initial code

.dart_tool/dartpad/web_plugin_registrant.dart

@@ -0,0 +1,18 @@
+// Flutter web plugin registrant file.
+//
+// Generated file. Do not edit.
+//
+
+// @dart = 2.13
+// ignore_for_file: type=lint
+
+import 'package:connectivity_plus/src/connectivity_plus_web.dart';
+import 'package:shared_preferences_web/shared_preferences_web.dart';
+import 'package:flutter_web_plugins/flutter_web_plugins.dart';
+
+void registerPlugins([final Registrar? pluginRegistrar]) {
+  final Registrar registrar = pluginRegistrar ?? webPluginRegistrar;
+  ConnectivityPlusWebPlugin.registerWith(registrar);
+  SharedPreferencesPlugin.registerWith(registrar);
+  registrar.registerMessageHandler();
+}