Emitter
Event emitter component.
Installation
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:
As a mixin:
As a prototype mixin:
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
event
andfn
to remove a listener.Pass
event
to 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.
License
MIT
Last updated