<style>
    .box {
        position: absolute;
        width: 100px;
        height: 100px;
    }
</style>
<script src="resources/ensure-hidpi.js"></script>
<body>
    <div class="box" style="left: 0px; top: 0px; background-color: green;"></div>
    <div class="box" style="left: 110px; top: 0px; background-color: green;"></div>
</body>