A component can configure dependency injection by defining the list of providers the component and its children may inject.
@Component({
selector: 'conf-app',
providers: [Logger]
})
class AppCmp { //... }
@Component({
...
})
class TalksCmp {
constructor(logger:Logger) { //... }
}
In this example, we have the logger service declared in the app component, which makes them available in the whole application. The talks component injects the logger service. I will cover dependency injection in detail in Chapter 5, Dependency Injection. For now, just remember that components can configure dependency injection.
