Unable to use before having navigator in context

[Vasiliy Ditsyak]

Hi @sososdk. Thanks for your work.
I'm trying to use this lib to display no connection popup
I need to place the Flash call before having navigator in context(i'm using auto_route lib)

MaterialApp.router(
        builder: (context, child) => Connection(child: child),
      )

I cannot use custom Overlay because Flash fails by trying to call to navigator
https://github.com/sososdk/flash/blob/master/lib/flash.dart#L94

[Vasiliy Ditsyak]

Connection component pushes custom overlay into widget tree
At this moment there is no Navigator in context
So the Flash fails with error despite all requirements to operate are satisfied

[sososdk]

Hi @vasilich6107 , you can get the context from navigatorKey.

/// Copy from: https://github.com/Milad-Akarie/auto_route_library/blob/e5ff8b91e1/auto_route/example/lib/mobile/main.dart
class _MyAppState extends State<MyApp> {
  final authService = AuthService();
  
  final navigatorKey = GlobalKey<NavigatorState>();

  late final _rootRouter = RootRouter(
      navigatorKey
      // authGuard: AuthGuard(),
      );

  @override
  Widget build(BuildContext context) {
    return MaterialApp.router(
      theme: ThemeData.dark(),
      routerDelegate: _rootRouter.delegate(),
      routeInformationProvider: _rootRouter.routeInfoProvider(),
      routeInformationParser: _rootRouter.defaultRouteParser(),
      builder: (_, router) {
        return ChangeNotifierProvider<AuthService>(
          create: (_) => authService,
          child: BooksDBProvider(
            child: router!,
          ),
        );
      },
    );
  }
}

[Vasiliy Ditsyak]

This could be a possible fix.
But isn't is easier and less verbose to make small Flash code adjustments?

[sososdk]

#39 changed the meaning of 'persistent'.

When the persistent is false, we must ensure that there is an Overlay that is not rootOverlay.

[Vasiliy Ditsyak]

actually there is still a check at line 100
I just added silencing of the error.

For now my code works, thanks for your help.
It is up to you whether to merge the PR or close it.

[Vasiliy Ditsyak]

I'm closing this issue for now