-reversed-animation.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html class="reftest-wait">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Attach a scroll timeline to a reversed animation refTest</title>
<link rel="match" href="./animation-update-ref.html?translate=55px&scroll=825">
<script src="/web-animations/testcommon.js"></script>
</head>
<style type="text/css">
@keyframes anim {
from { transform: translateX(100px) }
to { transform: translateX(0px) }
}
#scroller {
border: 1px solid black;
overflow: hidden;
width: 300px;
height: 200px;
scroll-timeline: --timeline;
}
#target {
margin-bottom: 800px;
margin-top: 800px;
margin-left: 10px;
margin-right: 10px;
width: 100px;
height: 100px;
z-index: -1;
background-color: green;
animation: anim 10s linear paused;
}
#target.update {
animation-play-state: running;
animation-timeline: --timeline;
animation-duration: auto;
}
</style>
<body>
<div id="scroller">
<div id="target"></div>
</div>
</body>
<script type="text/javascript">
document.documentElement.addEventListener('TestRendered', async () => {
runTest();
}, { once: true });
async function runTest() {
await waitForCompositorReady();
const anim = target.getAnimations()[0];
anim.playbackRate = -1;
await anim.ready;
// Scroll to 55% of maximum scroll while paused.
scroller.scrollTop = 825;
await waitForNextFrame();
target.classList.add('update');
await waitForNextFrame();
// Make sure change to animation range was properly picked up.
document.documentElement.classList.remove("reftest-wait");
}
</script>
</body>
</html>