Support for React 19 as a peer dependency

[argawow]

Hi there,

Thank you for maintaining this amazing library! I recently upgraded my project to React 19 and noticed that allotment currently has peer dependency constraints for React versions ^17.0.0 || ^18.0.0.

The library appears to work perfectly with React 19 in my tests. Would you consider updating the peerDependencies to include React 19?

Let me know if I can assist with testing or providing more details. Thanks in advance!

Best regards,
Andreas

[criloz]

I am getting a lot of fatal errors Index out of bounds with react 19 and this library

[argawow]

Checked it again, everything works fine for me.

[criloz]

Checked it again, everything works fine for me.

It mostly happens when you rapidly change windows size, and/or have conditional rendering of the panels, I ended using my own solution built with react-aria because my application only have 2 panels anyway

[glebcha]

use-resize-observer will require review and/or update https://github.com/ZeeCoder/use-resize-observer/blob/master/package.json#L75

I guess we should track issue of use-resize-observer update to react 19

[DoubleDebug]

I would also really appreciate it if this library had support for React 19.

[Jun-Murakami]

I've managed to get it working with the --legacy-peer-deps option, but I think I may have to look for an alternative library.
Does anyone know of any other libraries that they would recommend?

[johnwalley]

I've released v1.20.3.

It's just a change to the peer dependencies. In particular the dependency use-resize-observer will produce conflicts for the time being when using React 19 due to it only declaring support up to React 18.

[glebcha]

@johnwalley maybe better to add pure useResizeObserver implementation mentioned in ZeeCoder/use-resize-observer#108 (comment) ?

[GusevP]

@johnwalley I've checked that we can just change use-resize-observer that is not maintained to the same hook useResizeObserver with the same interface from usehooks-ts. So that it's fully compatible with react 19.
There is a PR #865

[glebcha]

Long time passed since my investigation and proposal with easy fix. Consider to fork react-resplit and add React 19 support or use forked and published package.

react-resplit api and implementation is much better.