Track mouse position (useful for e2e debugging, for example)

index.html

<div id="mouse" style="width:10px; height: 10px; background: red; position: absolute;"></div>
<script type="text/javascript">
    setTimeout(function () {
        var $ = jQuery;
        $(document).mousemove(function (e) {
           $('#mouse').css({ top: e.clientY + 1, left: e.clientX + 1});
        });
    }, 1000);
</script>