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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /scroll-animations/css/view-timeline-subject-bounds-update.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>Update subject bounds refTest</title>
<link rel="match"
href="./animation-update-ref.html?translate=100px&scroll=800">
<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;
}
#target {
margin-bottom: 800px;
margin-top: 700px;
margin-left: 10px;
margin-right: 10px;
width: 100px;
height: 200px;
z-index: -1;
background-color: green;
animation: anim auto both linear;
animation-timeline: --timeline;
view-timeline: --timeline;
animation-range: exit;
}
#target.bounds-update {
height: 100px;
/* Keep the scroll range the same. */
margin-top: 800px;
}
</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];
// Scroll to exit 50%.
scroller.scrollTop = 800;
await waitForNextFrame();
// After the update to the animation range, the positioning is exit 0%
target.classList.add('bounds-update');
await waitForNextFrame();
// Make sure change to animation range was properly picked up.
document.documentElement.classList.remove("reftest-wait");
}
</script>
</body>
</html>