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This is the archived documentation for Angular v17. Please visit angular.dev to see this page for the current version of Angular.

CanActivateChildFn

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

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      type CanActivateChildFn = (childRoute: ActivatedRouteSnapshot, state: RouterStateSnapshot) => MaybeAsync<GuardResult>;
    

See also

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: [],
      },
    ]),
  ],
});