Observer pattern in javascript

observer.js

class Observer {
    constructor (name) {
        this.name = name
    }
    
    subscribe (event) {
        event.addObserver(this)
    }
    
    notify (event) {
        console.log(this.name + ' has been notified that ' + event.name + ' just came out');
    }
}

class Event {
    constructor (name) {
        this.name = name
        this.observers = []
    }
    
    addObserver (observer) {
        this.observers.push(observer)
    }
    
    notify () {
        this.observers.forEach(observer => observer.notify(this))
    }
}

let me = new Observer('sagittaracc')
let event = new Event('new video on pornhub')

me.subscribe(event)

event.notify()