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Nick GerlemanandFacebook GitHub Bot
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Summary: Pull Request resolved: https://github.com/facebook/react-native/pull/38655 https://github.com/facebook/react-native/pull/35993 added logic in VirtualizedList to support `maintainVisibleContentPosition`. This logic makes sure that a previously visible cell being used as an anchor remains rendered after new content is added. The strategy here is to calculate the difference in previous and new positions of the anchor, and move the render window to its new location during item change. `minIndexForVisible` is used as this anchor. When an item change moves the anchor to a position below `minIndexForVisible`, shifting the render window may result in a window which starts before zero. This fixes up `_constrainToItemCount()` to handle this. Changelog: [General][Fixed] - Fix invariant violation when `maintainVisibleContentPosition` adjustment moves window before list start Reviewed By: yungsters Differential Revision: D47846165 fbshipit-source-id: 8a36f66fdad321acb255745dad85618d28c54dba
@react-native/virtualized-lists
Installation
yarn add @react-native/virtualized-lists
Note: We're using yarn to install deps. Feel free to change commands to use npm 3+ and npx if you like
Testing
To run the tests in this package, run the following commands from the React Native root folder:
yarnto install the dependencies. You just need to run this onceyarn jest packages/virtualized-lists.