Events

The Events module provides a mechanism for emitting and receiving events.

Basic example

//The following will create an alert message every time the event `customEvent` is triggered.
AP.require('events', function(events){
  events.on('customEvent', function(){
      alert('event fired');
  });
  events.emit('customEvent');
});

Methods

emit (name, args)

Emits an event on this bus, firing listeners by name as well as all any listeners. Arguments following the name parameter are captured and passed to listeners.

Parameters

Name	Type	Description
`name`	String	The name of event to emit
`args`	Array.<String>	0 or more additional data arguments to deliver with the event

off (name, listener)

Removes a particular listener for an event.

Parameters

Name	Type	Description
`name`	String	The event name to unsubscribe the listener from
`listener`	function	The listener callback to unsubscribe from the event name

offAll name

Removes all listeners from an event name, or unsubscribes all event-name-specific listeners if no name if given.

Parameters

Name	Type	Argument	Description
`name`	String	<optional>	The event name to unsubscribe all listeners from

offAny (listener)

Removes an any event listener.

Parameters

Name	Type	Description
`listener`	function	A listener callback to unsubscribe from any event name

on (name, listener)

Adds a listener for all occurrences of an event of a particular name. Listener arguments include any arguments passed to events.emit, followed by an object describing the complete event information.

Parameters

Name	Type	Description
`name`	String	The event name to subscribe the listener to
`listener`	function	A listener callback to subscribe to the event name

onAny (listener)

Adds a listener for all occurrences of any event, regardless of name. Listener arguments begin with the event name, followed by any arguments passed to events.emit, followed by an object describing the complete event information.

Parameters

Name	Type	Description
`listener`	function	A listener callback to subscribe for any event name

once (name, listener)

Adds a listener for one occurrence of an event of a particular name. Listener arguments include any argument passed to events.emit, followed by an object describing the complete event information.

Parameters

Name	Type	Description
`name`	String	The event name to subscribe the listener to
`listener`	function	A listener callback to subscribe to the event name