event-emitter-mixin

Event emitter mixin using ES7 decorators.

Features:

• Usual on(), off() and emit() methods.
• Listeners can be defined at any level in the prototype chain. Thus, a listener defined in the prototype of a class will be shared by all instances of that class.
• Listeners can be ES7 async functions and it is possible to wait their completion using the await keyword.

Installation

npm install --save event-emitter-mixin

Usage

Basic usage

import EventEmitterMixin from 'event-emitter-mixin';

class Person extends EventEmitterMixin() {
  // ...
}

let person = new Person();

person.on('event', function() {
  // ...
});

person.emit('event');

Listener defined on a class prototype

import { EventEmitterMixin, on } from 'event-emitter-mixin';

class Person extends EventEmitterMixin() {
  @on event() {
    // ...
  }
}

let person = new Person();

person.emit('event');

Async listeners

import { EventEmitter, on } from 'event-emitter-mixin';

class Person extends EventEmitterMixin() {
  @on async event() {
    // ...
  }
}

let person = new Person();

person.on('event', async function() {
  // ...
});

await person.emit('event');

Using both the mixin and a superclass

import EventEmitterMixin from 'event-emitter-mixin';

class Superclass {
  // ...
}

class Klass extends EventEmitterMixin(Superclass) {
  // ...
}

License

MIT