JSFiddle - React, Tailwind, and code Playground

HTML

<nav>
  Fixed nav
</nav>

<article></article>

CSS

body{color:#444;font:12pt arial;}
nav{position:fixed;top:10px;bottom:10px;width:200px;background-color:#afa;border:1px solid red;}


article{margin-left:210px;background-color:#aaf;height:1000px;}