EventEmitter
JavaScript EventEmitter implementation.
Installation
Install via npm (or yarn):
npm install @arnellebalane/event-emitter
Or via CDN (unpkg.com):
<script src="https://unpkg.com/@arnellebalane/event-emitter/dist/event-emitter.umd.js"></script>
Usage
This module exposes a class that you can extend from to make your own classes
support emitting events and being listened to for events.
import EventEmitter from '@arnellebalane/event-emitter';
class MyClass extends EventEmitter {
}
This class is exposed as window.EventEmitter
when not using AMD or CommonJS.
API
Instances of EventEmitter
and its subclasses will have the following methods:
.on(name, callback)
: Listen for an event to be emitted from the instance.
name
(String). The name of the event to listen to.callback
(Function). The function to run when the event is emitted.
.off(name[, callback])
: Stop listening for an event to be emitted from the instance.
name
(String). The name of the event to stop listening to.callback
(Function, Optional). The callback function to remove. If given,
only that callback will be removed. Otherwise, all callback functions for
that event will be removed.
.emit(name[, data])
: Broadcast an event to all observers.
name
(String). The name of the event to broadcast.data
(Any, Optional). The data to be passed to the callback functions.
License
MIT License