JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#pop">Click me</a>
<br />
<div id="pop"></div>

CSS

body {
  padding: 25px;
  
}
#pop {
  width: 100px;
  height: 100px;
  background: #000;
  opacity: 0;
}

#pop:target {
  opacity: 1;
  
}