JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#" id="home">Home</a>
<div id="myParagraph">Test</div>

CSS

#myParagraph{
    background-color: red;
}

#myParagraph.yellow {
    background-color: yellow;
    color: white;
}

JavaScript

$('#home').click(function() {
         $("#myParagraph").addClass('yellow');
    });