JSFiddle - React, Tailwind, and code Playground

HTML

<div id='box1'></div>

CSS

#box1 {
    width:100px;
    height:100px;
    background-color:white;
    border:1px solid black;
}

JavaScript

$( "#box1" ).click(function() {
      $('#box1').css('background-color', 'red');
});