JSFiddle - React, Tailwind, and code Playground

JavaScript

// http://daniel.steigerwald.cz (MIT Licensed)

var Animal = function(p_name) {
    var name = p_name;
    // privilegovaná metoda
    this.showName = function() {
        alert(name);
    }
};
var kitty = new Animal('Kitty');
kitty.showName(); // 'Kitty' 

alert(kitty instanceof Animal); // true