This is for adding components that move along with the webview.
It allows you to make incremental migration from web app to React Native app. The migration will go smoothly when you have a state management. All you need to do at that point is to send store to the native side with postMessage() and you can start migrating other logics and converting components for mobile platform
No npm package has been published yet but I'm working on releasing it.
I'm getting the scroll position based on js injected code and Post message. I'd have to write some native code to fix the issue.