Inject parent component of the same type as child component

Question

In Angular 2, a child component can get its parent component injected through a constructor parameter. Example:

@Component({...})
export class ParentComponen         


        

Answer 1

Angular2 looks into the current injector for a provider. In your case, TreeNodeComponent corresponds to the component itself.

The parent component instance is located into the parent injector.

I think that you could try to inject an Injector class to have access to the parent injector and then get the instance of the parent component. Something like that:

@Component({
  (...)
})
export class TreeNodeComponent {
  constructor(injector:Injector) {
    let parentInjector = injector.parent;
    let parent = patentInjector.get(TreeNodeComponent);
  }
}

See this link for the documentation of the Injector class:

• https://angular.io/docs/ts/latest/api/core/Injector-class.html

That said, I think that the Gunter's comment about binding and shared service is particularly relevant...