absolute-position-changed-with-composited-parent-layer.html

<!DOCTYPE html>
<html>
<head>
    <style>
        html { overflow: hidden; }
        body { margin: 0px; }
        div { height: 100px; width: 100px; }
        .fixed { position: fixed; }
        .absolute { position: absolute; }
        .green { background-color: green; }
        .red { background-color: red; }
        .composited { will-change: transform; }
    </style>
    <script type="text/javascript">
        function moveAbsoluteDiv()
        {
            document.getElementById('absoluteDiv').style.top = '700px';
        }
        window.addEventListener('load', moveAbsoluteDiv, false);
    </script>
</head>
<body style="height:2000px;">
    <!-- You should see 1 green rectangle in the output and no red. -->
    <div style="top: 200px; left: 100px;" class="fixed red"></div>
    <div class="composited"><div id="absoluteDiv" style="top: 500px; left:100px;" class="absolute green"></div></div></div>
    <script>
        window.scrollTo(0, 500);
    </script>
</body>
</html>

chromium/third_party/blink/web_tests/compositing/absolute-position-changed-with-composited-parent-layer.html