JSFiddle - React, Tailwind, and code Playground

HTML

<div>
  Div 1
</div>
<div>
  Div 2
</div>
<hr>
<hr>
<hr>
<hr>
<span>
  Span 1
</span>
<span>
  Span 2
</span>

CSS

div{
   width: 40px;
   height: 40px;
   border: 1px solid blue
}

span{
   width: 20px;
   height: 20px;
   border: 1px solid blue
}