<!DOCTYPE html>
<html>
<head>
    <title>Tests that a composited layer down in the subtree of a negative z-index child triggers a foreground layer</title>
    <style>
        .container {
            width: 300px;
            height: 300px;
            border: 1px solid black;
            position: relative;
            z-index: 0;
        }
        
        .composited {
            transform: translateZ(0);
            background-color: orange;
            width: 100px;
            height: 100px;
        }
        
        .negativez {
            position: relative;
            z-index: -1;
            padding: 10px;
            margin: 10px;
            border: 2px solid gray;
        }
        
        .contents {
            margin: -80px 22px;
            background-color: green;
            width: 100px;
            height: 100px;
        }
    </style>
    <script>
        if (window.testRunner)
            testRunner.dumpAsText();

        window.addEventListener('load', () => {
            if (window.testRunner)
                document.getElementById('layers').innerText = window.internals.layerTreeAsText(document);
        }, false);
    </script>
</head>
<body>
    <div class="container">
        <div class="negativez child">
            <div class="composited child"></div>
        </div>
        <div class="contents"></div>
    </div>
<pre id="layers"></pre>
</body>
</html>