How can I handle errors in RxJS asynchronous operations?

How can I handle errors in RxJS asynchronous operations?

In RxJS, you can handle errors using the catchError operator. It allows you to catch errors in your observable streams.

Can you show me a simple example of using catchError?

Sure! Here's a basic example:

import { of, throwError } from 'rxjs';
import { catchError } from 'rxjs/operators';

const source$ = throwError('Error!');

source$.pipe(
  catchError(err => {
    console.error(err);
    return of('Error handled!');
  })
).subscribe(console.log);

What if I want to retry the operation after an error?

You can use the retry operator for that. It allows you to retry the observable a specified number of times before failing.

Can you provide an example of using retry?

Absolutely! Here's an example:

import { of, throwError } from 'rxjs';
import { retry, catchError } from 'rxjs/operators';

const source$ = throwError('Error!');

source$.pipe(
  retry(2),
  catchError(err => {
    console.error(err);
    return of('Error handled after retries!');
  })
).subscribe(console.log);