JSFiddle - React, Tailwind, and code Playground

HTML

<div id="selam"></div>
<div id="naber"></div>

CSS

div{width:200px; height:200px; background-color: #000; float:left; margin:5px;}
.renkli{background-color: #c705ee;}

JavaScript

$("#naber").click(function(){
    $(this).toggleClass("renkli");
});