Foundation for your emitter implementation.
I have observed that there is a tendency to write your own implementation of event emitter. I have written a starter pack for those wishing to improve upon existing variations of event emitter implementation.
Please submit your implementation to the index when you are done.
Sister is 0.5kb event emitter that does three things: on, off and trigger. It performs well (~18,313,548 operations/sec in browser). If you need something more advanced, consider one of the existing, mature alternatives.
Download using NPM:
npm install sister --saveDownload using Bower:
bower install sister --saveIn browser, use gajus.Sister window object.
emitterInstance of theSister()object.eventName of the event.handlerA function to execute when the event is triggered.listenerEvent listener.
- Add
handlerforevent. - Return
listener.
- Remove
listener.
- Invoke
eventlisteners (in sequence) with the supplied argument. - Return
emitter.
var Sister = require('sister'),
emitter = Sister(),
listener;
listener = emitter.on('foo', console.log);
emitter.trigger('foo', 'bar');
emitter.off(listener);
emitter.trigger('foo', 'baz');This example will print "bar" in the console.log.
There are several existing alternatives that you might want to consider before starting to write your own implementation of an event emitter.