Features

• rowHeight prop on Tree now accepts a function (node) => number in addition to a fixed number, so each row can be sized from its node. Fixed-height trees keep using react-window's FixedSizeList; the function form uses VariableSizeList. Adds a tree.redrawList() API method to recompute row offsets when a rowHeight function's output changes for reasons the tree can't observe (#341, originally #238)

Features

• outerElementType and innerElementType props on Tree for supplying custom react-window wrappers; DropContainer, ListOuterElement, and ListInnerElement are now exported so custom outers can compose the existing drop-target behavior (#339, originally #318)

Fixes

• Imperative tree.update() props no longer get reverted when a node is toggled (#337, originally #229)

Features

• disableSelect prop on Tree for marking nodes as unselectable, mirroring disableEdit and disableDrop (#331)

First release since v3.4.3 (Feb 2025).

• getTreeLinePrefix utility for rendering Unix tree-style connector lines in custom node renderers (#324, thanks @rayshoo)
• dndBackend prop on Tree for supplying a custom react-dnd backend — defaults to HTML5Backend when omitted (#326, originally #316, thanks @ofk)
• tree.selectMulti(id, opts?) now accepts an options argument ({ align?, focus? }) for consistency with tree.select (#266, thanks @paulftw)

• The dndManager prop no longer triggers unnecessary re-renders; backend/options are only passed to DndProvider when no custom manager is supplied (#237, thanks @DiyanDimitrov)

• README now documents dndBackend, the selectMulti / select options argument, and getTreeLinePrefix; drift in the TreeProps block corrected.
• Publish workflow switched to sh bin/publish so the README is copied into the published package.

All changes are backward-compatible with 3.4.x.

• React 19 support: Bump react-window to 1.8.11 by @samutoljamo-pareto in https://github.com/brimdata/react-arborist/pull/298
• Add aria-expanded attribute to rows by @lidiagc in https://github.com/brimdata/react-arborist/pull/223

• @samutoljamo-pareto made their first contribution in https://github.com/brimdata/react-arborist/pull/298
• @lidiagc made their first contribution in https://github.com/brimdata/react-arborist/pull/223

Full Changelog: https://github.com/brimdata/react-arborist/compare/v3.4.2...v3.4.3

• Fix: Deselect not firing select event by @w3dot0 in https://github.com/brimdata/react-arborist/pull/289
• Fix: Move drop logic from drag end to drop by @jameskerr in https://github.com/brimdata/react-arborist/pull/297

• @w3dot0 made their first contribution in https://github.com/brimdata/react-arborist/pull/289

Full Changelog: https://github.com/brimdata/react-arborist/compare/3.4.1...v3.4.2

• fix: showcase indexpage crash in next@14 by @GilbertSun in https://github.com/brimdata/react-arborist/pull/208
• Rename packages to modules by @jameskerr in https://github.com/brimdata/react-arborist/pull/234
• Add Docs Site Scaffold by @jameskerr in https://github.com/brimdata/react-arborist/pull/236
• chore: add dynamic sizing info from ticket to docs by @Aeolun in https://github.com/brimdata/react-arborist/pull/241
• build: Upgrade TypeScript, fix 5.6 error by @tmcw in https://github.com/brimdata/react-arborist/pull/272
• fix: expose item dragIds for DragPreview by @qkdreyer in https://github.com/brimdata/react-arborist/pull/273
• Adding minimal required readme instructions by @AndrewRayCode in https://github.com/brimdata/react-arborist/pull/278
• Bump by @jameskerr in https://github.com/brimdata/react-arborist/pull/295

• @GilbertSun made their first contribution in https://github.com/brimdata/react-arborist/pull/208
• @Aeolun made their first contribution in https://github.com/brimdata/react-arborist/pull/241
• @tmcw made their first contribution in https://github.com/brimdata/react-arborist/pull/272
• @qkdreyer made their first contribution in https://github.com/brimdata/react-arborist/pull/273
• @AndrewRayCode made their first contribution in https://github.com/brimdata/react-arborist/pull/278

Full Changelog: https://github.com/brimdata/react-arborist/compare/v3.4.0...3.4.1

• Drop as Sibling of Empty, Open Folder by @jameskerr in https://github.com/brimdata/react-arborist/pull/202

This enables trees where every node can be an internal node. Many thanks to @edimov for making this happen.

Full Changelog: https://github.com/brimdata/react-arborist/compare/v3.3.1...v3.4.0

• Added dragNode, dragDestinationParent and dragDestinationIndex methods to TreeApi @jameskerr in https://github.com/brimdata/react-arborist/pull/179
• Fix aria-level and aria role violations by @sparekh0730 in https://github.com/brimdata/react-arborist/pull/198
• Make children accessor readonly by @haines in https://github.com/brimdata/react-arborist/pull/183
• Update Build Process by @jameskerr in https://github.com/brimdata/react-arborist/pull/200

• @sparekh0730 made their first contribution in https://github.com/brimdata/react-arborist/pull/198
• @haines made their first contribution in https://github.com/brimdata/react-arborist/pull/183

Full Changelog: https://github.com/brimdata/react-arborist/compare/v3.2.0...v3.3.1