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Alex Hunt 35f6ed1146 Update SectionList to accept React elements for separators (#53599 )

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/53599

Runtime and types fix for the `ItemSeparatorComponent` prop on `virtualized-list` components (`FlatList`, `SectionList`, `VirtualizedList`).

- Docs source, where this prop (adjacent to other `*Component` props) is documented as accepting elements: https://reactnative.dev/docs/virtualizedlist#itemseparatorcomponent.
- Existing runtime behaviour matching this definition: https://github.com/facebook/react-native/blob/8d33e1c205b12fe27f4319e6566bb0c088197810/packages/virtualized-lists/Lists/VirtualizedListCellRenderer.js#L197-L203

**Changes**

- Update Flow, manual TS type defs.
- Align runtime behaviour in `VirtualizedSectionList` to add matching `React.isValidElement()` behaviour.

Resolves https://github.com/facebook/react-native/issues/53531.

Changelog:
[General][Fixed] - The `ItemSeparatorComponent` prop on list components now accepts a React element as well as a component function.

Reviewed By: cortinico

Differential Revision: D81675423

fbshipit-source-id: 3eed93b1bea89554988d6e20fa61b72e17be55df

2025-09-12 07:54:04 -07:00

Lists

Update SectionList to accept React elements for separators (#53599 )

2025-09-12 07:54:04 -07:00

Utilities

RN: Flowify packages/virtualized-lists (#51785 )

2025-06-04 12:03:52 -07:00

index.d.ts

Reconnect VirtualizedList Source History 2/2 (Apply D41745930 + history, D42805202, D43063551)

2023-02-06 20:00:19 -08:00

index.js

Expose ListViewToken type as root export (#53539 )

2025-09-01 08:39:22 -07:00

package.json

Sync React 19.1.1 into React Native (#52887 )

2025-07-29 08:05:38 -07:00

README.md

Add missing READMEs & Update package.json in all RN packages (#37090 )

2023-04-28 04:26:20 -07:00

README.md

@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:

yarn to install the dependencies. You just need to run this once
yarn jest packages/virtualized-lists.