JSFiddle - React, Tailwind, and code Playground

by Taras Pyatyhorskyy

HTML

<head>
 <body>
  <div class="header">Heder</div>

  <body>
  </head>

CSS

body {
  height:100%;
  }
.header{
  background-color: yellow;
  width:100%;
  height:40%; 
}