NavigationAwareScrollable does not proxy some of ScrollView methods

[ikhilko]

Current Behavior

react-navigation provides FlatList/SectionList/ScrollView with navigation aware behavior. To be able this working you are replacing underlying scroll component with wrapped into createNavigationAwareScrollable component. But looks like this broke some functionality, because VirtualizedList (used inside scrollable components provided by RN) are relying on calling some methods of scrollable via ref. Looks like wrapped into createNavigationAwareScrollable component doesn't proxy needed methods.

This actually broke some api's of underlying RN VirtualizedList: scrollToEnd, scrollToIndex, scrollToOffset, flashScrollIndicators, getScrollResponder , getScrollableNode , setNativeProps

Expected Behavior

FlatList/SectionList provided by react-navigation should provide all underlying functionality of RN scrollable's.

How to reproduce

I've prepared a demo:
https://snack.expo.io/@ikhilko/broken-api-of-scrollables

When you click on card in FlatList, I'm calling this.listRef.current.scrollToOffset method and it's broken

Your Environment

software	version
react-navigation	3.0.0-rc.5
expo	31.0.4
node	v9.11.2
npm or yarn	yarn

If you want I can create a PR, but maybe it's need to be discussed a bit here

[pontusab]

Kinda the same here: https://github.com/react-navigation/react-navigation-native/issues/4