JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
  <div class="show">1</div>
  <div class="about">2</div>
  <div class="sample1">3</div>
  <div class="sampleetc">4</div> 
</div>

CSS

#container > div:not(.show):not(.about)
{
    display: none;
}