There was a time when I frequently heard the term "shared services" in relation to sharing data between unrelated components in Angular. However, I started questioning whether every service is actually classified as a shared service or not. If it is considered one, then what sets it apart from the concept of true shared services?
The key difference between shared and local services lies in where they are included:
In app.module - shared globally across all components
In module B - shared only with child modules of module B
In component providers (@Component({providers: [...]})) - available locally and destroyed with the component
By using a component decorator, you have the ability to offer a specific service exclusively within that component.
@Component({
selector: 'app-my-component',
templateUrl: './my-component.component.html',
providers: [MyService]
})
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