I'm seeking to know what would be best practice, when developing an Angular application with Firebase as a backend. Most tutorials and alike doesn't use firebase calls as a service, but run them directly in the component. Is this how you should handle using firebase in angular? since i'm thinking it would be more usefull to make services to fetch/update certain data on Firebase, since it would be reuseable across multiple components.
also, if you have any litterature or links on using firebase as a service (angular4 with Angularfire2), It would be greatly apprecieated