<!DOCTYPE html>
<style>
#container {
overflow: scroll;
width: 400px;
height: 300px;
}
#clipping {
overflow: hidden;
height: 1000px;
position: relative;
z-index: 0;
}
#clipped {
height: 10px;
border: solid 1px black;
transform: translateZ(0);
}
</style>
<div id="container">
<div id="clipping">
<div>Lorem ipsum</div>
<div id="clipped"></div>
</div>
</div>
<script>
if (window.testRunner) {
testRunner.waitUntilDone();
testRunner.layoutAndPaintAsyncThen(function() {
document.getElementById('container').scrollTop = 1000;
testRunner.notifyDone();
});
} else {
// For manual test.
setTimeout(function() {
document.getElementById('container').scrollTop = 1000;
}, 500);
}
</script>