Simple ES5 Class Inheritance

gistfile1.js

// Event Emitter Class
// ringo/events.js

export('EventEmitter');

function EventEmitter() {

}

EventEmitter.prototype = Object.create(Object.prototype,

   event: {
      value: {}
   },

   on: {
      value: function(event, callback) {
         if (event in this.events) {
            this.events[event] = [];
         }

         this.events[event].push(callback);
      }
   },

   emit: {
      value: function(event, args) {
         if ( ! (event in this.events)) {
            return;
         }

         this.events[event].forEach(function(callback) {
            callback.apply(undefined, args);
         });
      }
   }
}

// My Observable Class
// Implements the event emitter interface

{EventEmitter} = require('ringo/events');

export('MyClass');

function MyClass() {

}

MyClass.prototype = Object.create(EventEmitter.prototype, {

   myValue: { value: 'abc' }
});