JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
    <div id="left"></div>
    <div id="right"></div>
</div>

CSS

#container {width:200px;background:#faf;min-height:10px;overflow:auto;}
#left {width:100px;background:#fa0;float:left;height:100px;}
#right{width:100px;background:#09f;float:left;height:110px;}