Bobby L. Craig

A dead simple way to do inheritance in JS. var inherits = require("inherits") function Animal () { this.alive = true } Animal.prototype.say = function (what) { console.log(what) } inherits(Dog, Animal) function Dog () { Dog.super.apply(this) } Dog.prototype.sniff = function () { this.say("sniff sniff") } Dog.prototype.bark = function () { this.say("woof woof") } inherits(Chihuahua, Dog) function Chihuahua () { Chihuahua.super.apply(this) } Chihuahua.prototype.bark = function () { this.say("yip yip") } // also works function Cat () { Cat.super.apply(this) } Cat.prototype.hiss = function () { this.say("CHSKKSS!!") } inherits(Cat, Animal, { meow: function () { this.say("miao miao") } }) Cat.prototype.purr = function () { this.say("purr purr") } var c = new Chihuahua assert(c instanceof Chihuahua) assert(c instanceof Dog) assert(c instanceof Animal) The actual function is laughably small. 10-lines small.