Events

Simplified dependency free EventEmitter as ES6 module with ~60 well readable LOC and ~0.7kb minified footprint for the browser.

Usage

import { EventEmitter } from '@occami/events'

const observable = new EventEmitter()

observable.on('message', console.log)
observable.emit('message', 'foo', 'bar')
// => foo bar

API - supported methods

declare type Listener = (...args: any[]) => void

addListener(eventName: string, listener: Listener): EventEmitter
on(eventName: string, listener: Listener): EventEmitter
once(eventName: string, listener: Listener): EventEmitter
emit(eventName: string, ...args: any[]): boolean
removeListener(eventName: string, listener: Listener): EventEmitter
off(eventName: string, listener: Listener): EventEmitter
removeAllListeners(eventName: string): EventEmitter
eventNames(): string[]
listenerCount(eventName: string): number

Behaviour as specified in NodeJS EventEmitter

See events if you're missing out functionality from the original spec.

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What is Occami?

A collection of modules with these characteristics:

• as simple as possible
• few dependencies (mostly none)
• easy to read & review
• small footprint
• require an ES6 compliant runtime
• not minified, assuming you're bundling anyways
• type definitions included