# Material UI v9.4.0

- Product: Material UI (https://whatsnew.fyi/product/material-ui)
- Vendor: MUI
- Date: 2026-08-28
- Version: v9.4.0
- Original notes: https://github.com/mui/material-ui/releases/tag/v9.4.0
- Permalink: https://whatsnew.fyi/product/material-ui/releases/v9.4.0

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **added** — Add theme.focusVisible opt-in keyboard focus ring across components
- **fixed** — Prevent sticky hover border on touch devices in buttongroup
- **added** — Complete Traditional Chinese localization
- **fixed** — Preserve custom list padding when adjusting for the scrollbar in menulist
- **fixed** — Manage focus whenever first, last, next, or previous buttons become disabled in pagination
- **fixed** — Improve support for disabled button triggers in tooltip
- **fixed** — Fix resolveProps to correctly merge slotProps defined as functions
- **changed** — Replace deprecated clip CSS property with clip-path
- **fixed** — Fix types for components extended with styled in styled-engine-sc
- **fixed** — Remove the aria-owns reference in autocomplete
- **fixed** — Fix wrong number of rows reported to screen readers in table
- **changed** — Use and document the row header cells in table
- **fixed** — Make tab panel focusable and show keep mounted examples in tabs
- **fixed** — Remove focusable links from hidden carousel slides in templates
- **fixed** — Manage focus on Open in Chat button click in docs
- **fixed** — Move focus to the main content with the skip link in docs

A big thanks to the 19 contributors who made this release possible. Here are some highlights ✨:

- ♿️ Opt in to a consistent [keyboard focus ring](https://mui.com/material-ui/customization/focus-visible/) across components with the new `theme.focusVisible`.
- ♿️ The [Tooltip](https://mui.com/material-ui/react-tooltip/) now supports disabled button triggers without an extra wrapper element.

###### `@mui/material@9.4.0`

- [theme] Add `theme.focusVisible` opt-in keyboard focus ring (#48743) @siriwatknp
- [buttongroup] Prevent sticky hover border on touch devices (#48993) @petr-kratochvil
- [l10n] Complete Traditional Chinese localization (#48946) @nrps9909
- [menulist] Preserve custom list padding when adjusting for the scrollbar (#48707) @creazyfrog
- [pagination] Manage focus whenever first / last / next / previous buttons become disabled (#48877) @silviuaavram
- [tooltip] Improve support for disabled button triggers (#48622) @mayank99

###### `@mui/utils@9.4.0`

- Fix resolveProps to correctly merge slotProps defined as functions (#48955) @mnajdova
- Replace deprecated `clip` CSS property with `clip-path` (#48966) @ZeeshanTamboli

###### `@mui/styled-engine-sc@9.4.0`

- Fix types for components extended with styled (#45988) @megos

###### Docs

- Bump @docsearch/react to ^4.7.0 (#48886) @LukasTy
- Fix broken links reported by Ahrefs (#48949) @brijeshb42
- Manage focus on Open in Chat button click (#48942) @silviuaavram
- Move focus to the main content with the skip link (#48944) @lazerg
- Use relative link for LICENSE in README (#49040) @loulanyue
- [autocomplete] Remove the "aria-owns" reference (#48958) @silviuaavram
- [table] Fix wrong number of rows reported to screen readers (#47653) @seomsoo
- [table] Reference DataGrid link in the row header section (#48988) @silviuaavram
- [table] Use and document the row header cells (#48965) @silviuaavram
- [tabs] Make tab panel focusable and show keep mounted examples (#48939) @silviuaavram
- [templates] Remove focusable links from hidden carousel slides (#49003) @gonzoblasco

###### Core

- [code-infra] Fix team sync review requests (#48914) @brijeshb42
- [code-infra] Import the test globals from vitest (#49033) @JCQuintas
- [code-infra] Point the support validator link at frontend-public (#49041) @Janpot
- [code-infra] Update CircleCI orb (#49030) @Janpot
- [code-infra] Use ESM current directory syntax for Vitest config (#49032) @ZeeshanTamboli
- [core] Use @typescript/typescript6 for the docs tooling (#49025) @Janpot
- [core-docs] Remove the `globalSelector` stylis middleware (#49029) @Janpot
- [test] Add an `assertions` mode to the axe regression harness (#48915) @michelengelen
- [test] Automate the CSS-dependent WCAG criteria (#48936) @michelengelen
- [test] Fail the regression run when a webfont does not load (#48948) @LukasTy
- [test] Fix typo 'overriden' -> 'overridden' in Alert test comment (#48987) @FirmaSpring
- [test] Replace webfontloader with the CSS Font Loading API (#48995) @LukasTy
- [test] Skip the CrudDashboard VRT on React 18 (#49027) @Janpot
- [test] Use the shared loadFonts from @mui/internal-test-utils (#49007) @LukasTy
- [test] Use the Vitest global expect instead of importing chai (#48996) @JCQuintas
- [test][tooltip] Keep the disabled trigger away from the real pointer (#48947) @LukasTy

All contributors of this release in alphabetical order: @brijeshb42, @creazyfrog, @FirmaSpring, @gonzoblasco, @Janpot, @JCQuintas, @lazerg, @loulanyue, @LukasTy, @mayank99, @megos, @michelengelen, @mnajdova, @nrps9909, @petr-kratochvil, @seomsoo, @silviuaavram, @siriwatknp, @ZeeshanTamboli