JSFiddle - React, Tailwind, and code Playground

HTML

<div id="downvotebutton">Test</div>

CSS

div {
    width: 200px;
    height: 200px;
    border: 1px solid red;
}

JavaScript

$('#downvotebutton').click(function() {
    $(this).attr('style', 'background-color: red !important');
    console.log('foo');
});