JSFiddle - React, Tailwind, and code Playground

by bryandowning

HTML

base font: 16px

<div>
    2em = 32px font size
    
    <div>2em = 64px font size</div>
</div>

CSS

body {
    font-family: monospace;
    font-size: 16px;
}

div { font-size: 2em }