JSFiddle - React, Tailwind, and code Playground

by techsin

HTML

<div class="out">
    <div class="in"></div>
</div>

CSS

* {
    margin: 0;
    padding: 0;
}
html, body {
    position: relative;
    height: 100%;
    width: 100%;
}
.in, .out {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
}
.in {
    background-color: red;
    height: 50%;
}
.out {
    background-color: blue;
}