JSFiddle - React, Tailwind, and code Playground

HTML

<div class="selector animated"></div>

CSS

.animated {-webkit-transition:background 0.4s ease;-moz-transition:background 0.5s ease;-ms-background 0.5s ease;background 0.5s ease;}
    .selector {background:red;width:300px;height:200px;}
    .transparent_background {background: transparent};

JavaScript

$(".selector").addClass("transparent_background");