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<!doctype HTML>
<link rel="author" title="Chris Harrelson" href="chrishtr@chromium.org">
<link rel="match" href="composite-change-after-scroll-preserves-stacking-order-ref.html">
<link rel="help" href="https://www.w3.org/TR/CSS2/zindex.html"/>
<script src="/common/reftest-wait.js"></script>
<script src="/web-animations/testcommon.js"></script>
<style>
#one, #two {
width: 200px; height: 200px; background: lightblue; position: relative
}
#one {
background: lightblue
}
#two {
background: lightgray;
margin-top: -200px;
}
</style>
<html class=reftest-wait>
<div id=scroller style="overflow: scroll; width: 300px; height: 300px; will-change: transform">
<div id=one></div>
<div id=two></div>
<div id=spacer style="width: 50px; height: 5000px"></div>
</div>
</html>
<script>
onload = () => {
waitForAnimationFrames(2).then(() => {
scroller.scrollBy(0, 1000);
waitForAnimationFrames(2).then(() => {
one.style = 'will-change: transform';
waitForAnimationFrames(2).then(() => {
scroller.scrollBy(0, -1000);
takeScreenshot();
});
});
});
};
</script>
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