<!DOCTYPE html> <!-- webkit-test-runner [ AsyncOverflowScrollingEnabled=true ] -->
<html>
<head>
    <style>
        .flex {
            display: flex;
            width: 500px;
            border: 1px solid black;
        }
        .clipped {
            overflow: hidden;
            width: 100%;
        }
        .relative {
            position: relative;
        }
        .scroller {
            overflow-y: scroll;
            width: 100%;
            height: 500px;
        }
        .contents {
            height: 3000px;
            width: 100%;
        }
        .handler {
            background-color: silver;
            margin: 510px 20px;
            width: 100px;
            height: 100px;
        }
    </style>
    <script src="../../../../resources/ui-helper.js"></script>
    <script>
        if (window.testRunner)
            testRunner.dumpAsText();
    
        window.addEventListener('load', () => {
            if (window.internals)
                results.innerText = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_EVENT_REGION);
        }, false);
    </script>
</head>
<body>
    <div class="flex">
        <div class="clipped">
            <div class="relative">
                <div class="scroller">
                    <div class="contents">&nbsp;
                        <div class="handler" onmousewheel="(void)0"></div>
                    </div>
                </div>
            </div>
        </div>
    </div>
<pre id="results"></pre>
</body>
</html>