JSFiddle - React, Tailwind, and code Playground

by trkli

HTML

<div class="scroll">a<br>a<br>a<br>a<br>a<br>a<br>a<br>a<br>a<br>a<br>a<br>a<br>a<br>a<br>a<br>a<br>a<br>a<br>a<br>a<br>a<br>a<br>a</div>
<div class="el"></div>

CSS

* { padding: 0; margin: 0; }

.scroll {
  width: 100px;
  height: 1500px;
  background: red;
}

.el {
  position: fixed;
  width: 100px;
  height: 100px;
  top: 0;
  left: 0;
  background: pink;
}