Super-event-emitter NPM

super-event-emitter

:hammer: Lightweight and simple interpretation of popular event management / aggregation

Motivation

I was created a blog post (in polish) about this tool: https://piecioshka.pl/blog/2016/01/29/narzedzia-swiata-super-event-emitter-js.html

Installation

npm install super-event-emitter

Usage — CommonJS

const EventEmitter = require('super-event-emitter');
// or
const { EventEmitter } = require('super-event-emitter');

Usage — ECMAScript Modules (ex. in TypeScript world)

import { EventEmitter } from "super-event-emitter";
// or
// import EventEmitter from "super-event-emitter";

class Cart extends EventEmitter {
    addProduct(product: Product) {
        this.emit('cart:addProduct', { product });
    }
}

Demo #1 — Typical object literal

const bar = {};

EventEmitter.mixin(bar);

bar.on('test', function () {
    console.log('triggered!');
}, this);

bar.emit('test');

Demo #2 — Class API from ECMAScript 2015

class Person extends EventEmitter {
    say(message) {
        this.emit('say', message);
    }
}

const p1 = new Person();

p1.on('say', function (message) {
    console.log(message); // 'I love cookie'
});

p1.say('I love cookie');