JSFiddle - React, Tailwind, and code Playground

by Alex Slepenkov

HTML

<div class="wrapper">
  <div class="margin"></div>
</div>

CSS

html,body{
  margin:0;
  padding:0;
  height:100%;
}
.wrapper{
  width:100%;
  height:100%;
  background:#3d53d3;
}
.margin{
  margin-top:10px;
  width:10px;
  height:20px;
  border:2px solid red;
}