JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
<head>
    <title></title>
    <meta charset="UTF-8">
    <link rel="stylesheet" type="text/css" href="reset.css">
    <link rel="stylesheet" type="text/css" href="http://meyerweb.com/eric/tools/css/reset/reset.css">
    <style>
        html, body
        {
            height: 100%;
        }

        #container
        {
            position: relative;
            height: 100%;
        }

        #content
        {
            position: absolute;
            top: 50%;
            width: 100%;
            height: 300px;
            margin: -150px 0px 0px 0px;
            background-color: #00FF00;
        }
    </style>
</head>
<body>
    <div id="container">
        <div id="content">this is content</div>
    </div>
</body>
</html>