JSFiddle - React, Tailwind, and code Playground

HTML

<div class="foo">
    click me
</div>

JavaScript

$('.foo').on("click", function() {
    var $el = $(this).toggleClass("fa-stop-circle");
    if ($el.hasClass('fa-stop-circle')) {
        // do something...
        console.log('has class!'); // only fires every other click
    }
});