How do I pass data to Angular routed components?

Question

In one of my Angular 2 routes\'s templates (FirstComponent) I have a button

first.component.html

Answer 1

update 4.0.0

See Angular docs for more details https://angular.io/guide/router#fetch-data-before-navigating

original

Using a service is the way to go. In route params you should only pass data that you want to be reflected in the browser URL bar.

See also https://angular.io/docs/ts/latest/cookbook/component-communication.html#!#bidirectional-service

The router shipped with RC.4 re-introduces data

constructor(private route: ActivatedRoute) {}

const routes: RouterConfig = [
  {path: '', redirectTo: '/heroes', pathMatch : 'full'},
  {path : 'heroes', component : HeroDetailComponent, data : {some_data : 'some value'}}
];

class HeroDetailComponent {
  ngOnInit() {
    this.sub = this.route
      .data
      .subscribe(v => console.log(v));
  }

  ngOnDestroy() {
    this.sub.unsubscribe();
  }
}

See also the Plunker at https://github.com/angular/angular/issues/9757#issuecomment-229847781