[release] v9.1.0 (#48620)

silviuaavram · web-flow · commit a389a2d9bc2a · 2026-06-08T11:23:54.000+03:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,89 @@
 # [Versions](https://mui.com/material-ui/getting-started/versions/)
 
+## 9.1.0
+
+<!-- generated comparing v9.0.1..master -->
+
+_Jun 8, 2026_
+
+A big thanks to the 15 contributors who made this release possible. Here are some highlights ✨:
+
+- ⚙️ Support for the [prefers-reduced-motion](https://mui.com/material-ui/transitions/#reduced-motion) setting.
+- ♿️ Improved support for Windows High Contrast mode with the [enhanceHighContrast](https://mui.com/material-ui/customization/palette/#windows-high-contrast-mode) theme wrapper.
+
+### `@mui/material@9.1.0`
+
+- [autocomplete] Enable clearing highlight when mouse leaves popup (#48354) @mj12albert
+- [autocomplete] Fix `freeSolo` controlled values cleared by initial `null` (#48611) @mj12albert
+- [autocomplete] Fix item removal when it receives focus from VoiceOver before using Backspace (#48572) @silviuaavram
+- [autocomplete] Fix `resetHighlightOnMouseLeave` JSdoc (#48536) @mj12albert
+- [autocomplete] Guard against null inputRef during unmount (#48617) @noam3127
+- [badge] Add `aria-hidden` to badge content and polish docs demos (#48471) @mj12albert
+- [badge] Use inline CSS variables for anchorOrigin/overlap positioning (#48549) @siriwatknp
+- [button] Fix customized flex gap styles (#48542) @mj12albert
+- [dialog] Fix unwanted `DialogPaper` focus ring (#48535) @mj12albert
+- [focus trap] Fix incorrect tab order when `tabIndex >= 1` (#48546) @mj12albert
+- [progress] Show runtime errors only once (#48591) @silviuaavram
+- [select] Allow spacebar to select elements (#48615) @silviuaavram
+- [select] Support typeahead when closed (#48563) @mj12albert
+- [step button] Choose higher contrast ripple color for dark mode focus (#48612) @silviuaavram
+- [stepper] Include StepConnector inside Step element (#48492) @silviuaavram
+- [stepper] Proper support for vertical alternativeLabel (#48485) @silviuaavram
+- [tabs] Fix React 18 roving tabindex and dedupe invalid-value warning (#48605) @Janpot
+- [theme] Add HighContrast theme enhancer (#48319) @silviuaavram
+- [timeline item] Fix extra ::before spacing when TimelineOppositeContent is present (#46663) @tyalau
+- [tooltip] Prevent stuck-open tooltip when child becomes disabled (#48606) @Janpot
+- [transitions] Custom `Transition` component (#48325) @mj12albert
+- [transitions] Support `prefers-reduced-motion` (#48357) @mj12albert
+
+### `@mui/utils@9.1.0`
+
+- [utils] Prevent prototype pollution in fastDeepAssign (#48580) @Janpot
+
+### Docs
+
+- [docs] Add function `slotProps` documentation (#48574) @mj12albert
+- [docs] Clarify styled-components version compatibility (#48533) @nightt5879
+- [docs] Fix broken URLs (#48520) @oliviertassinari
+- [docs] Fix invalid JSON in Zed MCP setup example (#48490) @pavan-sh
+- [docs] Mention release version for enhanceHighContrast (#48609) @silviuaavram
+- [docs] Remove outdated MUI X v8 notification (#48600) @cherniavskii
+- [docs] Remove redundant enhanceHighContrast information (#48632) @silviuaavram
+- [docs-infra] Decrease loaded bundle size on docs (#48584) @brijeshb42
+- [docs-infra] Drop multi-locale plumbing from API pages (#48370) @brijeshb42
+- [docs-infra] Fix Cookie banner heading (#48529) @oliviertassinari
+- [docs-infra] Infinitely cache all static assets (#48627) @brijeshb42
+- [docs-infra] Remove outdated noSEOadvantage entries (#48527) @oliviertassinari
+- [docs-infra] Restore build-only invariant throws via `NEXT_RUNTIME` guard (#48475) @Janpot
+- [docs-infra] Test HTML validation in broken links checker (#48088) @Janpot
+- [docs][icons] Fix Font Awesome Chip demo in dark mode (#48576) @siriwatknp
+- [docs][icons] Remove redundant font awesome demo (#48493) @ZeeshanTamboli
+- [docs][modal] Add nested modal guidance (#46507) @JakeSaterlay
+- [docs][stepper] Fix focus management in examples (#48494) @silviuaavram
+
+### Core
+
+- Eslint markdown (#48371) @Janpot
+- [agents] Fix some docs links (#48561) @silviuaavram
+- [blog] Copy editing improvement on v9 announcement blog posts (#48543) @joserodolfofreitas
+- [code-infra] Cleanup unused jss packages (#48590) @brijeshb42
+- [code-infra] Collapse canary workflows into nightly and nightly-cron (#48556) @Janpot
+- [code-infra] Convert @mui/private-theming to TypeScript (#48565) @Janpot
+- [code-infra] Convert @mui/styled-engine to TypeScript (#48544) @Janpot
+- [code-infra] Convert @mui/styled-engine-sc to TypeScript (#48577) @Janpot
+- [code-infra] Fix duplicate resource_class in test_regressions CI job (#48601) @LukasTy
+- [code-infra] Make @mui/internal-docs-utils compatible with TypeScript 6 (#48594) @Janpot
+- [code-infra] Migrate CircleCI jobs to Gen2 resource classes (#48593) @LukasTy
+- [code-infra] Parallelize visual regression screenshots (#48557) @Janpot
+- [code-infra] Run nightly-cron on v7.x (#48579) @Janpot
+- [core] Fix typescript@next typecheck (#48587) @Janpot
+- [pnpm] Add security settings to pnpm-workspace.yaml (#48582) @Janpot
+- [styled-engine-sc] Fix compatibility with Vite and Vitest (#48558) @mj12albert
+- [test] Add axe-core tests for mui-material (#48341) @siriwatknp
+- [test] Configure Tailwind CSS in the visual-regression app (#48575) @Janpot
+
+All contributors of this release in alphabetical order: @brijeshb42, @cherniavskii, @JakeSaterlay, @Janpot, @joserodolfofreitas, @LukasTy, @mj12albert, @nightt5879, @noam3127, @oliviertassinari, @pavan-sh, @silviuaavram, @siriwatknp, @tyalau, @ZeeshanTamboli
+
 ## 9.0.1
 
 <!-- generated comparing v9.0.0..master -->
diff --git a/package.json b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/monorepo",
-  "version": "9.0.1",
+  "version": "9.1.0",
   "private": true,
   "scripts": {
     "preinstall": "npx only-allow pnpm",
diff --git a/packages-internal/api-docs-builder/package.json b/packages-internal/api-docs-builder/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/internal-api-docs-builder",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "scripts": {
     "test": "pnpm --workspace-root test:unit --project \"*:@mui/internal-api-docs-builder\"",
     "typescript": "tsc -p tsconfig.json",
diff --git a/packages-internal/core-docs/package.json b/packages-internal/core-docs/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/internal-core-docs",
-  "version": "9.0.1",
+  "version": "9.1.0",
   "author": "MUI Team",
   "description": "MUI Docs - Documentation building blocks.",
   "license": "MIT",
diff --git a/packages-internal/docs-utils/package.json b/packages-internal/docs-utils/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/internal-docs-utils",
-  "version": "3.0.4",
+  "version": "3.0.5",
   "author": "MUI Team",
   "description": "Utilities for MUI docs. This is an internal package not meant for general use.",
   "repository": {
diff --git a/packages-internal/markdown/package.json b/packages-internal/markdown/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/internal-markdown",
-  "version": "3.0.8",
+  "version": "3.0.9",
   "author": "MUI Team",
   "description": "MUI markdown parser. This is an internal package not meant for general use.",
   "main": "./index.mjs",
diff --git a/packages-internal/scripts/package.json b/packages-internal/scripts/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/internal-scripts",
-  "version": "3.0.7",
+  "version": "3.0.8",
   "author": "MUI Team",
   "description": "Utilities supporting MUI libraries build and docs generation. This is an internal package not meant for general use.",
   "license": "MIT",
diff --git a/packages/mui-codemod/package.json b/packages/mui-codemod/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/codemod",
-  "version": "9.0.1",
+  "version": "9.1.0",
   "author": "MUI Team",
   "description": "Codemod scripts for Material UI.",
   "license": "MIT",
diff --git a/packages/mui-core-downloads-tracker/package.json b/packages/mui-core-downloads-tracker/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/core-downloads-tracker",
-  "version": "9.0.1",
+  "version": "9.1.0",
   "author": "MUI Team",
   "description": "Internal package to track number of downloads of our design system libraries.",
   "license": "MIT",
diff --git a/packages/mui-envinfo/package.json b/packages/mui-envinfo/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/envinfo",
-  "version": "2.0.49",
+  "version": "2.0.50",
   "author": "MUI Team",
   "description": "Logs info about the environment relevant to @mui/*.",
   "license": "MIT",
diff --git a/packages/mui-icons-material/package.json b/packages/mui-icons-material/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/icons-material",
-  "version": "9.0.1",
+  "version": "9.1.0",
   "author": "MUI Team",
   "description": "Material Design icons distributed as SVG React components.",
   "license": "MIT",
diff --git a/packages/mui-lab/package.json b/packages/mui-lab/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@mui/lab",
   "//": "version should be 'alpha' at all time",
-  "version": "9.0.0-beta.3",
+  "version": "9.0.0-beta.4",
   "author": "MUI Team",
   "description": "Laboratory for new Material UI modules.",
   "license": "MIT",
diff --git a/packages/mui-material-nextjs/package.json b/packages/mui-material-nextjs/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/material-nextjs",
-  "version": "9.0.1",
+  "version": "9.1.0",
   "author": "MUI Team",
   "description": "Collection of utilities for integration between Material UI and Next.js.",
   "license": "MIT",
diff --git a/packages/mui-material-pigment-css/package.json b/packages/mui-material-pigment-css/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/material-pigment-css",
-  "version": "9.0.1",
+  "version": "9.1.0",
   "author": "MUI Team",
   "description": "A wrapper over Pigment CSS that provides the same styled and theming APIs as Material UI.",
   "license": "MIT",
diff --git a/packages/mui-material/package.json b/packages/mui-material/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/material",
-  "version": "9.0.1",
+  "version": "9.1.0",
   "author": "MUI Team",
   "description": "Material UI is an open-source React component library that implements Google's Material Design. It's comprehensive and can be used in production out of the box.",
   "license": "MIT",
diff --git a/packages/mui-private-theming/package.json b/packages/mui-private-theming/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/private-theming",
-  "version": "9.0.1",
+  "version": "9.1.0",
   "author": "MUI Team",
   "description": "Private - The React theme context to be shared between `@mui/styles` and `@mui/material`.",
   "license": "MIT",
diff --git a/packages/mui-styled-engine-sc/package.json b/packages/mui-styled-engine-sc/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/styled-engine-sc",
-  "version": "9.0.1",
+  "version": "9.1.0",
   "author": "MUI Team",
   "description": "styled() API wrapper package for styled-components.",
   "license": "MIT",
diff --git a/packages/mui-styled-engine/package.json b/packages/mui-styled-engine/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/styled-engine",
-  "version": "9.0.0",
+  "version": "9.1.0",
   "author": "MUI Team",
   "description": "styled() API wrapper package for emotion.",
   "license": "MIT",
diff --git a/packages/mui-system/package.json b/packages/mui-system/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/system",
-  "version": "9.0.1",
+  "version": "9.1.0",
   "author": "MUI Team",
   "description": "MUI System is a set of CSS utilities to help you build custom designs more efficiently. It makes it possible to rapidly lay out custom designs.",
   "license": "MIT",
diff --git a/packages/mui-utils/package.json b/packages/mui-utils/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mui/utils",
-  "version": "9.0.1",
+  "version": "9.1.0",
   "author": "MUI Team",
   "description": "Utility functions for React components.",
   "license": "MIT",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml

Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`{`
`2`	`2`	`"name": "@mui/monorepo",`
`3`		`- "version": "9.0.1",`
	`3`	`+ "version": "9.1.0",`
`4`	`4`	`"private": true,`
`5`	`5`	`"scripts": {`
`6`	`6`	`"preinstall": "npx only-allow pnpm",`
Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`{`
`2`	`2`	`"name": "@mui/internal-api-docs-builder",`
`3`		`- "version": "1.0.1",`
	`3`	`+ "version": "1.0.2",`
`4`	`4`	`"scripts": {`
`5`	`5`	`"test": "pnpm --workspace-root test:unit --project \"*:@mui/internal-api-docs-builder\"",`
`6`	`6`	`"typescript": "tsc -p tsconfig.json",`
Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`{`
`2`	`2`	`"name": "@mui/internal-core-docs",`
`3`		`- "version": "9.0.1",`
	`3`	`+ "version": "9.1.0",`
`4`	`4`	`"author": "MUI Team",`
`5`	`5`	`"description": "MUI Docs - Documentation building blocks.",`
`6`	`6`	`"license": "MIT",`
Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`{`
`2`	`2`	`"name": "@mui/internal-docs-utils",`
`3`		`- "version": "3.0.4",`
	`3`	`+ "version": "3.0.5",`
`4`	`4`	`"author": "MUI Team",`
`5`	`5`	`"description": "Utilities for MUI docs. This is an internal package not meant for general use.",`
`6`	`6`	`"repository": {`
Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`{`
`2`	`2`	`"name": "@mui/internal-markdown",`
`3`		`- "version": "3.0.8",`
	`3`	`+ "version": "3.0.9",`
`4`	`4`	`"author": "MUI Team",`
`5`	`5`	`"description": "MUI markdown parser. This is an internal package not meant for general use.",`
`6`	`6`	`"main": "./index.mjs",`
Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`{`
`2`	`2`	`"name": "@mui/internal-scripts",`
`3`		`- "version": "3.0.7",`
	`3`	`+ "version": "3.0.8",`
`4`	`4`	`"author": "MUI Team",`
`5`	`5`	`"description": "Utilities supporting MUI libraries build and docs generation. This is an internal package not meant for general use.",`
`6`	`6`	`"license": "MIT",`
Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`{`
`2`	`2`	`"name": "@mui/codemod",`
`3`		`- "version": "9.0.1",`
	`3`	`+ "version": "9.1.0",`
`4`	`4`	`"author": "MUI Team",`
`5`	`5`	`"description": "Codemod scripts for Material UI.",`
`6`	`6`	`"license": "MIT",`
Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`{`
`2`	`2`	`"name": "@mui/core-downloads-tracker",`
`3`		`- "version": "9.0.1",`
	`3`	`+ "version": "9.1.0",`
`4`	`4`	`"author": "MUI Team",`
`5`	`5`	`"description": "Internal package to track number of downloads of our design system libraries.",`
`6`	`6`	`"license": "MIT",`
Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`{`
`2`	`2`	`"name": "@mui/envinfo",`
`3`		`- "version": "2.0.49",`
	`3`	`+ "version": "2.0.50",`
`4`	`4`	`"author": "MUI Team",`
`5`	`5`	`"description": "Logs info about the environment relevant to @mui/*.",`
`6`	`6`	`"license": "MIT",`