JSFiddle - React, Tailwind, and code Playground
HTML
<div class="d1"></div>
<div class="d2"></div>CSS
*{padding:0;margin: 0;}
html,body,.d1{height: 100%;}
body{overflow:hidden;}
.d1{background-color: red;height: 200px}
.d2{height:100%;background-color:blue;}