JSFiddle - React, Tailwind, and code Playground
HTML
<div>Empty <p> elements will disappear in a few seconds...</div>
<p>
</p>
<p>Not empty</p>
<p><br/></p>
<p> </p>
<p>Also not empty</p>
CSS
p { height: 50px; }
JavaScript
window.setTimeout(function () {
$('p').filter(function () { return this.innerHTML == "" }).remove();
}, 3000);