Exemplo JS OO

person.js

var App = App || {};

App.Person = function(name, age) {
  this.name = name;
  this.age = age;
};

App.Person.prototype.getName = function() {
  return this.name;
};

App.Person.prototype.getAge = function() {
  return this.age;
};

var user = new App.Person("Arthur", 56);

var nameUser = user.getName();
var ageUser = user.getAge();

console.log(nameUser, ageUser); //=> Arthur 56