I have used Cordova and your question that is certainly something to always be considering when adding native features in it. However if you use proper abstract

I have used Cordova and your question that is certainly something to always be considering when adding native features in it. However if you use proper abstraction, something Dart makes a lot easier than JS, its not a huge issue. So assuming this framework is like Cordova I imagine the answer to your question is; the framework will not hinder you generating a webapp, its about how you structure your code.