function Foo() { 'use strict'; let self = {}; /**************************************************************************** * Properties ***************************************************************************/ self.foo1 = 15; self.foo2 = 'testing'; self.foo3 = { i: 1, am: 2, a: 3, literal: 4 }; self.foo4 = null; /**************************************************************************** * Methods ***************************************************************************/ self.constructor = function () { self.foo4 = self.foo2 + self.foo1; } self.doFoo1 = function () { return self.foo2; } self.doFoo2 = function () { self.foo1 += 1; return self.foo1; } /**************************************************************************** * Public Exports ***************************************************************************/ self.public = { doFoo1: self.doFoo1, doFoo2: self.doFoo2 } self.constructor(); return self.public; } preFoo = Foo(); function Bar() { this._foo1 = 15; this._foo2 = 'testing'; this._foo3 = { i: 1, am: 2, a: 3, literal: 4 }; this._foo4 = this._foo2 + this._foo1; } Bar.prototype.doFoo1 = function () { return this._foo2; } Bar.prototype.doFoo2 = function () { this._foo1 += 1; return this._foo1; } preBar = new Bar();