JSFiddle - React, Tailwind, and code Playground

HTML

<div id="bloco"></div>

CSS

#bloco {
    width:50px;
    height:50px;
    background-color:blue;
    transition:background-color 0.5s ease, width 1s ease;
}

.outraClasse {
    background-color:yellow !important;
    width:400px !important;
}

JavaScript

$("#bloco").click( function() { 
    $(this).toggleClass("outraClasse");
});