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<!DOCTYPE html>
<html>
<head>
<style>
#container {
width: 200px;
height: 200px;
overflow: scroll;
}
#content {
width: 7500px;
height: 7500px;
background-color: blue;
}
</style>
<script src="../../resources/js-test.js"></script>
<script type="text/javascript">
jsTestIsAsync = true;
description("This test checks that a smooth scroll finishes even when composited scrolling " +
"is lost during the animation.");
function startSmoothScroll() {
var scrollToOptions = {behavior: "smooth", top: 6000};
document.getElementById("container").scrollTo(scrollToOptions);
window.requestAnimationFrame(preventCompositedScrolling);
}
function preventCompositedScrolling() {
document.getElementById("container").style.borderRadius = "4px";
window.requestAnimationFrame(waitForSmoothScrollEnd);
}
function waitForSmoothScrollEnd() {
if (document.getElementById("container").scrollTop == 6000) {
testPassed("Scroll destination reached.");
finishJSTest();
} else {
window.requestAnimationFrame(waitForSmoothScrollEnd);
}
}
window.onload = function() {
if (window.internals) {
window.internals.settings.setPreferCompositingToLCDTextEnabled(true);
}
window.requestAnimationFrame(startSmoothScroll);
}
</script>
</head>
<body>
<div id="container">
<div id="content"></div>
</div>
</body>
</html>
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