var pubsub = {}; 
 
(function(myObject) { 
 
  // Storage for topics that can be broadcast 
  // or listened to 
  var topics = {}; 
 
  // An topic identifier 
  var subUid = -1; 
 
  // Publish or broadcast events of interest 
  // with a specific topic name and arguments 
  // such as the data to pass along 
  myObject.publish = function(topic, args) { 
 
    if (!topics[topic]) { 
      return false; 
    } 
 
    var subscribers = topics[topic], 
      len = subscribers ? subscribers.length : 0; 
 
    while (len--) { 
      subscribers[len].func(topic, args); 
    } 
 
    return this; 
  }; 
 
  // Subscribe to events of interest 
  // with a specific topic name and a 
  // callback function, to be executed 
  // when the topic/event is observed 
  myObject.subscribe = function(topic, func) { 
 
    if (!topics[topic]) { 
      topics[topic] = []; 
    } 
 
    var token = (++subUid).toString(); 
    topics[topic].push({ 
      token: token, 
      func: func 
    }); 
    return token; 
  }; 
 
  // Unsubscribe from a specific 
  // topic, based on a tokenized reference 
  // to the subscription 
  myObject.unsubscribe = function(token) { 
    for (var m in topics) { 
      if (topics[m]) { 
        for (var i = 0, j = topics[m].length; i < j; i++) { 
          if (topics[m][i].token === token) { 
            topics[m].splice(i, 1); 
            return token; 
          } 
        } 
      } 
    } 
    return this; 
  }; 
}(pubsub)); 
 
 
 
Implementation: 
  // Another simple message handler 
 
  // A simple message logger that logs any topics and data received through our 
  // subscriber 
  var messageLogger = function(topics, data) { 
    console.log("Logging: " + topics + ": " + data); 
  }; 
 
// Subscribers listen for topics they have subscribed to and 
// invoke a callback function (e.g messageLogger) once a new 
// notification is broadcast on that topic 
var subscription = pubsub.subscribe("inbox/newMessage", messageLogger); 
 
// Publishers are in charge of publishing topics or notifications of 
// interest to the application. e.g: 
 
pubsub.publish("inbox/newMessage", "hello world!"); 
 
// or 
pubsub.publish("inbox/newMessage", ["test", "a", "b", "c"]); 
 
// or 
pubsub.publish("inbox/newMessage", { 
  sender: "hello@google.com", 
  body: "Hey again!" 
}); 
 
// We can also unsubscribe if we no longer wish for our subscribers 
// to be notified 
pubsub.unsubscribe(subscription); 
 
// Once unsubscribed, this for example won't result in our 
// messageLogger being executed as the subscriber is`enter code here` 
// no longer listening 
pubsub.publish("inbox/newMessage", "Hello! are you still there?");