Angular HttpClient error handling working code

 public load(url: string = '') {

        if (url) {

            this.url = url;

        }

        this.httpClient.get<T>(this.url)

        .pipe(catchError((err: any, caught: Observable<T>): ObservableInput<T> => {

            return throwError(err);

        }))

        .subscribe((data) => {

            this.data = data

            this.onLoad.next(this.data);            

        });

    }