JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<div class='neispravnost'>
<button id="button">Клац</button>
</div>

CSS

.active{
  background: red;
}

JavaScript

$('document').ready(function(){

$('.neispravnost').on('click', '#button', function(){
			var obj = $(this);
      setTimeout(function(){
             obj.addClass('active');
      }, 3000 );
});
});