JSFiddle - React, Tailwind, and code Playground

HTML

<div id="main">
 <div class="a"></div>
 <div class="b"><p>not me</p></div>
 <div class="b"></div>
 <div class="b"></div>
 <div class="c"></div>
</div>

JavaScript

alert($('div.b:not(:has(p))').length);