JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
    <div class="box">Box 1</div>
    <div class="box">Box 2</div>
</div>

CSS

.wrapper {
    height: 400px;
}

.wrapper .box{
    float: left;
    height: 100%;
    width: 200px;
    background-color: red;
    margin-right: 10px;
}