Different examples of OOP "class" with "inheritance" done using JavaScript including languages that transpile into js. Take notice to the amount of boilerplate that's needed in ES5 compared to ES6. These examples all have the same interface with pros/cons for each pattern. If they seem similar that's whole point especially the difference between…

factory-shared.es5.js

var EventEmitter = require('events').EventEmitter;
var _ = require('lodash');

// Factory shared
var makePerson = function() {
  var person = {};
  EventEmitter.call(person);
  person.wallet = 0;
  _.extend(person, personMethods)
  return person;
}
var personMethods = {};
_.extend(personMethods, EventEmitter.prototype)

personMethods.talk = function() {
  
};

var person = makePerson();
person.talk();

factory-shared.es6.js

import { EventEmitter } from 'events');
 
// Factory shared
var makePerson = function() {
  let person = {};
  EventEmitter.call(person);
  person.wallet = 0;
  Object.assign(person, personMethods)
  return person;
}
let personMethods = {};
Object.assign(personMethods, EventEmitter.prototype)
 
personMethods.talk = function() {
  
};
 
let person = makePerson();
person.talk();

prototypal.js

var EventEmitter = require('events').EventEmitter;

// Prototypal
function Person() {
  var person = Object.create(Person.prototype);
  EventEmitter.call(person);
  person.wallet = 0;
  return person;
}
Person.prototype = Object.create(EventEmitter.prototype);

Person.prototype.talk = function() {
  
};

var person = Person();
person.talk();

pseudo-classical.atscript.js

import { EventEmitter } from 'events';

// AtScript pseudo-classical
class Person extends EventEmitter {
  wallet:int;
  constructor() {
    super();
    this.wallet = 0;
  }
  talk() {
    
  }
}

var person = new Person();
person.talk();

pseudo-classical.coffee

{EventEmitter} = require 'events'

# Coffeescript pseudo-classical
class Person extends EventEmitter
  constructor: ->
    super()
    @wallet = 0
  talk: ->

person = new Person()
person.talk()

pseudo-classical.dart

import 'package:event_emitter/event_emitter.dart';

/// Dart pseudo-classical
class Person extends EventEmitter {
  num wallet;
  
  Person() {
    this.wallet = 0;
  }
  void talk() {
  
  }
}

var person = new Person();
person.talk();

pseudo-classical.es5.js

var EventEmitter = require('events').EventEmitter;

// ES5 Pseudo-classical
function Person() {
  EventEmitter.call(this);
  this.wallet = 0;
}
Person.prototype = Object.create(EventEmitter.prototype);
Person.constructor = Person;

Person.prototype.talk = function() {
  
};

var person = new Person();
person.talk();

pseudo-classical.es6.js

import { EventEmitter } from 'events';

// ES6 pseudo-classical
class Person extends EventEmitter {
  constructor() {
    super();
    this.wallet = 0;
  }
  talk() {
    
  }
}

let person = new Person();
person.talk();

Is there typo? ); https://gist.github.com/gdi2290/bec4889e0a5785cae2a9#file-factory-shared-es6-js-L1

okay.jpg