const EventEmitter = require('events');

const emitter = new EventEmitter();

emitter.emit('my-event', { value: 'event value' });

emitter.on('my-event', (value) => {

console.log(value);

});

emitter.emit('my-event', { value: 'another value' });

emitter.on('my-event', (value) => {

console.log('i am handling it again');

});

emitter.emit('my-event', { value: 'new value' });

function handleEvent(event) {

console.log('i am handling event type: ', event.type);

}

emitter.on('event-with-type', handleEvent);

emitter.emit('event-with-type', { type: 'sync' });

emitter.removeListener('event-with-type', handleEvent);

emitter.emit('event-with-type', { type: 'sync2' });