JSFiddle - React, Tailwind, and code Playground

JavaScript

var a = function() {
    var _private = null;
    var _public = null;
    function init() {
        _private = 'private';
        _public = 'public';
    }
    function getPrivate() {
        return _private;
    }
    return {
        _public : _public,
        init : init,
        getPrivate : getPrivate,
    }
}();

a.init();
console.log( a._public );
console.log( a.getPrivate() );