I was working on a package
https://pub.dev/packages/oauth2
This oauth2 package is marked web on pub.dev
However, this package uses url_launcher, and url_launcher does not work with web
If you look at the oauth2 package and attempt to run the example via
flutter run -d chrome,
You'll see that the code hangs in the canLaunch(url) code in lib/oauth.dart

    if (await canLaunch(url)) {
      await launch(url);
    } else {
      throw 'Could not launch $url';
    }
  }

The function never returns.