blob: 78cfba887ebc48eec8719bb3fb09389c71281481 [file] [log] [blame]
<!DOCTYPE html> <!-- webkit-test-runner [ AsyncOverflowScrollingEnabled=true ] -->
<html>
<head>
<title>Tests an overflow scroll stops compositing if its content shrinks</title>
<style>
.scrollable {
overflow-y: scroll;
height: 300px;
width: 300px;
margin: 10px;
border: 1px solid black;
}
.contents {
height: 500px;
width: 20px;
background-color: silver;
}
.contents.changed {
height: 100px;
}
</style>
<script>
if (window.testRunner) {
testRunner.dumpAsText();
testRunner.waitUntilDone();
}
window.addEventListener('load', () => {
setTimeout(() => {
document.querySelector('.contents').classList.add('changed');
if (window.internals)
document.getElementById('layers').innerText = window.internals.layerTreeAsText(document);
if (window.testRunner)
testRunner.notifyDone();
}, 0);
}, false);
</script>
</head>
<body>
<div class="scrollable">
<div class="contents"></div>
</div>
<p>There should be no layers.</p>
<pre id="layers"></pre>
</body>
</html>