What are the different types of Observables in RxJS?

What are the different types of Observables in RxJS?

In RxJS, there are several types of Observables, including cold, hot, and multicast Observables. Cold Observables produce values only when subscribed to, while hot Observables produce values regardless of subscriptions. Multicast Observables share a single subscription among multiple observers.

Can you explain cold and hot Observables with examples?

Sure! A cold Observable, like of(1, 2, 3), emits values only when a subscriber connects. A hot Observable, like Subject, emits values regardless of subscriptions, meaning all subscribers receive the same emitted values.

What is a multicast Observable?

A multicast Observable allows multiple subscribers to share the same execution of the Observable. For example, using share() or publish() operators can turn a cold Observable into a multicast one.

How do I create a custom Observable?

You can create a custom Observable using the new Observable(subscriber => { ... }) constructor, where you define how values are emitted.