JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
    <div class="left"></div>
    <div class="right"></div>
</div>

CSS

.wrapper {width:250px;}
.wrapper div{background:green;}
.left{width:100px;height:30px;}
.right{float:right;width:150px;height:50px;}