The signature of a function used as a canActivateChild guard on a Route.

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type CanActivateChildFn = (childRoute: ActivatedRouteSnapshot, state: RouterStateSnapshot) => Observable<boolean | UrlTree> | Promise<boolean | UrlTree> | boolean | UrlTree;

See also

• Route

Description

If all guards return true, navigation continues. If any guard returns false, navigation is cancelled. If any guard returns a UrlTree, the current navigation is cancelled and a new navigation begins to the UrlTree returned from the guard.

The following example implements a canActivate function that checks whether the current user has permission to activate the requested route.

const canActivateChildExample: CanActivateChildFn =
    (route: ActivatedRouteSnapshot, state: RouterStateSnapshot) => {
      return inject(PermissionsService).canActivate(inject(UserToken), route.params.id);
    };

bootstrapApplication(App, {
  providers: [provideRouter([
    {
      path: 'team/:id',
      component: TeamComponent,
      canActivateChild: [canActivateChildExample],
      children: [],
    },
  ])]
});