fix(react-headless-components-preview): provide MenuSplitGroup's context - #36669
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renderMenuSplitGroup falls back to menuSplitGroupContextDefaultValue when no contexts argument is supplied, and MenuSplitGroup supplies none. useIsInMenuSplitGroup compares against that default by identity, so it returns false for every descendant of a headless MenuSplitGroup. The visible effect is in useMenuItemBase's useIconAndCheckmarkAlignment: a submenu trigger inside a split group is supposed to drop its icon and checkmark gutters, and instead keeps them, widening one half of the group by the gutter plus the row gap whenever the surrounding MenuList sets hasIcons or hasCheckmarks. Pass the state's own context value so the identity differs from the default. The setMultiline it carries stays a no-op: the multiline attribute remains a styling concern for consumers, as documented on the hook. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_013wmpBCYJpDJCLXcScCWz1i
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Aj9uA3rCVgosnh2zNn8qkc
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The headless
MenuSplitGroupcallsrenderMenuSplitGroup(state)with no contexts argument.useIsInMenuSplitGroupcompares the context value it receives against the module-level default by identity, so with nothing provided the comparison is always false and no descendant can tell it is inside a split group. The user-visible consequence is that the gutter suppression a split group is supposed to apply — the icon and checkmark columns the trigger half drops in the Griffel-styled equivalent — never fires, because it is gated on exactly this hook.The fix provides the contexts argument, memoized on
state.setMultilineso the identity is stable across renders (an inline object literal would defeat the comparison in the other direction, re-firing every render).setMultilineitself stays the documented no-op — this changes what descendants can observe, not what the group does.Fixes #36651.
Extracted from #36656 per maintainer request — each in-tree fix from that PR as an isolated change.