JSFiddle - React, Tailwind, and code Playground

HTML

<a id="f">Show First content!</a><br/>
<a id="s">Show Second content!!</a>
<hr/>
<div class="a">Default Content</div>
<div class="ab">First content</div>
<div class="abc">Second content</div>

CSS

.hidden{
  display:none;
}