JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://getbootstrap.com/2.3.2/assets/css/bootstrap.css">
<div class="overlay mouse-events-off">
        <div class="progress progress-striped active">
            <div class="bar" style="width: 40%;"></div>
        </div>
    </div>

CSS

.overlay { background-color: black; position: fixed; top: 0; right: 0; bottom: 0; left: 0; opacity: 0.2; /* also -moz-opacity, etc. */ z-index: 100; }
.progress { position: absolute; top: 50%; left: 35%; width:300px; height:20px; z-index:101; opacity:1.0; }