JSFiddle - React, Tailwind, and code Playground

by David Thomas

HTML

<div id="Container"><div id="expansion"></div></div>

CSS

html {
    padding: 0;
    margin: 0;
}
body {
    margin: 0px;
    padding:0px;
    min-height: 100vh;
    background-color: black;
}
#Container {
    width: 98%;
    min-height: 100vh;
    background-color: grey;
}
#expansion {
    height: 3000px;
    width: 2em;
    background-color: #f00;
}