Which @angular/* package(s) are relevant/related to the feature request?

common/http
(

Description

There is a potential issue where the program tries to access properties of null without proper type inference
Programmer should infer type for this:

        error: (res: HttpErrorResponse) => {
         // check if res extends ApiErrorResponse interface
          if (this.apiValidator.isApiErrorResponse(res)) {
            this.onError(res.error.errorCode);
          }
        },

Proposed solution

Change

readonly error: any | null;

to

readonly error: undefined;

Alternatives considered

No alternatives