Passing data through Angular2 router: a comprehensive guide

I am currently developing a web application with the latest version of Angular (Angular v2.0.0). In my app, I have a sub-navigation and I want to pass data to a sub-page that loads its own component through the router-outlet.

According to Angular 2 documentation, one way to achieve this is by including a sub-page directive in the main component template. However, this approach doesn't suit my requirements.

Instead, I would like to implement something like the following:

app.routes.ts

export const routes: RouterConfig = [
    { path: '/', redirectTo: '/one' },
    { path: '/one', as: 'One', component: OneComponent },
    { path: '/two', as: 'Two', component: TwoComponent },
    { path: '/three', as: 'Three', component: ThreeComponent }
];

export const APP_ROUTER_PROVIDERS = [
    provideRouter(routes)
];

main.component.ts

@Component({
    moduleId: module.id,
    selector: 'main',
    templateUrl: 'main.component.html'
})

export class MainComponent {
    maindata: Object = {name:'jim'};
}

main.component.html

<h1>Home</h1>   
<a [router-link]="['./sub1']">One</a> | 
<a [router-link]="['./sub2']">Two</a> | 
<a [router-link]="['./sub3']">Three</a>   
<hr/>  
<router-outlet [data]="maindata"></router-outlet>

one.component.ts

@Component({
    moduleId: module.id,
    selector: 'one',
    inputs: ['data'],
    templateUrl: 'one.html'
})

export class OneComponent {
    @Input() data;
}

one.component.html

<h2>{{ data.name }}</h2>
...

Would appreciate guidance on how to achieve this setup with Angular 2.

Answer №1

If you want to pass data directly into a component through the route, you can do so using resolvers. The first step is to register the resolver:

@NgModule({
  ...
  providers: [
    ExampleService,
    {
      provide: 'bar',
      useValue: () => {
        return {
          msg: 'Something something something else'
        };
      }
  ]
})
export class AppModule {}

Next, utilize it in the routes:

export const AppRoutes: Routes = [
  ...
  { 
    path: '/two',
    component: TwoComponent,
    resolve: {
      bar: 'bar'
    }
  }
];

Lastly, integrate it in the component itself:

@Component()
export class TwoComponent implements OnInit {

  bar;

  constructor(private route: ActivatedRoute) {}

  ngOnInit() {
    this.bar = this.route.snapshot.data['bar'];
  }
}

For further information, check out this ThoughtRam post

Answer №2

One way to pass arguments is by specifying them in the URL structure, such as 'user/:id' for a user link. These arguments can then be retrieved later on. Additionally, @Input() and @Output() annotations can be used.

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