RxJS Tutorial - Hello World! - Observable subscribe with object

rxjs-helloworld-subscribe-with-object.js

const { Observable } = require('rxjs');

// Create an Observable
var observable = Observable.create((observer) => {
    observer.next('Hello World!');
    observer.next('Hello Again!');
    observer.complete();
    observer.next('Bye'); // this will not be shown
});

// Subscribe to the Observable, and print stream to the console
observable.subscribe({
    next: function(x) { console.log('next: ' + x) },
    error: function(error) { console.log('error: ' + error) },
    complete: function() { console.log('completed') }
});