Is it possible to introduce "Component Level Service" into the Parent Component?

Exploring the use of ViewChild in Angular has led me to want to apply Inject as well. Check out a simple example here.

I attempted to provide this service in the parent component, but ended up with a different service. Then I tried something similar like this, but I don't want to manually specify the 'provide' section in my new Modules... Is there a way to inject the service from the child instead?

Answer №1

By utilizing the read attribute, you have the ability to access an element from the injection subtree of a "child" component.

@ViewChild(ChildComponen, {read: TestService}) testS: TestService;

However, it is crucial to note that this initialization occurs during the after view init phase of the component. This can lead to the ExpressionChangedAfterItHasBeenCheckedError in development mode or result in improper reactions to updates in production mode.

While still usable, it is important to have a solid understanding of Angular's change detection and exercise caution when implementing uncommon functionalities like this.

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