diff --git a/lib/EasyDartModule.dart b/lib/EasyDartModule.dart
index e9d9c9a..b008a42 100644
--- a/lib/EasyDartModule.dart
+++ b/lib/EasyDartModule.dart
@@ -17,10 +17,13 @@ import 'package:EasyDartModule/base/webserver/impl/ShelfWebServer.dart'
 import 'package:EasyDartModule/base/websocket/WebSocket.dart';
 import 'package:event_bus/event_bus.dart';
 
-export 'package:EasyDartModule/base/language/extensions/StringExt.dart';
-
 export 'package:shelf/shelf.dart';
 export 'package:mongo_dart/mongo_dart.dart';
+export 'package:EasyDartModule/base/language/extensions/StringExt.dart'
+    if (dart.library.html) 'package:EasyDartModule/base/language/extensions/StringExtNop.dart';
+
+
+// const bool enableTr = bool.fromEnvironment('edm.tr.enable',defaultValue: true);
 
 class EasyDartModule {
   static Discovery get discovery => Discovery.getInstance();
diff --git a/lib/base/language/extensions/StringExtNop.dart b/lib/base/language/extensions/StringExtNop.dart
new file mode 100644
index 0000000..e69de29