JSFiddle - React, Tailwind, and code Playground

HTML

<div class="icon-box">1</div>
<div class="icon-box">2</div>
<div class="icon-box">3</div>

CSS

.icon-box { width: 100%; padding: 20px; }
.clicked { color: red; }

JavaScript

jQuery('.icon-box').on('click', function() {
	
  var isActive = false;
  jQuery(this).addClass('clicked');  
  
  if ( jQuery(this).hasClass('clicked') ) {
  	var isActive = true;
  }
	  
});