JSFiddle - React, Tailwind, and code Playground

HTML

<div class="aDiv blue">Change to blue</div>
<div class="aDiv orange">Change to orange</div>
<div class="aDiv pink">Change to pink</div>

CSS

.blue.active {
    border: 3px solid blue;
}

.orange.active {
    border: 3px solid orange;
}

.pink.active {
    border: 3px solid pink;
}

JavaScript

$('.aDiv').on("click", doThis);

function doThis() {
    $(this).addClass('active');
}