JSFiddle - React, Tailwind, and code Playground

by Nenad Novakovic

HTML

<div class="overlay"></div>

CSS

html, body {
    position: relative;
    height: 100%;
}

.overlay {
    position: relative;
    background-color: #39d;
    width: 100%;
    height: calc(100% - 123px);
}