two_way_scrollable
A set of two-way growable widgets for Flutter that properly fill the viewport.
Example

Features
TwoWayListView- anAnimatedListViewanalog that properly grows in both directions.TwoWayCustomScrollView- aCustomScrollViewanalog that properly grows in both directions.
Note: these widgets don't provide a way to customize anchor parameter value, hardcoding it to be 0. If you need a
bottom-to-top list, use reverse: true and provide list items in reverse order.
Getting started
flutter pub add two_way_scrollable