JSFiddle - React, Tailwind, and code Playground

HTML

<html>
    <body>
        <div>Hi!</div>
    </body>
</html>

JavaScript

// This is an example of dinamic method creation
// see http://phrogz.net/JS/classes/ExtendingJavaScriptObjectsAndClasses.html#prototype

if (!Object.noopFunc) {
    Object.prototype.noopFunc = function(e) {
        return "noOp";
    }
}

function myNiceEffectFunction() {
    // Using a bare Jquery effect
    $("div").fadeOut(500, someCallback);
}

function someCallback() {
    alert("I'm never called");
}

$(myNiceEffectFunction);