Node.js: Extend a class to be an EventEmitter

emitter.js

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

var Server = function() {
  var self = this;

  this.on('custom_event', function() {
    self.logSomething('custom_event');
  });

  this.logSomething('init');
};

util.inherits(Server, EventEmitter);

Server.prototype.doSomething = function() {
  this.emit('custom_event');
};

Server.prototype.logSomething = function(something) {
  console.log(something);
}

var s = new Server();
s.doSomething();

you might want to add the following to the constructor

EventEmitter.call(this);

So that the object is initialized by EventEmitter's contructor

@elimence, I guess you mean: so that the object fires the EventEmitter's contructor. Server inherits from EventEmitter.

There is no class (es6) in this example.

There is no class (es6) in this example.
the example is from 9 years ago :P