Method attach

packages/router/src/directives/router_outlet.ts:363–369

* Called when the `RouteReuseStrategy` instructs to re-attach a previously detached subtree

(ref: ComponentRef<any>, activatedRoute: ActivatedRoute)

   * Called when the `RouteReuseStrategy` instructs to re-attach a previously detached subtree
   */
  attach(ref: ComponentRef<any>, activatedRoute: ActivatedRoute): void {
    this.activated = ref;
    this._activatedRoute = activatedRoute;
    this.location.insert(ref.hostView);
    this.inputBinder?.bindActivatedRouteToOutletComponent(this);
    this.attachEvents.emit(ref.instance);
  }

  deactivate(): void {
    if (this.activated) {