feat(react-button): expose useSplitButtonBase_unstable base hook - #36524
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feat(react-button): expose useSplitButtonBase_unstable base hook#36524Victor Genaev (mainframev) wants to merge 5 commits into
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…c base hook Splits SplitButton's internal logic into two layers: - useSplitButtonBase_unstable: design-agnostic base hook (no appearance/shape/ size), producing ARIA-wired root/menuButton/primaryActionButton slots with placeholder 'button' element metadata. - useSplitButton_unstable: styled wrapper that composes the base hook and recreates both child slots via slot.optional with the concrete Button/ MenuButton element types and styling defaults. Also widens renderSplitButton_unstable to accept SplitButtonBaseState so it can be reused directly by headless consumers instead of being duplicated. Adds SplitButtonBaseProps/SplitButtonBaseSlots/SplitButtonBaseState, exported from the SplitButton and package root barrels, together with a bundle-size fixture. This unblocks a future headless SplitButton built directly on the base hook.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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📊 Bundle size report
Unchanged fixtures
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🕵🏾♀️ visual changes to review in the Visual Change Report
vr-tests-react-components/Menu 2 screenshots
| Image Name | Diff(in Pixels) | Image Type |
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| vr-tests-react-components/Menu.Nested Submenus Small Viewport Stacked.nested menu.chromium.png | 1008 | Changed |
| vr-tests-react-components/Menu.Nested Submenus Small Viewport Flipped.nested menu.chromium.png | 699 | Changed |
vr-tests-react-components/Menu Converged - submenuIndicator slotted content 2 screenshots
| Image Name | Diff(in Pixels) | Image Type |
|---|---|---|
| vr-tests-react-components/Menu Converged - submenuIndicator slotted content.default - RTL.submenus open.chromium.png | 404 | Changed |
| vr-tests-react-components/Menu Converged - submenuIndicator slotted content.default.submenus open.chromium.png | 413 | Changed |
vr-tests-react-components/Positioning 2 screenshots
| Image Name | Diff(in Pixels) | Image Type |
|---|---|---|
| vr-tests-react-components/Positioning.Positioning end.updated 2 times.chromium.png | 747 | Changed |
| vr-tests-react-components/Positioning.Positioning end.chromium.png | 910 | Changed |
vr-tests-react-components/ProgressBar converged 2 screenshots
| Image Name | Diff(in Pixels) | Image Type |
|---|---|---|
| vr-tests-react-components/ProgressBar converged.Indeterminate + thickness - High Contrast.default.chromium.png | 110 | Changed |
| vr-tests-react-components/ProgressBar converged.Indeterminate + thickness.default.chromium.png | 160 | Changed |
vr-tests-react-components/TagPicker 2 screenshots
| Image Name | Diff(in Pixels) | Image Type |
|---|---|---|
| vr-tests-react-components/TagPicker.disabled - Dark Mode.disabled input hover.chromium.png | 658 | Changed |
| vr-tests-react-components/TagPicker.disabled.disabled input hover.chromium.png | 677 | Changed |
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Summary
PR 2 of a 3-PR stack. Base: #36523.
Extracts a design-agnostic
useSplitButtonBase_unstablebase hook (plusSplitButtonBaseProps/SplitButtonBaseSlots/SplitButtonBaseState) out of the styleduseSplitButton_unstable, so a future headlessSplitButton(PR 3) can compose the same behavior with headlessButton/MenuButtoninstead of the styled ones.Stack:
@fluentui/react-buttonbase-hook extractionfeat/split-button-headless— headlessSplitButton(base: this branch)What changed
SplitButton.types.ts: addedSplitButtonBaseSlots,SplitButtonBaseProps,SplitButtonBaseState— component-agnostic, typed againstButtonBaseProps/MenuButtonBasePropsinstead of concreteButton/MenuButton. Existing styled types (SplitButtonSlots/SplitButtonProps/SplitButtonState) are unchanged.useSplitButton.ts: addeduseSplitButtonBase_unstable, which owns all design-agnostic behavior (generated primary-action id,aria-labelledbyfallback naming, disabled/disabledFocusable propagation, icon propagation). RefactoreduseSplitButton_unstableto call the base hook and recreate both child slots viaslot.optionalwith the styledButton/MenuButtonelement types (production rendering resolves each slot's element type from itsSLOT_ELEMENT_TYPE_SYMBOLmetadata, not fromstate.components, so recreating rather than patchingstate.componentsis required).useSplitButtonBase.test.tsx(16 tests) for the new base contract.useSplitButtonBase.fixture.jsbundle-size fixture.react-button.api.md.No behavior change to the styled
SplitButton/useSplitButton_unstable— the regression tests added in #36523 continue to pass unmodified.