JSFiddle - React, Tailwind, and code Playground

HTML

<div class="box">Screen 1</div>
<div class="box2">Screen 2</div>

CSS

html, body {margin: 0; padding: 0; overflow-x:hidden;}
.box {width: 100vw; height: 100vh; background-color:#ff0000}
.box2 {width: 100vw; height: 100vh; background-color:#ffff00}