JSFiddle - React, Tailwind, and code Playground

by plushyObject

HTML

<div class="div-in-question">
    
</div>

<button id="clickMe">Click it</button>

CSS

.div-in-question {
    width: 250px;
    height: 60px;
    background-color: green;
}

.grow{
    width: 400px;
    -webkit-transition: all .2s ease-in-out;
    -moz-transition: all .2s ease-in-out;
    -o-transition: all .2s ease-in-out;
    -ms-transition: all .2s ease-in-out;
}

JavaScript

$('#clickMe').click(function(){

    $('.div-in-question').addClass('grow');

});