observer.js

An implementation of the observer design pattern.

Tested Platforms: V8 (Node)

From NPM

npm install observer

Usage

To create an observation table: var EventBroker = require('observer').EventBroker;

var events = new EventBroker;
events.create('foobar');

events.subscribe('foobar', console.log.bind(console,'observer#1:') );
events.subscribe('foobar', console.log.bind(console,'observer#2:') );

events.publish('foobar',3,14);

// => observer#1, 3, 14
// => observer#2, 3, 14

To create an observable class: var Observable = require('observer').Observable, inherits = require('util').inherits;

function Foobar(){
  Observable.call(this);
  this.create('qux');
}

var f = new Foobar();
f.on('qux', console.log.bind(console, 'observer#3:');
f.events.publish('qux',3,14);

// => observer#3, 3, 14

Testing

node test/test.js