Support to scaffoldMessengerKey to show snackbar without context. about top-snackbar-flutter HOT 4 CLOSED

class MessageService {

  MessageService({
    required this.scaffoldKey,
  });
  final GlobalKey<ScaffoldMessengerState> scaffoldKey;

  void showSnackBar(Widget content) {
    scaffoldKey.currentState?.showSnackBar(
      SnackBar(content: content),
    );
  }
}

final scaffoldKey = GlobalKey<ScaffoldMessengerState>();
final messageService = MessageService(scaffoldKey: scaffoldKey);
runApp(
    MaterialApp.router(
      scaffoldMessengerKey: scaffoldKey,
    ),
);