The current approach for JS SDK is to have 1 common package (js-sdk) the user will import and 2 specific packages (cordova-sdk and react-native-sdk) the user will also import and the common package will need.

My proposal si to do this the other way around: there will be 2 "public" sdks: cordova and react-native and each will use internally the common logic from js-sdk. This way the user only has to import the library for their platform, not 2 of them.