findDOMNode deprecation warning with newest react 18 version

[Xellon]

Describe the bug (current behavior)

With newest React 18 version when certain iTwinUi-react components are used and app is in strict mode, an error is logged into the console: findDOMNode is deprecated in StrictMode.

The error is coming from 'react-transition-group' package that is used in WithCSSTransition component. As I understand according to issue reactjs/react-transition-group#904 this can be fixed on iTwinUI side.

Expected Behavior

No response

Link to minimal repro

No response

Steps To Reproduce

1. Create an app that is using React 18 and is wrapped in strict mode.
2. Use one of the affected components, e.g. WithCSSTransition
3. You should be seeing the error in browser console when affected component is rendered

Anything else?

No response

[mayank99]

@Xellon Thanks for reporting this issue. This is something we're aware of, and we're actually planning to remove the dependency on react-transition-group altogether.

[MartynasStrazdas]

Any news on this issue?

[mayank99]

There isn't much news, except that it is still planned. Now that React 19 has been released, we have prioritized this and other tasks related to supporting React 19.