JSFiddle - React, Tailwind, and code Playground

by blineberry

HTML

<header>
    <h1>Header</h1>
</header>

CSS

body {
    overflow-x: hidden;
}

header {
    background: black;
    color: white;
    width: 100px;
    position: relative;
    margin: 0 auto;
}

header:before, header:after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 9999em;
    background: black;
}
header:before {
    left: 100%;
}
header:after {
    right: 100%;
}