Thanks for contributing to react-virtualized!

Before submitting a pull request, please complete the following checklist:

• The existing test suites (npm test) all pass
• For any new features or bug fixes, both positive and negative test cases have been added
• For any new features, documentation has been added
• For any documentation changes, the text has been proofread and is clear to both experienced users and beginners.
• Format your code with prettier (yarn run prettier).
• Run the Flow typechecks (yarn run typecheck).

Here is a short checklist of additional things to keep in mind before submitting:

• Please make sure your pull request description makes it very clear what you're trying to accomplish. If it's a bug fix, please also provide a failing test case (if possible). In either case, please add additional unit test coverage for your changes. :)
• Be sure you have notifications setup so that you'll see my code review responses. (I may ask you to make some adjustments before merging.)

Since update to React 19-rc.1 (which is part of the latest NextJS 15) these functionalities started to fail (at least in the app we have). These changes helped avoid usages of findDOMNode that has been removed as well as defaultProps which didn't have an effect "from outside" all these settings were empty. Cannot say it's complex support for the latest React, but it's a great start.