atomic-emitter

Similar to Raynos' geval, with the following changes:

• will proxy the whole arguments to listeners

Example

atomic-emitter has an interface similar to geval's SingleEvent. You can pass it around, add listeners and emit events.

var Emitter = require("atomic-emitter")
 
var clicksEmitter = Emitter()
 
var removeListener = clicksEmitter(function(ev, time) {
    console.log('click happened', ev)
})
 
document.addEventListener("click", function (ev) {
    clicksEmitter.emit(ev, +new Date())
})
 
// ...
 
removeListener() // and you will stop listening to events

You can also restrict write access to the creator of the emitter, if you want:

var Emitter = require("atomic-emitter")
 
var clicksEmitter = Emitter(function (emit) {
    document.addEventListener("click", function (ev) {
        emit(ev)
    })
})
 
var removeListener = clicksEmitter(function listener(ev) {
    console.log('click happened', ev)
})
 
clicksEmitter.emit({test: true}) // Will throw an exception
 
// ...
 
removeListener() // and you will stop listening to events

The purpose of this is that you no longer have an EventEmitter-inherited object with obscure events, but a normal everyday-object with some of its properties populated with atomic emitters as values -- events are real values now. For example:

var stream = {
  ondata: Emitter()
, onclose: Emitter()
}

API

Emitter(fn:Function(emit:Function)): Emitter

Create an atomic emitter with an emit function passed to the creating code.

Emitter(): Emitter

Create an atomic emitter with a public emit function.

emitter(listener:Function)

Add an event listener.

emitter.emit(args...)

Emit the event.

Legal

(c) 2015 by Marcel Klehr
MIT License