JSFiddle - React, Tailwind, and code Playground
HTML
<div id="main">
<div class="a">hulk</div>
<div class="b"><p>not me</p></div>
<div class="b">booya</div>
<div class="b">sd</div>
<div class="c">we</div>
</div>JavaScript
//$('div.b:not(:has(p))').fadeOut();
$('div.b:has(p)').fadeOut();