JSFiddle - React, Tailwind, and code Playground

HTML

<div>
  First wrapper<br>
  First wrapper<br>
  First wrapper<br>
  First wrapper<br>
  First wrapper<br>
  First wrapper<br>
  First wrapper<br>
  First wrapper<br>
  First wrapper<br>
  First wrapper<br>
  First wrapper<br>
  First wrapper<br>
  First wrapper<br>
  First wrapper<br>
  First wrapper<br>
  First wrapper<br>
  First wrapper<br>
</div>

CSS

html, body {
  height: 100%;
  background: green;
  padding: 0;
  margin: 0;
}
body {
  padding: 20px;
  box-sizing: border-box;
}

div {
  height: 100%;
  background: red;
  overflow: auto;
  padding: 50px;
  box-sizing: border-box;
}