What are RxJS Observables and how do they work?

What are RxJS Observables and how do they work?

RxJS Observables are a way to manage asynchronous data streams in JavaScript. They allow you to subscribe to data changes and react to them.

Can you give me an example of how to create an Observable?

Sure! You can create an Observable using the new Observable() constructor. For example:

import { Observable } from 'rxjs';

const myObservable = new Observable(subscriber => {
  subscriber.next('Hello');
  subscriber.next('World');
  subscriber.complete();
});

How do I subscribe to an Observable?

You can subscribe to an Observable using the subscribe() method. For example:

myObservable.subscribe({
  next(x) { console.log(x); },
  error(err) { console.error('Error: ' + err); },
  complete() { console.log('Done'); }
});

What are some common operators used with Observables?

Some common operators include map, filter, and mergeMap. These operators help you transform and combine Observables.