ev

README

Synopsis

This is yet another event emitter implementation for node.js. It is nearly fully compatible with the node EventEmitter API (see the differences section). The main purpose for node-ev is to provide very fast event emission when dealing with a relatively low number of listeners. Run the provided benchmarks to see if this is for you.

Differences with node's EventEmitter

• New methods
  • .off(event[, listener]): alias to removeListener()
  • .emit_myevent(): alias for emit('myevent')
• Listeners are triggered without any context whereas EventEmitter applies the emitter's

API

var EV = require('ev')
var ev = new EV({ match: 2 })
function test (a) {
	console.log('received', a)
}
ev.on('match', test)
ev.emit('match', 'standard emit') // received standard emit
ev.emit_match('shortcut emit!') // received shortcut emit!

Methods

• on(event, listener): add a listener for [event]
• once(event, listener): add a listener for [event] and remove it once triggered
• off(event, listener): remove the listener for [event]
• off(event): remove all listeners for [event]
• removeAllListeners(event): remove all listeners for [event]
• removeAllListeners(): remove all listeners for all events
• emit(event[, arguments]): emit [event] with a list of arguments
• setMaxListeners(max): set the maximum number of listeners after which a warning is issued, but the listeners are still added
• listeners([event]): get the list of listeners for [event] or all listeners for all events