A big thanks to the 21 contributors who made this release possible. Here are some highlights ✨:

• 🚀 Added the Popup component to Base UI (#37960) @michaldudak It's intended to replace the Popper component, which uses the deprecated Popper JS library. The Popup is built on top of Floating UI and has a similar API to the Popper.
• 🚀 Added the Accordion component to Joy UI (#38164) @siriwatknp
• 🚀 Added InputBase and ButtonBase components to material-next (#38319) @DiegoAndai @mj12albert
• 🔋 First iteration on the zero-runtime styling engine compatible with Server Components (#38378) @brijeshb42

@mui/material@5.14.6

• [Modal] Update it to use the useModal hook (#38498) @mnajdova
• [Select] Add root class to SelectClasses (#38424) @sai6855
• [Skeleton] Soften the pulse animation (#38506) @oliviertassinari
• [TextField] Fix onClick regressions handling changes (#38474) @mj12albert
• [TextField] Fix TextField onClick test (#38597) @mj12albert

@mui/base@5.0.0-beta.12

• [Popup] New component (#37960) @michaldudak

@mui/joy@5.0.0-beta.3

• [Accordion] Add Joy UI Accordion components (#38164) @siriwatknp
• [Select] Add required prop (#38167) @siriwatknp
• Miscellaneous fixes (#38462) @siriwatknp

@mui/material-next@6.0.0-alpha.98

• [ButtonBase] Add ButtonBase component (#38319) @DiegoAndai
• [Input] Add InputBase component (#38392) @mj12albert

@mui/zero-runtime@0.0.1-alpha.0

• Implementation of styled tag processor for linaria (#38378) @brijeshb42

Docs

• [blog] Clarify tree view move @oliviertassinari
• [docs] Improve the "Understanding MUI packages" page images (#38619) @danilo-leal
• [docs][base-ui] Revise the structure of the Component docs (#38529) @samuelsycamore
• [docs][base-ui] Fix Menu Hooks demo (#38479) @homerchen19
• [docs][base-ui] Correct the MUI System quickstart example (#38496) @michaldudak
• [docs][base-ui] Add Tailwind & plain CSS demos for Autocomplete page (#38157) @mj12albert
• [docs][base-ui] Add Tailwind CSS + plain CSS demo on the Input page (#38302) @alisasanib
• [docs][base-ui] Add Tailwind CSS + plain CSS demo on the Snackbar, Badge, Switch pages (#38425) @alisasanib
• [docs][base-ui] Add Tailwind CSS + plain CSS demo on the Slider page (#38413) @alisasanib
• [docs][base-ui] Add Tailwind CSS + plain CSS demo on the Select page (#38367) @alisasanib
• [docs][joy-ui] Fix typo: Classname -> Class name for consistency (#38510) @alexfauquette
• [docs][joy-ui] Revise the theme color page (#38402) @danilo-leal
• [docs][joy-ui] Sort templates by popularity (#38490) @oliviertassinari
• [docs][joy-ui] Fix the fullWidth prop description for the Input (#38545) @0xturner
• [docs][joy-ui] Updated the List playground demo (#38499) @zanivan
• [docs][joy-ui] Changed bgcolor of the Playground demo (#38502) @zanivan
• [docs][material-ui] Fix key warning in SimpleDialog demo (#38580) @ZeeshanTamboli
• [docs][material-ui] Fixed Google Fonts link for material two-tone icons in CodeSandbox and Stackblitz (#38247) @ZeeshanTamboli
• [docs][material-ui] Fix the Drawer's onClose API docs (#38273) @johnmatthiggins
• [docs][material-ui] Improve nav link tab example (#38315) @oliviertassinari
• [docs][material-ui] Fix missing import in the styled engine guide (#38450) @codersjj
• [docs][material-ui][Dialog] Improve screen reader announcement of Customized Dialog (#38592) @ZeeshanTamboli
• [docs] Add 3rd party libraries integration examples for Joy Input (#38541) @siriwatknp
• [docs] Hide translation call to action (#38449) @cristianmacedo
• [docs] Fix codemod name in changelog of v5.14.4 (#38593) @GresilleSiffle
• [docs] More space for theme builder (#38532) @oliviertassinari
• [docs] Fix the math symbol of the width sx prop range @oliviertassinari
• [docs] Fix typo on a11y section of Tabs @oliviertassinari
• [docs] Clarify System peer dependencies @oliviertassinari
• [docs] Fix horizontal scrollbar @oliviertassinari
• [docs] Code style convention @oliviertassinari
• [docs] Fix typo in Base UI @oliviertassinari
• [docs] Update the backers page (#38505) @danilo-leal
• [docs] Add stray design adjustments to the docs (#38501) @danilo-leal
• [docs] Use IBM Plex Sans in Tailwind CSS demos (#38464) @mnajdova
• [docs] Fix SEO issues reported by ahrefs (#38423) @oliviertassinari

Examples

• [examples] Start to remove Gatsby (#38567) @oliviertassinari
• [examples][joy-ui] Fix Joy UI example CLI (#38531) @oliviertassinari
• [examples][joy-ui] Improve example when using Next Font (#38540) @mwskwong

Core

• [CHANGELOG] Fix issues in highlight @oliviertassinari
• [core] Remove redundant @material-ui/ aliases from regression test webpack config (#38574) @ZeeshanTamboli
• [core] Fix CI error @oliviertassinari
• [core] Remove unnecessary Box (#38461) @oliviertassinari
• [core] Set GitHub Action top level permission @oliviertassinari
• [docs-infra][joy-ui] Polish the usage and CSS vars playgrounds (#38600) @danilo-leal
• [docs-infra] Support link title (#38579) @oliviertassinari
• [docs-infra] Fix ad layout shift (#38622) @oliviertassinari
• [docs-infra] Add light tweaks to the ad container (#38504) @danilo-leal
• [docs-infra] Fix anchor scroll without tabs (#38586) @oliviertassinari
• [docs-infra] Retain velocity animation speed (#38470) @oliviertassinari
• [docs-infra] Follow import and CSS token standard (#38508) @oliviertassinari
• [docs-infra] Add icon to callouts (#38525) @alexfauquette
• [docs-infra] Fix the anchor link on headings (#38528) @danilo-leal
• [docs-infra] Cleanup code on demo code block expansion (#38522) @ZeeshanTamboli
• [docs-infra] Improve the heading buttons positioning (#38428) @danilo-leal
• [docs-infra] Customize the blockquote design (#38503) @danilo-leal
• [docs-infra] Improve the alert before a negative feedback (#38500) @danilo-leal
• [docs-infra] Fix GoogleAnalytics missing event for code copy (#38469) @alexfauquette
• [docs-infra] Improve affordance on the code block expansion (#38421) @danilo-leal
• [website] Fine-tune the branding theme buttons (#38588) @danilo-leal
• [website] Improve the Base UI hero section demo (#38585) @danilo-leal
• [website] Add stray design improvements to the Material UI page (#38590) @danilo-leal
• [website] Fix mobile view Material UI page (#38568) @oliviertassinari
• [website] Fix reference to the data grid @oliviertassinari
• [website] Configure Apple Pay @oliviertassinari
• [website] Fix template link on the homepage (#38471) @danilo-leal

All contributors of this release in alphabetical order: @0xturner, @alexfauquette, @alisasanib, @brijeshb42, @codersjj, @cristianmacedo, @danilo-leal, @DiegoAndai, @GresilleSiffle, @homerchen19, @johnmatthiggins, @michaldudak, @mj12albert, @mnajdova, @mwskwong, @oliviertassinari, @sai6855, @samuelsycamore, @siriwatknp, @zanivan, @ZeeshanTamboli