JSFiddle - React, Tailwind, and code Playground

HTML

<div id="message"></div>

JavaScript

var showMessage = function() {
    alert('test fn');
};

var testClass = function() {
    function showMessage(text) {
        $("div").text(text);
    }
    return {
        showMessage: showMessage
    };
}();

testClass.showMessage("my message");