Prepending Items reverse endless scrolling scenario with GroupedVirtuoso

[osadchiynikita]

@petyosi Hello, many thanks and congratulations with v1 release! Reverse endless scrolling works as expected with plain Virtuoso list, and I'm trying to achieve the same behavior with GroupedVirtuoso, but have some issues.

1. startReached is not triggering callback for some reason. endReached works well though
2. When setting data prop list rendering not properly, seems like ignoring groups and groupCounts

https://stackblitz.com/edit/react-kjchm8-mxn3ry?file=example.js

Thank you and let me know if any other info needed!

[petyosi]

Thanks for the bug report. I am not sure how to deal with data and grouping, to be honest. What would be your intuitive API? Do you want to pass array of arrays? Do you expect to have data items for the groups?

[osadchiynikita]

@petyosi thanks for the fast feedback. Not sure I understand the issue properly, but maybe allow to pass totalCount prop for GroupedVirtuoso same as for Virtuoso. And in my case I'll pass totalCount={items.length + groups.length}

P.S. Just a minor note, probably related to the same root - firstItemIndex is not working properly without data

[github-actions]

🎉 This issue has been resolved in version 1.1.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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