blob: 3dc8e0a2c4c68469ab66024ce8f3fb9ba13f99b7 [file] [log] [blame]
<!DOCTYPE html> <!-- webkit-test-runner [ internal:AsyncOverflowScrollingEnabled=true ] --><html>
<head>
<style>
#scroller {
position: relative;
z-index: 0;
width: 300px;
height: 300px;
border: 1px solid black;
overflow: scroll;
padding: 10px;
}
.contents {
height: 1000px;
}
.negative {
position: absolute;
z-index: -1;
top: 50px;
left: 30px;
width: 100px;
height: 100px;
background-color: blue;
border: 1px solid green;
transform: translateZ(0);
}
</style>
<script>
if (window.testRunner) {
testRunner.dumpAsText();
testRunner.waitUntilDone();
}
window.addEventListener('load', () => {
setTimeout(() => {
if (window.internals)
internals.startTrackingRepaints();
scroller.scrollTo(0, 200);
document.getElementById('layers').textContent = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_REPAINT_RECTS);
if (window.testRunner)
testRunner.notifyDone();
}, 0);
}, false);
</script>
</head>
<body>
<div id="scroller">
<div class="negative"></div>
<div class="contents">Scrolled contents</div>
</div>
<pre id="layers"></pre>
</body>
</html>