# What changed in react-complex-tree

> 3 changes in react-complex-tree 2 from its official release notes, upgrade guides and advisories. Each one cited. Sources checked 2026-10-19. HTML: https://unstale.sh/npm/react-complex-tree/

To see which of these apply to a repository, run `npx @unstale/cli init` in it.

## react-complex-tree 2

### Fixes and other changes

- Fixed an issue where opening multiple items at once with async data providers could cause only one item to open. (2.6.4) — [release notes](https://github.com/lukasbach/react-complex-tree/releases/tag/2.6.4)
- Fixed a regression that caused UncontrolledTreeEnvironment to crash when the data provider resolves undefined. (2.6.4) — [release notes](https://github.com/lukasbach/react-complex-tree/releases/tag/2.6.4)
- Fixes drag and drop between trees failing after the target tree is remounted. (2.6.2) — [release notes](https://github.com/lukasbach/react-complex-tree/releases/tag/2.6.2)