JSFiddle - React, Tailwind, and code Playground

by userdude

HTML

<link rel="stylesheet" href="http://onehackoranother.com/projects/jquery/boxy/stylesheets/boxy.css">
<script src="http://onehackoranother.com/projects/jquery/boxy/javascripts/jquery.boxy.js"></script>
<div id="parent">
    <div id="center"></div>
</div>

CSS

#parent {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 120px;
    height: 60px;
    margin: -60px 0 0 -30px;
    background: blue;
}
#center {
    position: absolute;
    width: 50%;
    height: 50%;
    top: 50%;
    left: 50%;
    margin: -12.5% 0 0 -25%;
    background: green;
}