NgModule setting provider with Object

Asked Mar 07 '18 at 12:01

Active Mar 07 '18 at 12:23

Viewed 16 times

In my NgModule i could previously set a provider using an object as per the below

 providers: [
{ <-- Object 1
  provide: HTTP_INTERCEPTORS,
  useClass: CustomHttpInterceptor,
  multi: true
},
{ <-- Object 2
  provide: SignalrWindow, 
  useValue: window 
},
AppSettings,
AuthenticationService,......

Now when i try set the providers in this manner i get an error when i use AOT compilation stating:

Invalid provider for the NgModule, - only instances of Provider and Type are allowed, got: [[object Object], [object Object] which refers to my two objects....

What is the correct way to specify this object syntax which will allow aot compilation?

edited Mar 07 '18 at 12:23

Estus Flask

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asked Mar 07 '18 at 12:01

Piotr Stulinski

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i think this comes from the not-existent `@Injectable` decorators – messerbill Mar 07 '18 at 12:03
@messerbill `@Injectable` affects how DI is performed on provider instantiation, not provider registration. – Estus Flask Mar 07 '18 at 12:14
@estus thus i have no idea why this is not working >. – messerbill Mar 07 '18 at 12:15
This is surely a problem, `useValue: window`. There's no `window` global during AOT compilation. Use `useFactory` – Estus Flask Mar 07 '18 at 12:16

NgModule setting provider with Object

0 Answers0