findDOMNode is deprecated in StrictMode

[pimartin]

Package: @mantine/core
Version: 1.2.1
Codesandbox: https://codesandbox.io/s/recursing-kepler-vzdm8?file=/src/App.js

Hi,
I have started using mantine and it works great, but when using React.StrictMode, a warning is printed in the console when a tooltip is triggered:

Warning: findDOMNode is deprecated in StrictMode. findDOMNode was passed an instance of Transition which is inside StrictMode. Instead, add a ref directly to the element you want to reference. Learn more about using refs safely here: https://reactjs.org/link/strict-mode-find-node

It appears to be linked to Transition (which I do not use directly in my code).

[rtivital]

Thanks for reporting, this is known issue with react-transition-group – reactjs/react-transition-group#687

We need to implement new logic for ref usage as shown in 4.0.0 release

[rtivital]

Fixed in 2.3.0