JSFiddle - React, Tailwind, and code Playground

by bryandowning

HTML

<header>
    <div></div>
</header>

CSS

header {
    position: relative;
    background-color: #CCC;
}

header:after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    display: block;
    width: 200px;
    background-color: #666;
}

div {
    position: relative;
    z-index: 1;
    width: 50px;
    height: 40px;
    background-color: #000;
}