How to inherit a constructor?

Question

Angular

I don't really understand how to properly use IoC in service inheritance. There is a basic service:

export abstract class BaseService {
    protected constructor(protected httpClient: HttpClient) {}
}

I want to create an heir:

export class AuthService extends BaseService {
    getMember() {
         return this.httpClient.get('/member');
    }
}

But I can't, because httpClient property not found. In the heir, you need to add a constructor:

protected constructor(protected httpClient: HttpClient) { super(httpClient); }

And so it is with every successor. And here comes the moment that a new dependency needs to be added to BaseService. And because of this, you will have to copy-paste this dependency in all heirs. If we take the similar functionality of PHP, then there the constructor is forwarded to the heirs, and there is no need to deal with such copy-paste. Maybe I'm doing something wrong, and I need to inherit the constructor differently?

Answer 1

export abstract class BaseService {
  protected httpClient: HttpClien
}

export class AuthService extends BaseService {
    constructor(
      protected httpClient: HttpClien
    ) { super() }
}

in general this is a bad approach. BaseService is not needed.