Virtualized list wrapper keeps stale height after data changes
维护者通常 1 天内回复
还没有人认领这个 Issue。
评估
- 难度
- 2/5
- 预计耗时
- 1-3 小时
- 新手友好度
- 55/100
- Issue 类型
- 缺陷
- 描述清晰度
- 基本清楚
- 活跃度
- 冷清
- 技术栈
- react, typescript
- 领域
- frontend, performance
调研方向
首先定位使用 useWindowVirtualizer 的 List 组件，并检查 rows.length 和 getTotalSize() 如何影响 wrapper style。将行为与 commit da4a20196356fd7d96e0fb9b69be9bd662294eeb 进行比较，并复现一次筛选或分页变更。当 wrapper 高度和滚动条能够反映更新后的行数，且没有多余的空白区域时，即完成。
由索引模型根据 Issue 内容生成。
描述
Describe the bug
Summary
List uses useWindowVirtualizer for row virtualization, but the outer div’s inline
height is read directly from rowVirtualizer.getTotalSize() during render. Because the
virtualizer instance is stable and the getter mutates internal state without changing referential
identity, React never receives a new height value when the rows array is filtered or otherwise
resized. The wrapper therefore preserves an outdated, overly tall height, leaving a large blank
spacer below the visible rows and causing scroll position jumps.
Impact
Any operation that changes the number of rows (search, filters, pagination reset) leaves the
list container at its previous height. Users see excessive empty space and the scroll bar no
longer reflects the actual result size.
Root Cause
getTotalSize() is invoked inline inside JSX. The virtualizer recomputes its measurement cache,
but React doesn’t detect that the returned string (e.g., "32000px") should change because the
component never re-renders with a different computed value tied to the rows count.
Fix in my case
Memoize the total height using useMemo(() => rowVirtualizer.getTotalSize(), [rowVirtualizer, rows.length]) and pass that memoized number to the style prop. This forces a fresh height
string whenever the virtualizer’s count changes, keeping the spacer in sync. Implemented in commit
Your minimal, reproducible example
https://github.com/kosovatools/kosovatools.org/commit/da4a20196356fd7d96e0fb9b69be9bd662294eeb
Steps to reproduce
.
Expected behavior
Height react to count change
How often does this bug happen?
Every time
Screenshots or Videos
No response
Platform
Firefox
tanstack-virtual version
3.13.12
TypeScript version
5.7.3
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.
- 主要语言
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TanStack/virtual 的其他 Issue
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measureElement caches 0 size for nodes that aren't attached yet (Vue: rows stack at start 0 and the list scrolls away on mount)可能已有人在做 @webn00b 于 10 天前认领。 未关闭
难度 2/5 1-3 小时 新手友好度 78/100
维护者通常 1 天内回复
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难度 4/5 3-5 天 新手友好度 55/100
TanStack/virtual#1290 · 1 条评论 ·
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virtual-core: desktop Safari drops the prepend anchor write when history lands during the top rubber-band bounce可能已有人在做 关联的 PR 仍在进行中或已合并。 未关闭
难度 5/5 一周以上 新手友好度 38/100
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难度 4/5 3-5 天 新手友好度 55/100
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