JSFiddle - React, Tailwind, and code Playground

by flek

HTML

<div id="test"></div>

CSS

#test {
  position: absolute;
  top: 50px;
  left: 50px;
  width: 1px;
  height: 200px;
  background: black;
  box-shadow: -2px 0 0 2px red;
}