JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://code.jquery.com/jquery.js"></script>
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0-rc1/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.0-rc1/css/bootstrap.min.css">
<div class="container">
    <div class="row">
        <div class="col-4 box1">
            <h1>Test</h1>
        </div>
        <div class="col-8 box2">
            <h1>Test2</h1>
        </div>
    </div>
</div>

CSS

.box1 {
    background-color:green;    
}

.box2 {
    background-color:blue;
}