Because all these non native JsTypes are considered entry points to your application when they are exported and thus all code referenced by them can not be pruned and maybe some other optimization a can't be applied to it as well.
Now consider GWT libraries that use non native JsTypes to export their API to JavaScript so they can be used by an Angular UI or similar. If it would be the default then lots of apps would miss optimization opportunities just because they use the libraries and might not use any pure js at all. This is especially harmful as the flag is an all or nothing flag. So you have to explicitly decide to export to JS. in the future you should also be able to define a regex which tells the compiler which classes to export. This will be helpful if you depend on multiple such libraries but your app only needs to export one if them as well. -- J. -- You received this message because you are subscribed to the Google Groups "GWT Contributors" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit-contributors+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/google-web-toolkit-contributors/e7654865-f07e-4b45-8b82-dd8ebbb0b113%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
