JSFiddle - React, Tailwind, and code Playground

HTML

DIV: <div></div>
P:<p></p>
Era DIV, ora è P
<div class="chn"></div>

CSS

div { width: 20px; height: 20px; background-color: black; }
p { display: block; width: 30px; height: 30px; background-color: red; }

JavaScript

if($("div.chn").replaceWith("<p></p>").is("div")) alert("True");