Expected 0-1 arguments, but got 2.ts(2554) in Subscribe Error handler-CodePudding

we have just recently upgraded Rxjs Latest(8.0.0-alpha.5) version.And this error started appearing.

this.ReportController.ExportTableExcelBackground(model).subscribe(
            (x) => {
              this.appController.BlockApplication(false);
              if (x.IsSuccess) {
                const msgInfo = "The report will be downloaded when finished.";
                this.alertController.RegisterAlertMessage(
                  [msgInfo],
                  AlertMessageType.SUCCESS,
                  true
                );
              } else {
                this.appController.OpenErrorServerPopup(x.Message);
              }
            },
            (error: any) => {
              this.appController.BlockApplication(false);
              this.appController.OpenErrorServerPopup(error);
            }
          );

When hover on error it says Expected 0-1 arguments, but got 2 Any idea what is changed in RXJS latest version and how to fix this?

CodePudding user response：

What line in this code show the error?

Is it the subscribe() call? Observable.subscribe() declaration has changed since RxJS 7 and the way you're using it has been deprecated and in RxJS 8 removed. If you want to handle two notification types you'll need to use an observer object:

source$.subscribe({
  next: () => {},
  error: e => {},
});

Just FYI Subscribe is deprecated: Use an observer instead of an error callback.