JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/waypoints/4.0.0/jquery.waypoints.min.js"></script>
<div class="htmlchange">option1</div>
<div class="htmlchange" id="2">option2</div>
<div class="htmlchange">option3</div>
<input type="button" id="change" value="change">

CSS

.changed{
  color:red;
}

JavaScript

$('.htmlchange').bind("DOMSubtreeModified",function(){
 $(this).addClass('changed');
});

$("#change").click(function(){
	$("#2").html('changed');
  //you can either cadd from here or use  DOMSubtreeModified handler   
  $("#2").addClass('changed');
})