<! DOCTYPEhtml>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Use Windows. RequestAnimationFrame animation</title>
    <style type="text/css">
        .m-test{width: 100px;height: 100px;background-color: red; }</style>
</head>

<body>
    <div class="m-test" id="m-test"></div>
    <script type="text/javascript">
    var start = null;
    var element = document.getElementById('m-test');
    element.style.position = 'absolute';

    function step(timestamp) {
        if(! start) start = timestamp;var progress = timestamp - start;
        element.style.left = Math.min(progress / 10.200) + 'px';
        if (progress < 2000) {
            window.requestAnimationFrame(step); }}window.requestAnimationFrame(step);
    </script>
</body>

</html>
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