JSFiddle - React, Tailwind, and code Playground

HTML

<div id="a">
  div 1
</div>
<div id="b">
  div2
</div>

CSS

#a  {
  height:50px;width:100%;
  background-color:red;
}

#b  {
  height:50px;
  width:100%;
  background-color:green;
}