const EventEmitter = require('events'); class MyEmitter extends EventEmitter { foo() { this.emit('test'); } } const myEmitter = new MyEmitter(); myEmitter.on('test', () => console.log('Yay, it works!')); myEmitter.foo(); // Yay it works!
const myEmitter = new MyEmitter(); let m = 0; myEmitter.on('event', () => { console.log(++m); }); myEmitter.emit('event'); // Prints: 1 myEmitter.emit('event'); // Prints: 2
myEmitter.on('status', (code, msg)=> console.log(`Got ${code} and ${msg}`));