JSFiddle - React, Tailwind, and code Playground

HTML

<div class="first">
  <div>
    <p>item x</p>
  </div>
</div>

<div class="second">
  <div>
    <p>item 2</p>
  </div>
</div>

JavaScript

$( ".first" ).append( "<p>Test</p>" );