How do I use resolve in Angular routing with Angular CLI?

How do I use resolve in Angular routing with Angular CLI?

To use resolve in Angular routing, you need to create a resolver service that implements the Resolve interface.

Can you show me an example of a resolver service?

Sure! Here's a simple example:

import { Injectable } from '@angular/core';
import { Resolve, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
import { Observable } from 'rxjs';
import { DataService } from './data.service';

@Injectable({ providedIn: 'root' })
export class DataResolver implements Resolve<any> {
  constructor(private dataService: DataService) {}

  resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<any> {
    return this.dataService.getData();
  }
}

How do I add this resolver to my routes?

You can add the resolver to your routes like this:

const routes: Routes = [
  {
    path: 'data',
    component: DataComponent,
    resolve: { data: DataResolver }
  }
];

What happens if the resolver fails?

If the resolver fails, the navigation will be canceled, and you can handle the error in your component or redirect to an error page.