JSFiddle - React, Tailwind, and code Playground

HTML

<h1>
  Title 1
</h1>
<button id="impaired-button">Impaired Button</button>

CSS

h1 {
   font-size: 25px;
 }
 
 .impaired h1 {
    font-size: 50px; 
}

JavaScript

$('#impaired-button').click(function() {
    $('body').toggleClass('impaired');
});