Svelte 5 support

リンクされている Svelte 5 の最小再現から始めて、npm i --force && npm run dev を実行します。L19-L27 の workaround と $virtualizer._willUpdate() の使用箇所を調べます。手動マウントと要素バインディングのチェックがある場合とない場合の動作を比較し、その workaround なしで Svelte 5 でテーブルがレンダリングされれば issue は解決したとみなします。

Describe the bug

It's working fine in Svelte 4. I'm currently trying out the library in Svelte 5 and found my use case doesn't work.
I got an empty table with the same code. I suspect it cannot keep track of the initial element binding of the scroll element, because it works if I manually make a mounted state and call $virtualizer._willUpdate().

Your minimal, reproducible example

https://www.sveltelab.dev/github.com/rayrw/svelte5-tanstack-virtual

Steps to reproduce

I've made a minimal reproduction repo.
Please note that we have to manually run npm i --force && npm run dev before #863 is merged.
With the hack from L19-L27, it seems to work. However, when I commented out it, I got an empty table.
I suspect it cannot keep track of the initial element binding of the scroll element?

Expected behavior

I hope we can get rid of the manual mounting/element binding check and call of $virtualizer._willUpdate().

How often does this bug happen?

None

Screenshots or Videos

No response

Platform

macOS, Arc browser Version 1.65.0 (54911)
Chromium Engine Version 130.0.6723.59

tanstack-virtual version

3.10.8

TypeScript version

No response

Additional context

No response

Terms & Code of Conduct

• I agree to follow this project's Code of Conduct
• I understand that if my bug cannot be reliable reproduced in a debuggable environment, it will probably not be fixed and this issue may even be closed.