JSFiddle - React, Tailwind, and code Playground

by Boris Šuška

HTML

<div class="outer">
	<div class="red"></div>
	<div class="blue"></div>
</div>

CSS

.outer {
	width: 100px;
	padding: 50px;
    background: green;
}
.red {
	width: 100%;
	height: 100%;
	background: red;
}
.blue {
	width: auto;
	height: 100px;
    margin: 50px;
	background: blue;
}