Angular 4 – setting withCredentials on every request – cors cookie

You can use an HttpInterceptor.

@Injectable()
export class CustomInterceptor implements HttpInterceptor {

    constructor() {
    }

    intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {

        request = request.clone({
            withCredentials: true
        });

        return next.handle(request);
    }
}

Next you have to provide it:

@NgModule({
  bootstrap: [AppComponent],
  imports: [...],
  providers: [
    {
      provide: HTTP_INTERCEPTORS,
      useClass: CustomInterceptor ,
      multi: true
    }
  ]
})
export class AppModule {}

Source and full explanation