lil'-event

Tiny event bus inspired in Node's EventEmitter

Name	event
Version	0.1.3
Size	2 KB / >1 KB (gzipped)
Environment	Node, Browser

Installation

Node.js

npm install lil-event

Browser

Via Bower

bower install lil-event

Via Component

component install lil-js/event

Or loading the script remotely

<script src="//cdn.rawgit.com/lil-js/event/0.1.3/event.js"></script>

Environments

• Node.js
• Chrome >= 5
• Firefox >= 3
• Safari >= 5
• Opera >= 10
• IE >= 9

Usage

You could fetch de module via require() if it's available. Otherwise, global fallback will be used, exposed via lil.Event

var lil = require('lil-event')

Basic emitter API

function connectDB() {
  var bus = new lil.Event() // or Object.create(lil.Event.prototype)
  db.connect(uri)
    .on('error', function (err) {
      bus.emit('error', err)
    })
    .on('success', function () {
      bus.emit('start', db)
    })
  return bus
}

Events subscription

connectDB()
  .on('error', onErrorHandler)
  .on('start', onStartHandler)

Prototype inheritance

function Human() {}

Human.prototype = Object.create(lil.Event.prototype)

Human.prototype.walk = function (distance) {
  this.emit('walk', distance)
}

Human.prototype.sleep = function (time) {
  this.emit('walk', time)
}

Events subscription

var human = new Human()
human.on('walk', function (distance) {
  // ...
})
human.on('sleep', function (time) {
  // ...
})

API

Event()

Create a new Event bus

Event#on(event, fn)

Alias: addListener Return: this

Subscribe to an specific event

Event#once(event, fn)

Alias: addOnceListener Return: this

Subscribe to a specific event for a once time. After its emitted, the function handler will be removed from the listeners pool

Event#off(event, fn)

Alias: addListener Return: this

Unsubscribe an event listener by name and its handler function

Event#emit(event, [ arguments... ])

Alias: fire Return: this

Fire an event on the current bus

Event#offAll(event)

Alias: removeAllListeners Return: this

Remove all listeners for the given event name

Event.VERSION

Contributing

Wanna help? Cool! It will be appreciated :)

You must add new test cases for any new feature or refactor you do, always following the same design/code patterns that already exist

Development

Only node.js is required for development

Clone the repository

$ git clone https://github.com/lil-js/event.git && cd event

Install dependencies

$ npm install

Generate browser bundle source

$ make browser

Run tests

$ make test

License

MIT © Tomas Aparicio