script src="/resources/testdriver-vendor.js"></script>

        <style>
            .container {
               height: 500px;
               width: 500px;
               border: 1px solid black;
               overflow: hidden;
               position: relative;
            }

            #box {
               height: 50px;
               width: 50px;
               background: red;
               position: absolute;
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        </style>
    </head>
    <body>
        <h1>Pointer Events Capture T