JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
<div class="block">
    <div class="body">BODY
    </div>
</div>

CSS

.body::before {
    background: blue;
    content: "\e005";
    font-family: "Glyphicons Halflings";
    display: table-cell;
    width:30%;
}

.body {
    background-color: green;
    display: table;
    width: 25%;
}