Short about OOP in JS

oop.js

function Animal() {
  
}

Animal.prototype.drink = function() {
    console.info('drink!');
};

function Cat(shortName, longName) {
    this.longName = longName;
    var name = shortName;
    this.shout = function() {
        console.info(name);
    };
}

Cat.prototype.__proto__ = Animal.prototype;
var kitten1 = new Cat('Mursik', 'Mursik Van Milkovich'),
    kitten2 = new Cat('Kesha', 'Kesha So Dvora');