Using Facade Methods

To use one of these methods in your component, simply inject your facade class and call the method in the constructor, an ngOnInit or similar handler, or a custom handler:

customers.component.ts

export class CustomersComponent implements OnInit {    
    constructor(
        public customers: CustomerFacade, 
        public router: Router,
        public route: ActivatedRoute
    ) {
        this.customers.loadAll();
    }
    
    ngOnInit(): void {
        this.route.paramMap.pipe(
            filter(params => params.has('id')),
            map(params => params.get('id'))
        ).subscribe(id => this.customers.selectByKey(id));
    }
    
    select(customer: Customer): void {
        this.router.navigate(['./', customer.id]);
    }
}

Use the Async Pipe!

We highly recommend following NgRx best practices here to avoid subscribing directly to any observable on an entity facade. Instead, use the async pipe from Angular in your templates, and follow container/presenter model for your component architecture:

customers.component.html

<div class="customers" *ngIf="customers.isLoading$ | async; else #loading">
    <app-customer-list 
        [customers]="customers.all$ | async" 
        (selected)="select($event)">
    </app-customer-list>
    <app-customer-detail 
        *ngIf="(customers.current$ | async) as customer"
        [customer]="customer">
    </app-customer-detail>
</div>
<ng-template #loading>
    Loading customers...
</ng-template>