JSFiddle - React, Tailwind, and code Playground

HTML

<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<link rel="stylesheet" href="style.css">
</head>
<body>
	
	<div class="parent">
		<div class="child"></div>
		<div class="child"></div>
		<div class="child"></div>
	</div>
</body>
</html>

CSS

* {
	margin: 0;
	padding: 0;
}

.parent {
	width: 500px;
	height: 300px;
	background: black;
}

.child {
	width: 100px;
	height: 20px;
	display: inline-block;
	vertical-align: bottom;
	background: red;
}