Core Changes

• [Turbopack] gracefully stop turbo-tasks to allow persisting to complete: #69661
• fix: ensure absolute paths are handled correctly with --file option in next lint command for lint-staged compatibility: #69220
• dev-overlay: Implement CopyButton without useActionState or async transitions: #69494
• Update swc_core to v0.103.1: #69605
• Run link-ref tests in /app and /pages: #69564

Misc Changes

• Revert "docs: Fix invalid arguments for sendGTMEvent": #69653
• Revert "Revert "docs: Fix invalid arguments for sendGTMEvent"": #69654
• fix trace file reloading: #69655
• Turbopack build: Fix telemetry tests: #68969
• Revert "ci: only trigger slack webhook from canary": #69648
• ci: make inputs.skipNativeInstall do what it says : #69674
• docs: add links to search params on server/client: #69618
• refactor(turbo-tasks) Add a higher-level task-local state API for the Backend trait: #68996
• docs(usePathname): add note about using usePathname with rewrites: #69686
• chore(turbo-tasks): Move Invalidator struct from manager.rs to invalidation.rs: #69073
• [Turbopack] transient when the self argument is transient: #69657
• [Turbopack] store project options in state: #69658
• refactor(turbo-tasks): Add stubs for RawVc::TaskOutput: #68908
• fix merge conflict: #69690
• [Turbopack] use file.read() instead of file.track() in webpack loaders: #69659
• [Turbopack] no need to depend on write completion: #69660
• Update the preview tarball binaries: #69692
• docs: update note on caching and db/orms: #69695
• refactor(github): refactor triage-issues-with-ai to generateObject: #69696
• fix: Allow subset of node.js APIs for edge: #69675

Credits

Huge thanks to @timneutkens, @sokra, @ztanner, @lubieowoce, @leerob, @bgw, @samcx, @ijjk, @sommeeeer, @lumirlumir, @eps1lon, and @kdy1 for helping!

What's Changed

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-app template CSS (#66043)
• Update create-next-app template (#65803)
• add font antialiasing to templates (#67425)
• Move create-next-app public/ 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: 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

Core Changes

• Add browser devtool inspect url copy button to dev overlay: #69357
• Lazily init fetch dedupe cache: #69492
• Turbopack build: Fix middleware matchers implementation: #69602
• chore(metadata): add clarifying comment: #69549
• Remove unsupported providerImportSource option: #69609
• fix: clientComponentLoading span type: #69295
• Fix typos: #69568
• fix(eslint): allow typescript-eslint v8: #68807
• Allow external image urls with _next/image pathname to be rendered via Image component: #69586

Misc Changes

• Turbopack: emit single CSS chunk per page: #69219
• feat: Report correct errors for missing use client in global-errors.ts: #69583
• Turbopack build: Implement regions and assets field in manifest for middleware: #69534
• Docs: Rewrite cookies page to follow template, add missing methods: #69614
• Explicitly assert on errors instead of the error number: #69512
• Match peer dependencies in rsc-binary tests: #69515
• fix(scripts): correct globbing, cargo colors, patch path: #69624
• ci: only trigger slack webhook from canary: #69632
• Skip devlow benchmark step for forks: #69633
• perf: Cache Rust Regexes: #69585

Credits

Huge thanks to @mischnic, @kdy1, @timneutkens, @delbaoliveira, @eps1lon, @huozhi, @ForsakenHarmony, @samcx, @lubieowoce, @ProchaLu, @luismiramirez, @ijjk, @omahs, @theoludwig, and @abhi12299 for helping!

Core Changes

• fix: styledComponents schema: #69230

Example Changes

• docs: Use useFormState over useActionState: #69547

Misc Changes

• feat(turbopack): Use mangled export names for fake exports: #69124

Credits

Huge thanks to @leerob, @samcx, and @kdy1 for helping!

Core Changes

• fix: bump [email protected]: #69524

Credits

Huge thanks to @styfle for helping!

Example Changes

• Example: Updated the example of rewrites to utilize the App Router: #69495

Misc Changes

• fix(CI): Don't require the GRAPHITE_TOKEN secret, as it's not available in forks: #69517

Credits

Huge thanks to @bgw and @Sam-Phillemon9493 for helping!

Core Changes

• Support turbo: true option for custom server: #69464
• bugfix: aliased prefetches should flow through PPR handling: #69476

Misc Changes

• fix(turbopack-ecmascript-plugins): Accept a partial object for StyledComponentsTransformConfig: #69474
• Turbopack: JSON5 and package.json for postcss config files: #68679
• [after] duplicate test pages for edge instead of next.patch: #69477
• docs: clarify ISR behavior: #69501

Credits

Huge thanks to @bgw, @timneutkens, @mischnic, @ztanner, and @lubieowoce for helping!

Core Changes

• Introduce dynamicIO experiment: #67571
• Add module id strategy option to next config: #69319
• cleanup FlightDataPath array access/slicing: #69241
• normalize flight data after receiving server response: #69460

Example Changes

• Add cms-umbraco example: #52777

Misc Changes

• Documentation fixed: removes a confusing double negative: #69429
• docs: fix a calculation mistake: #69363
• Remove redundant code and call module_id_to_lit instead: #69430
• docs: improve no async client components page: #69440
• validate path lengths before writes and attempt to eagerly convert win paths: #69141
• build(pack-next): Add an option for the pack-next script to automate patching package.json: #69396
• Rename trace.log -> trace-turbopack to match .next/trace: #69447
• Make module IDs numbers instead of strings: #69431
• chore(CI): Use Graphite's CI Optimization Feature: #69204
• Revert "validate path lengths before writes and attempt to eagerly convert win paths": #69465
• Fix no ending quotation mark in 09-authentication blog: #69427
• Update index.mdx: #69400
• chore(github): fix tool call: #69470

Credits

Huge thanks to @amikofalvy, @yosefbeder, @gnoff, @LichuAcu, @leerob, @arlyon, @bgw, @timneutkens, @ztanner, @kjac, @woutvanderploeg, @Ocheretovich, and @samcx for helping!

Core Changes

• chore: add logs to download-swc ci job: #69425
• Upgrade React from 19.0.0-rc-f90a6bcc-20240827 to 19.0.0-rc-7771d3a7-20240827: #69417

Example Changes

• examples: Updating WordPress example to Next 14: #62447

Misc Changes

• build: Update swc_core to v0.102.0: #69389

Credits

Huge thanks to @kdy1, @huozhi, and @Bjornnyborg for helping!

Core Changes

• refactor path creation in walkTreeWithFlightRouterState: #69383
• Partial Fallback Prerendering: #68958
• Upgrade React from eb3ad065-20240822 to f90a6bcc-20240827: #69415

Example Changes

• examples: Supabase | ui.shadcn, App Router Layouts: #69308
• Fix: Example Template | with-supabase - wrong file name breaking build: #69394
• Fix/ Examples use-supabase | Multiple improvements : #69407

Misc Changes

• Change ID generation strategy: #69200
• Fix async dynamic client modules in graph traversal: #69202
• docs: clarify caching: #69391
• docs: fix link in data fetching: #69382
• Fix typo on "additonal" to "additional": #69337
• Create React sync automatically: #69314
• Fix test mode detection: #69416

Credits

Huge thanks to @LichuAcu, @leerob, @ztanner, @MildTomato, @wyattjoh, @hiro0218, and @eps1lon for helping!