[dependabot]

Bumps react-window from 1.8.11 to 2.4.1.

Release notes

Sourced from react-window's releases.

2.4.1

• Fix performance issues for fixed-size rows or columns with a size of 0 (e.g. a percentage size before the container has been measured). Rendering no longer computes and caches bounds for every item, and only the first item is rendered (previously the last items were rendered, or every item if the scroll offset was negative). Invalid sizes (e.g. "abc%" or negative values) are treated as 0. - #923

2.4.0

Server rendering improvements:

Features

• Add defaultScrollOffset prop to List and defaultScrollLeft/defaultScrollTop props to Grid for setting the initial scroll position. Server-rendered HTML can't be pre-scrolled, so server rendering starts at the first row and the default scroll offset is applied when the component hydrates (unless the browser has already restored a scroll position). For lists and grids that are initially empty (e.g. while data is loading), the offset is applied once they have rows.
• Add initialRowHeights option to useDynamicRowHeight for providing row heights that are known or can be estimated ahead of time (e.g. during server rendering).
• Add a server rendering page to the docs site.

Bug fixes

• Server-rendered rows with dynamic heights are now displayed in normal document flow until they have been measured, rather than being positioned using estimated heights (which caused rows to overlap or leave gaps until after hydration).
• Fix List and Grid logging useLayoutEffect warnings when server rendered with React 18.
• Fix getScrollbarSize throwing when called during server rendering; it now returns 0.

2.3.4

• Fix useDynamicRowHeight not measuring rows that set an aria-hidden attribute. - #917
• Support rendering into a different window (e.g. an iframe or a pop-up window opened with a portal). List, Grid, and useDynamicRowHeight now use the ResizeObserver, requestAnimationFrame, and document that belong to the window containing the list, rather than the globals of the window that loaded the library. - #918
  • getScrollbarSize accepts an optional ownerDocument parameter and caches the measured size separately for each document.

2.3.3

• Fix small perf regression in version 2.3.2 that caused unnecessary size calculations when scrolling beyond cached bounds dynamic sized rows/columns

2.3.2

• Improve scrollToRow accuracy for dynamic height rows
• Bugs fixes
  • Fix RTL scrolling and alignment
  • Fix stale row measurements after keyed reordering
  • Fixed dropped prop updates
  • Use fractional percentage sizing
  • Fix center alignment near list boundaries
• Performance tweaks:
  • Improve scrolling performance by calculating fixed-size visible ranges directly and searching cached variable-size bounds instead of scanning from the beginning.
  • Fixed-size jumps also avoid allocating bounds for preceding items.

2.3.1

• Grid updates direction when dir prop changes after mount

2.3.0

• Add optional rowKey prop to List and add optional rowKey/columnKey prop to Grid.

2.2.7

• Fixed a problem with project logo not displaying correctly in the README for the Firefox browser.

2.2.6

• useDynamicRowHeight should not instantiate ResizeObserver when server-rendering

... (truncated)

Changelog

Sourced from react-window's changelog.

2.4.1

• Fix performance issues for fixed-size rows or columns with a size of 0 (e.g. a percentage size before the container has been measured). Rendering no longer computes and caches bounds for every item, and only the first item is rendered (previously the last items were rendered, or every item if the scroll offset was negative). Invalid sizes (e.g. "abc%" or negative values) are treated as 0. - #923

2.4.0

Server rendering improvements:

Features

• Add defaultScrollOffset prop to List and defaultScrollLeft/defaultScrollTop props to Grid for setting the initial scroll position. Server-rendered HTML can't be pre-scrolled, so server rendering starts at the first row and the default scroll offset is applied when the component hydrates (unless the browser has already restored a scroll position). For lists and grids that are initially empty (e.g. while data is loading), the offset is applied once they have rows.
• Add initialRowHeights option to useDynamicRowHeight for providing row heights that are known or can be estimated ahead of time (e.g. during server rendering).
• Add a server rendering page to the docs site.

Bug fixes

• Server-rendered rows with dynamic heights are now displayed in normal document flow until they have been measured, rather than being positioned using estimated heights (which caused rows to overlap or leave gaps until after hydration).
• Fix List and Grid logging useLayoutEffect warnings when server rendered with React 18.
• Fix getScrollbarSize throwing when called during server rendering; it now returns 0.

2.3.4

• Fix useDynamicRowHeight not measuring rows that set an aria-hidden attribute. - #917
• Support rendering into a different window (e.g. an iframe or a pop-up window opened with a portal). List, Grid, and useDynamicRowHeight now use the ResizeObserver, requestAnimationFrame, and document that belong to the window containing the list, rather than the globals of the window that loaded the library. - #918
  • getScrollbarSize accepts an optional ownerDocument parameter and caches the measured size separately for each document.

2.3.3

• Fix a small performance regression in 2.3.2 that caused unnecessary size calculations when scrolling beyond the cached bounds of dynamically sized rows or columns. - #916

2.3.2

• Improve scrollToRow accuracy for rows with dynamic heights. - #914
• Bug fixes: - #915
  • Fix RTL scrolling and alignment.
  • Fix stale row measurements after rows are reordered with rowKey.
  • Fix updates to rowProps/cellProps being dropped when props are added or removed.
  • Support fractional percentage sizes (e.g. "33.3%") for row heights and column widths.
  • Fix "center" alignment for items near the start or end of a list.
• Performance improvements: - #915
  • Calculate the visible range directly for fixed-size items, and search cached bounds for variable-size items, instead of scanning from the first item.
  • Avoid allocating bounds for preceding items when jumping to a fixed-size item.

2.3.1

• Fix Grid not updating its layout direction when the dir prop changes after mount. - #913

2.3.0

• Add optional rowKey prop to List and optional rowKey/columnKey props to Grid. - #911

... (truncated)

Commits

• 3c12720 2.4.0 -> 2.4.1
• 7c82b01 Avoid populating cached bounds when fixed itemSize is zero (#923)
• a75f5a9 2.3.4 -> 2.4.0
• 0a5d309 Server rendering improvements (#922)
• 439cfee Update react-lib-tools dep
• 83de64f Update react-lib-tools dep
• 7ed36ac Fix typos (#919)
• 50a425e Run CI on main
• d8b21e2 Speed up e2e tests
• 21ce0f7 Remove link to 1.0 docs from README
• Additional commits viewable in compare view

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Code Review Summary

Analyzer	Status	Updated (UTC)	Details
JavaScript		Oct 23, 2026 5:33p.m.	Review ↗

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/	🔴 30	🟡 88	🟡 75	🟢 100	📄
/docs	🔴 37	🟡 87	🟡 75	🟢 100	📄
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