Angular 2: getting RouteParams from parent component

Question

How do I get the RouteParams from a parent component?

App.ts:

@Component({
  ...
})

@RouteConfig([
  {path: \'/\', component: HomeCompo         


        

Answer 1

You shouldn't try to use RouteParams in your ChildOneComponent.

Use RouteRegistry, instead!

@Component({
  ...
})

export class ChildOneComponent {

  public username: string;

  constructor(registry: RouteRegistry, location: Location) {
    route_registry.recognize(location.path(), []).then((instruction) => {
      console.log(instruction.component.params['username']);
    })
  }


  ...
}

UPDATE: As from this pull request (angular beta.9): https://github.com/angular/angular/pull/7163

You can now access to the current instruction without recognize(location.path(), []).

Example:

@Component({
  ...
})

export class ChildOneComponent {

  public username: string;

  constructor(_router: Router) {
    let instruction = _router.currentInstruction();
    this.username = instruction.component.params['username'];
  }

  ...
}

I haven't tried it, yet

Further details here:

https://github.com/angular/angular/blob/master/CHANGELOG.md#200-beta9-2016-03-09 https://angular.io/docs/ts/latest/api/router/Router-class.html

UPDATE 2: A small change as from angular 2.0.0.beta15:

Now currentInstruction is not a function anymore. Moreover, you have to load the root router. (thanks to @Lxrd-AJ for reporting)

@Component({
  ...
})

export class ChildOneComponent {

  public username: string;

  constructor(_router: Router) {
    let instruction = _router.root.currentInstruction;
    this.username = instruction.component.params['username'];
  }

  ...
}