Angular2 rxjs - switchmap catch error

Question

I\'d like to be able to handle any errors that error when calling this.authService.refreshToken(). Can errors be handled within the switchmap block, or how do I go

Answer 1

use the catchError method

this.authService.refreshToken()
  .pipe(
     switchMap(() => {...}),
     catchError((e) => {
       // handle e and return a safe value or re-throw
       if (isCritical(e)) {
         return throwError(e);
       }
       return of([]);
    })
  );