<script src="../../../resources/js-test-pre.js"></script>
<script src="../resources/media-controls-loader.js" type="text/javascript"></script>
<body>
<script type="text/javascript">

description("Testing <code>ControlsBar</code> establishes a stacking context.");

const controlsBar = new ControlsBar;
document.body.appendChild(controlsBar.element);
shouldBeEqualToString("getComputedStyle(controlsBar.element).willChange", "z-index");

</script>
<script src="../../../resources/js-test-post.js"></script>
</body>