JSFiddle - React, Tailwind, and code Playground

HTML

<div class="clone-this"><span>Chrome</span></div>
  <div class="clone-this"><span>Mozilla Firefox</span></div>
  <div class="clone-this"><span>Safari</span></div>  
  <div class="clone-this"><span>Chrome (1)</span></div>
  <div class="clone-this"><span>Chrome (2)</span></div>

CSS

.clone-this{
  padding: 15px;
  width: 100px;
  text-align: center;
  border: 1px solid #ccc;
  margin: 10px auto;
  cursor: pointer;
  color: #444;
  border: 1px solid #ccc;
  border-radius: 3px;
  font-family: monospace;
}

JavaScript

$(document).on('click', '.clone-this', function(){ 
  var CloneContainer = $(this).clone();
  var content = CloneContainer.find('span').html() .split(' (')[0];
  var no = $(".clone-this:contains('"+content+"')").size();
  
  CloneContainer.html( CloneContainer.html() .split(' (')[0] + " (" + no + ")" );
  CloneContainer.appendTo('body');
});