fix(react-combobox,react-tag-picker): separate tabster logic from the base hooks

[dmytrokirpa]

Previous Behavior

The headless bundle included additional Tabster Escape-ignore attribute handling in a shared trigger slot path, which caused a bundle size regression after #36275.

New Behavior

Escape-ignore Tabster attributes are applied only where needed in Combobox, Dropdown, and TagPicker wrapper logic. This preserves Escape behavior when popup content is open while removing unnecessary shared-path overhead that affected headless bundle size.

Bundle size report is available below: #36497 (comment)

Related Issue(s)

• Regression introduced by fix: Escape in an open Combobox or Dropdown does not trigger tabster actions #36275

[github-actions]

📊 Bundle size report

Package & Exports	Baseline (minified/GZIP)	PR	Change
react-combobox Combobox (including child components)	138.149 kB 44.681 kB	138.206 kB 44.659 kB	57 B -22 B
react-combobox Dropdown (including child components)	137.905 kB 44.453 kB	137.965 kB 44.417 kB	60 B -36 B
react-components react-components: entire library	1.295 MB 326.282 kB	1.295 MB 326.427 kB	325 B 145 B
react-headless-components-preview react-headless-components-preview: entire library	268.493 kB 77.803 kB	231.503 kB 66.865 kB	-36.99 kB -10.938 kB
react-tag-picker @fluentui/react-tag-picker - package	174.01 kB 54.191 kB	174.152 kB 54.355 kB	142 B 164 B
react-timepicker-compat TimePicker	140.867 kB 46.058 kB	140.924 kB 46.053 kB	57 B -5 B

Unchanged fixtures

Package & Exports	Size (minified/GZIP)
react-components react-components: Button, FluentProvider & webLightTheme	66.297 kB 19.006 kB
react-components react-components: Accordion, Button, FluentProvider, Image, Menu, Popover	226.042 kB 68.045 kB
react-components react-components: FluentProvider & webLightTheme	39.52 kB 13.116 kB
react-portal-compat PortalCompatProvider	5.341 kB 2.146 kB

_{🤖 This report was generated against bb2471502447010277683517e3da2c1180339789}

[github-actions]

Pull request demo site: URL

[Copilot]

Pull request overview

This PR addresses a headless bundle size regression introduced by adding Tabster Escape-ignore handling in a shared trigger-slot utility. The Escape-ignore attribute is now applied only in the component wrapper layers (Combobox, Dropdown, TagPicker) where the popup-open Escape behavior is relevant, reducing overhead in the shared/headless path while preserving the Escape behavior when open.

Changes:

• Removed Tabster Escape-ignore attribute handling from the shared useTriggerSlot utility in @fluentui/react-combobox.
• Added an internal useTabsterEscapeIgnore helper hook in both @fluentui/react-combobox and @fluentui/react-tag-picker.
• Applied the helper in Combobox/Dropdown wrapper state and TagPicker Input/Button state, gated by the open state.
• Added Beachball change files for both packages.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/react-components/react-tag-picker/library/src/utils/useTabsterEscapeIgnore.ts	New internal helper to generate/merge Tabster Escape-ignore attributes.
packages/react-components/react-tag-picker/library/src/components/TagPickerInput/useTagPickerInput.tsx	Applies Escape-ignore Tabster attributes to the input root when the picker is open.
packages/react-components/react-tag-picker/library/src/components/TagPickerButton/useTagPickerButton.tsx	Applies Escape-ignore Tabster attributes to the button root when the picker is open.
packages/react-components/react-combobox/library/src/utils/useTriggerSlot.ts	Removes Escape-ignore Tabster handling from the shared trigger-slot path (bundle-size fix).
packages/react-components/react-combobox/library/src/hooks/useTabsterEscapeIgnore.ts	New internal helper to generate/merge Tabster Escape-ignore attributes.
packages/react-components/react-combobox/library/src/components/Dropdown/useDropdown.tsx	Applies Escape-ignore Tabster attributes to the Dropdown trigger button when open.
packages/react-components/react-combobox/library/src/components/Combobox/useCombobox.tsx	Applies Escape-ignore Tabster attributes to the Combobox input when open.
change/@fluentui-react-tag-picker-509b8d02-9b8f-4508-83f4-0e88760058a0.json	Patch change file for @fluentui/react-tag-picker.
change/@fluentui-react-combobox-9f5fafcd-7082-45a1-a31e-9d2605a575fb.json	Patch change file for @fluentui/react-combobox.