JSFiddle - React, Tailwind, and code Playground

by poztin

HTML

<div id="parent">
  <div id="child">
      Hello world
  </div>
</div>

CSS

html, body {
    width:100%;
    height:100%;
    margin: 0;
}

#parent {
    background-color:salmon;
    width: calc(100% - 200px);
    height: calc(100% - 200px);
    padding:100px;    
}

#child {
    background-color:steelblue;
    width: 100%;
    height: 100%;
}