Class CustomReuseStrategy

packages/router/test/route_injector_cleanup.spec.ts:63–98

  }

  @Injectable({providedIn: 'root'})
  class CustomReuseStrategy extends BaseRouteReuseStrategy {
    storedHandles = new Map<Route, DetachedRouteHandle>();
    shouldDestroyMap = new Map<Route, boolean>();

    override shouldDetach(route: ActivatedRouteSnapshot): boolean {
      return (
        route.routeConfig?.path === 'home' ||
        route.routeConfig?.path === 'check' ||
        route.routeConfig?.path === 'child'
      );
    }

    override store(route: ActivatedRouteSnapshot, handle: DetachedRouteHandle | null): void {
      if (route.routeConfig?.path && handle) {
        this.storedHandles.set(route.routeConfig, handle);
      }
    }

    override shouldAttach(route: ActivatedRouteSnapshot): boolean {
      return !!route.routeConfig?.path && !!this.storedHandles.has(route.routeConfig);
    }

    override retrieve(route: ActivatedRouteSnapshot): DetachedRouteHandle | null {
      return this.storedHandles.get(route.routeConfig!) || null;
    }

    retrieveStoredRouteHandles(): DetachedRouteHandle[] {
      return Array.from(this.storedHandles.values());
    }

    override shouldDestroyInjector(route: Route): boolean {
      // Default to true if not specified, so we don't block destruction by default
      return this.shouldDestroyMap.has(route) ? this.shouldDestroyMap.get(route)! : true;
    }
  }

  let router: Router;
  let strategy: CustomReuseStrategy;