JSFiddle - React, Tailwind, and code Playground

HTML

<div>asdf</div>

CSS

.previous-image {
    color: #ff0000;
}

JavaScript

var first_img = $("body").find("div").first();

first_img.on("DOMAttrModified", function (e) {
    if (e.originalEvent.attrName === "class") {
        console.log("##DOMAttrModified, class changed");
        if ($(this).hasClass("current-image")) {
            console.log("##Element has 'current-image' class, changing");
            $(this).removeClass().addClass("previous-image");
        }
    }
});

setTimeout(function () {
    first_img.addClass("current-image");
}, 1000);