JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

CSS

div{
    height: 100px;
    width: 200px;
    background: red;
}
div.doTransition {
    width: 10px;
    transition: width 2s linear;
    -ms-transition: width 2s linear;
    -moz-transition: width 2s linear;
    -webkit-transition: width 2s linear;
    -o-transition: width 2s linear;
}

JavaScript

$(function() {                      
  $("div").click(function() {  
    $(this).addClass("doTransition");     
  });
});