JarCastingEmitter
Event emitter component.
Installation
$ npm install component-emitter2
API
Emitter(obj)
The Emitter may also be used as a mixin. For example a "plain" object may become an emitter, or you may extend an existing prototype.
As an Emitter instance:
var Emitter = require('emitter');
var emitter = new Emitter;
emitter.emit('something');
As a mixin:
var Emitter = require('emitter');
var user = { name: 'tobi' };
Emitter(user);
user.emit('im a user');
As a prototype mixin:
var Emitter = require('emitter');
Emitter(User.prototype);
Emitter#on(event, fn)
Register an event handler fn.
Emitter#once(event, fn)
Register a single-shot event handler fn, removed immediately after it is invoked the first time.
Emitter#off(event, fn)
- Pass
eventandfnto remove a listener. - Pass
eventto remove all listeners on that event. - Pass nothing to remove all listeners on all events.
Emitter#emit(event, ...)
Emit an event with variable option args.
Emitter#listeners(event)
Return an array of callbacks, or an empty array.
Emitter#hasListeners(event)
Check if this emitter has event handlers.
Emitter#eventNames()
Returns an array listing the events for which the emitter has registered listeners.
License
MIT
