<!DOCTYPE html> <!-- webkit-test-runner [ internal:AsyncOverflowScrollingEnabled=true ] -->
<html>
<head>
    <style>
        .scroller {
            margin: 20px;
            width: 300px;
            height: 300px;
            overflow: auto;
            border: 2px solid black;
            opacity: 0.8;
        }

        .absolute {
            position: absolute;
            width: 100px;
            height: 100px;
            top: 100px;
            left: 50px;
            padding: 20px;
            background-color: silver;
        }
        
        .clipping {
            overflow: hidden;
        }

        .inner {
            top: 50px;
            width: 100px;
            height: 100px;
            background-color: blue;
        }

        .spacer {
            height: 500px;
            background-image: repeating-linear-gradient(white, silver 200px);
        }
    </style>
    <script>
        if (window.testRunner)
            testRunner.dumpAsText();

        window.addEventListener('load', () => {
            if (window.internals)
                document.getElementById('layers').textContent = internals.layerTreeAsText(document);
        }, false);
    </script>
</head>
<body>
    <div class="scroller">
        <div class="clipping absolute">
            <div class="inner absolute"></div>
        </div>
        <div class="spacer"></div>
    </div>
<pre id="layers"></pre>
</body>
</html>