How do I use routing with resolve in Angular CLI?

How do I use routing with resolve in Angular CLI?

In Angular, you can use the resolve property in your route configuration to fetch data before the route is activated. This ensures that the data is available when the component loads.

Can you show me an example of how to set this up?

Sure! First, create a resolver service that implements Resolve<T>. Then, in your routing module, add the resolver to the route like this:

const routes: Routes = [
  {
    path: 'example',
    component: ExampleComponent,
    resolve: { data: ExampleResolver }
  }
];

What if I need to handle errors in the resolver?

You can handle errors in the resolver by returning an observable that catches errors. For example:

resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<Data> {
  return this.dataService.getData().pipe(
    catchError(error => {
      // Handle the error
      return of(null);
    })
  );
}

Is there a way to show a loading indicator while the data is being fetched?

Yes, you can use a loading spinner in your component. Set a loading flag to true when the route is activated and set it to false once the data is resolved.