JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
<div id="a">
  <button class="b d">button</button>
</div>
<div id="c" class="d">content</div>
<div id="f">content2</div>

CSS

.d.e {
  color: red;
}

#c {
  width: 200px;
  height: 200px;
  background: blue;
}

#f {
  width: 200px;
  height: 200px;
  background: yellow;
}

JavaScript

$(function() {
	$("button.b").on("click", function() {
  	$(".d").addClass("e");
  })
  
  $(".e").on("click", function() {
  	$(".d").removeClass("e");
  })
})