What's Changed
[!NOTE]
This release is backporting bug fixes and minor improvements. It does not include all pending features/changes on canary.
Support esmExternals in app directory
- Support esm externals in app router (#65041)
- Turbopack: Allow client components from foreign code in app routes (#64751)
- Turbopack: add support for esm externals in app dir (#64918)
- other related PRs: #66990 #66727 #66286 #65519
Reading cookies set in middleware in components and actions
- initialize ALS with cookies in middleware (#65008)
- fix middleware cookie initialization (#65820)
- ensure cookies set in middleware can be read in a server action (#67924)
- fix: merged middleware cookies should preserve options (#67956)
Metadata and icons
- support facebook-specific metadata (
fb:app_id,fb:admins) in generateMetaData (#65713) - Always collect static icons for all segments (#68712)
- Fix favicon merging with customized icons (#67982)
- Warn metadataBase missing in standalone mode or non vercel deployment (#66296)
Parallel routes fixes
- fix missing stylesheets when parallel routes are present (#69507)
Draft mode and edge improvements
- fix: unstable_cache should not cache new result in draft mode (#67772)
- Add draft mode flag for multi-zone (#68997)
- Fix edge preview props are not matched with cookie (#67779)
- other related PRs: #65426, #67787, #64946, #64313, #64370
next/image fixes
- Allow external image urls with _next/image pathname to be rendered via Image component (#69586)
Server actions improvements
- optimize server actions (#66523)
- Apply optimization for unused actions (#69178)
- Improve SWC transform ID generation (#69183)
Other changes
- Ensure we match comment minify behavior between terser and swc (#68372)
- send initialCanonicalUrl in array format to prevent crawler confusion (#69509)
Create-next-app updates
- enable @typescript-eslint/recommended in create-next-app --typescript (#52845)
- Update create-next-app template CSS (#66233)
- Update
create-next-apptemplate CSS (#66043) - Update create-next-app template (#65803)
- add font antialiasing to templates (#67425)
- Move
create-next-apppublic/ assets from local folder→ remote URL (#66931) - Use classnames to set font family in Tailwind create-next-app templates (#66374)
- other related PRs: #64478, #68899, #68534, #69021, #67146, #66145
Full Changelog: https://github.com/vercel/next.js/compare/v14.2.7...v14.2.8
Huge thanks to everyone who contributed to this release: @abhi12299, @delbaoliveira, @eps1lon, @ForsakenHarmony, @huozhi, @ijjk, @JoshuaKGoldberg, @leerob, @lubieowoce, @Netail, @ronanru, @samcx, @shuding, @sokra, @stylessh, @timfuhrmann, @wbinnssmith, @wyattjoh, @ypessoa, @ztanner