JSFiddle - React, Tailwind, and code Playground

by phloe

HTML

<div class="vu"></div>

CSS

.vu {
	position: absolute;
	top: 0;
	left: 0;
	width: 100vw;
	height: 100vh;
	background-color: red;
}
* {
	padding: 0;
	margin: 0;
}
html, body {
	height: 100%;
}
body {
	overflow: scroll;
}

JavaScript

var vu = document.querySelector(".vu");
var html = document.documentElement;
console.log("width", html.offsetWidth, vu.offsetWidth);
console.log("height", html.offsetHeight, vu.offsetHeight);