This project was generated with Angular CLI version 7.1.3.
It uses:
I used this app to practice with dependency injection.
Run ng serve for a dev server. Navigate to http://localhost:4200/. The app will automatically reload if you change any of the source files.
Run ng build to build the project. The build artifacts will be stored in the dist/ directory. Use the --prod flag for a production build.
Build to Github pages
npm run build-gh
npx angular-cli-ghpages --dir=dist/MarvelDIBubling up throught the injector tree until it reaches the root injector
Application View (generated with ngrev)
It will be instantiated when ComicsService or CharactersService are instantiated.
- Global singleton.
- Lazy.
It will be instantiated when ComicsService or CharactersService are instantiated.
- Global singleton.
- Lazy.
It will be instantiated with CoreModule. Is better to use providein:'root' in messageService.
- Global singleton.
- Eager.
- No treeshake.
provideIn: ComicsServiceModule. It will be instantiated when ComicsComponent load. We can´t used ComicsModule directly because it generates circular dependencys. That´s why we use _ComicsServiceModule.
- Singleton in ComicsModule.
- Not accesible from another module
providedIn: 'root'. It will be instantiated when CharactersComponent load.
- Global singleton
- Lazy until a eager Component instantiate it.
MessageService has it´s own instance for this component using providers. In this way the opinions are particular to this component, not shared with Comics. Try to comment to see that all opinions are shown without taking into account if you are in characters or comics.