Angular2 Service Pattern for configurability and reusability

sertice.ts

// Standard Service Class
export class MyService {
  constructor(private config) { }
}

// factory for creating new instances of the service
function createMyService(config = {}) {
  return new MyService(config);
}

// service provider to provide configuration for service when provided through DI
// THis is really the only angulary bit here
function provideMyService(config) {
  return [
    {
      provide: MyService,
      useFactory() {
        return createMyService(config);
      }
    }
  ]
}