How do Observables improve API call handling in Angular

Question

With the help of an example, can u please tell me how Observables improve API call handling in Angular?

Answer 1

Observables enhance API call management in Angular by offering a robust and versatile means of handling asynchronous data streams. Here are the ways they enhance API call management:

1. Asynchronous Handling

Observables provide easy handling of asynchronous operations (such as API calls), enabling you to process data that comes in over time without blocking the UI.

2. Multiple Emissions

In contrast to Promises (which settle once), Observables can produce more than one value over time and are therefore particularly suited for APIs that return data streams (such as WebSocket connections or real-time updates).

3. Transformation Operators

RxJS offers a large set of operators (such as map, filter, switchMap, catchError) to easily transform, filter, or merge API responses.

4. Lazy Execution

Observables are lazy, which means they run only when subscribed to. This guarantees API calls are made only when necessary.

5. Cancellation

Subscriptions can be unsubscribed to cancel in-progress API calls, avoiding memory leaks and unnecessary network requests.