JSFiddle - React, Tailwind, and code Playground

HTML

<div><h1>1</h1></div>

CSS

html {
    background: #fff;
}

body {
    height: 100px;
    background: magenta;
}

h1 {
    margin: 30px;
}

div {
    width: 100px;
    height: 100px;
    background: yellow;
    padding: 0.01px;
    
}