JSFiddle - React, Tailwind, and code Playground

HTML

<div id="div1"></div>
<div id="div2"></div>

CSS

#div1{
    background:black;
    height:200px;
    width:200px;
}
#div2{
    
    height:200px;
    width:200px;
}
.clicked {
    background:red;
}

JavaScript

$("#div1").click(function() {
    document.getElementById('div2').classList.toggle("clicked");
 });