simple-observer

Simple Javascript Observer Pattern

dependencies: https://github.com/html5crew/simple-inheritance

usage

To implement observer pattern:

var View = Observer.extend({
    init: function () {
    },
    render: function () {
        ...
        parentElement.appendChild(element);
        this.emit('didInsertElement', element);
    }
});

var view = new View();

view.on('didInsertElement', function (el) {
    el.classList.add('highlight');
});

As an event queue:

// as a event queue
var queue = new Observer();

...

queue.on('custom-event', function (eventObject) {
    
});

...

queue.emit('custom-event', { foo: "bar" });

API

on(event(s), callback)

arguments

• event(s):
  • type: String or Array
• callback:
  • type: Function

off(event(s), callback)

arguments

• event(s):
  • type: String or Array
• callback:
  • type: Function

emit(event(s), eventObject)

arguments

• event(s):
  • type: String or Array
• callback:
  • type: Function

once(event, callback)

arguments

• event:
  • type: String
• callback:
  • type: Function