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RxJS throwError event not directed to handler?

By : Zakaria Elkasri
Date : October 17 2020, 08:10 PM
seems to work fine It is not the second argument but the second callback of susbscribe which receives the errror. Have your "login" like this:
code :
login(username: string, password:string) {
  this.authenticate(username, password).subscribe(
    user => {
      this.ostore.put(USER_KEY, user);
      this.ostore.put(AUTHENTICATION_ERROR_KEY, false);
    error => {
      console.log("Storing the Error");

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Angular 7 (RxJs 6.x) - How to use throwError

By : user2415309
Date : March 29 2020, 07:55 AM
around this issue I want use second param (error) on my subcriber but dot not work. , From the documentation : throwError
code :
obs.error(error || new Error('Server error'));

How to use Rxjs switchMap to throwError

By : user2768284
Date : March 29 2020, 07:55 AM
hope this fix your issue fetch won't throw error for you

How to delay throwError with RxJS?

By : Hybird Lerion
Date : March 29 2020, 07:55 AM
I wish this helpful for you Rxjs error is exception, it stop immediately the stream and let you catch it to react to something un expected. I guess you have no way to manipulate throwError stream except with catchError
Solution 1: Manipulate stream before throw the error.
code :
const throwingObservable = throwError(new Error('My Error'));
timer(5000).pipe(mergeMap(e => throwingObservable))
  .subscribe((value) => console.log(value), (error) => console.error(error));
  // We catch the error, we delay by adding timer stream, then we mergeMap to the error.
  catchError(e => timer(1000).pipe(mergeMap(t => throwError(e)))
)).subscribe(console.log, console.error);

RxJS throwError's error not show in the subscribe's error handler

By : user3528110
Date : March 29 2020, 07:55 AM
will be helpful for those in need throwError would return an Observable and mapping would simply make the original value wrapped in two Observables.
Try returning an Observable wrapping the number instead of simply returning a number outside if. You can use of to do it.
code :
import { interval, throwError } from "rxjs";
import { of } from "rxjs";
import { take, switchMap } from "rxjs/operators";

    switchMap(x => {
      if (x > 0) {
        // throw new Error("error");
        return throwError(x);
      return of(x);
    data => {
      console.log("data------>", data);
    error => {
      console.log("error------>", error);

Custom global error handler not hit when http error response is re-thrown by rxjs throwError

By : Bader Ali Jayousi
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Aim: to have a global error handler for server errors and app errors (produced in Typescript code).
code :
export class ErrorHandlingModule { 
  static forRoot(): ModuleWithProviders {
    return {
      ngModule: ErrorHandlingModule,
      providers: [
        {provide: ErrorHandler, useClass: ErrorsHandler},
        {provide: HTTP_INTERCEPTORS, useClass: HttpErrorInterceptor, multi: true} ]
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