v15.6.0-canary.22

Core Changes

• Turbopack: Fix babel-loader (allowing built-in or manual configuration): #82676
• [Cache Components] allow using headers() in runtime prefetches: #83838
• [Breaking] Remove deprecated publicRuntimeConfig and serverRuntimeConfig: #83944
• Turbopack: mode to disable tracing: #83683
• babel-loader: Fix a few issues with config caching: #83973
• Turbopack: Merge babel-loader and react-compiler configuration logic to avoid running babel twice: #83502
• [breaking]: enable router scroll optimization by default: #84102
• Fix layout for ssgPageRoutes in the file tree: #84104
• Turbopack: Remove useless 'default' built-in webpack loader condition: #84111
• Fix: Client should auto reload after server restarts: #83971
• trace-build: Add missing spans: #84080
• Development: Remove TypeScript from the hot path during bootup: #84090
• Guide users to experimental.cacheComponents config: #84121

Misc Changes

• Turbopack: parallelize scope hoisting computation: #83904
• Add test for JS resource size on navigation: #83731
• Update Rspack development test manifest: #84061
• Update Rspack production test manifest: #84060
• Turbopack: Document automatic Babel config support: #84002
• docs: Fix the title/path of the turbopack page on pages router: #84001
• Turbopack: remove references from ChunkData: #84076
• Turbopack: include availability hash in the ident of evaluated chunks groups: #84082
• [turbopack] s/analyse/analyze/g: #84112
• [Turbopack] avoid attaching referenced output assets to chunks: #75933
• fix(docs): Fix links in UPGRADING.md: #84114
• docs: improve dynamic routes example in project structure page: #84086

Credits

Huge thanks to @bgw, @lubieowoce, @devjiwonchoi, @mischnic, @vercel-release-bot, @ztanner, @lukesandberg, @gaojude, @sokra, @timneutkens, @lachlanjc, @unstubbable, and @liketiger for helping!

v15.5.4

Note

This release is backporting bug fixes. It does not include all pending features/changes on canary.

Core Changes

• fix: ensure onRequestError is invoked when otel enabled (#83343)
• fix: devtools initial position should be from next config (#83571)
• [devtool] fix overlay styles are missing (#83721)
• Turbopack: don't match dynamic pattern for node_modules packages (#83176)
• Turbopack: don't treat metadata routes as RSC (#82911)
• [turbopack] Improve handling of symlink resolution errors in track_glob and read_glob (#83357)
• Turbopack: throw large static metadata error earlier (#82939)
• fix: error overlay not closing when backdrop clicked (#83981)
• Turbopack: flush Node.js worker IPC on error (#84077)

Misc Changes

• [CNA] use linter preference (#83194)
• CI: use KV for test timing data (#83745)
• docs: september improvements and fixes (#83997)

Credits

Huge thanks to @yiminghe, @huozhi, @devjiwonchoi, @mischnic, @lukesandberg, @ztanner, @icyJoseph, @leerob, @fufuShih, @dwrth, @aymericzip, @obendev, @molebox, @OoMNoO, @pontasan, @styfle, @HondaYt, @ryuapp, @lpalmes, and @ijjk for helping!

v14.2.33

Note

This release is backporting bug fixes. It does not include all pending features/changes on canary.

Core Changes

• omit searchParam data from FlightRouterState before transport (#80734)

Credits

Huge thanks to @ztanner for helping!

v15.6.0-canary.21

Core Changes

• Allow passing port to next internal trace: #83907
• Turbopack: error when importing Typescript in node_modules: #83990
• Turbopack: Deterministic builds (prerender-manifest, .next/package.json, ./next/postcss.js): #84081

Misc Changes

• [turbopack] Consolodate logic for visiting functions to simplify state management: #82763
• [turbopack] Track the scope in which variables are assigned: #82845
• [turbopack] Set liveness of exports based on assignment analysis: #82802
• Turbopack: trace all state changes: #84053
• docs: We have dropped the CORS example linked: #84065
• docs: add pageExtensions note to Middleware and clarify default filename: #84045
• Fix TypeScript type error in example code: #84041
• Turbopack: fix test case and update project_update to turbo_tasks::run too: #83978
• Turbopack: run tests with multiple threads: #84074
• Turbopack: flush Node.js worker IPC on error: #84077

Credits

Huge thanks to @lukesandberg, @sokra, @mischnic, @icyJoseph, @Milancen123, and @martinfrancois for helping!

v15.6.0-canary.20

Core Changes

• fix: worker logs should still support color: #84024
• Update font data: #84005

Misc Changes

• Turbopack: Make transient tasks root tasks too when called in turbo_tasks::run: #83976
• Turbopack: trace state changes: #83977
• [turbopack] cleanup analyzer: #83983
• [Turbopack] Fix AST traversal for this in function default parameters: #83746

Credits

Huge thanks to @sokra, @lukesandberg, @hayes, @ztanner, and @vercel-release-bot for helping!

v15.6.0-canary.19

Misc Changes

• Update Rspack production test manifest: #83979
• Update Rspack development test manifest: #83980

Credits

Huge thanks to @vercel-release-bot for helping!

v15.6.0-canary.18

Core Changes

• Upgrade React from 84af9085-20250917 to d415fd3e-20250919: #84003

Misc Changes

• Turbopack: use depth as priority for merged module info: #83909
• Turbopack: "connect" tasks in turbo_tasks::run too: #83975

Credits

Huge thanks to @mischnic and @sokra for helping!

v15.6.0-canary.17

Core Changes

• feat: Isolate dev build from prod: #83961
• Remove JS size reporting from next build: #83815
• Docs/workspace setup: #83490
• Turbopack: support import ... with {type: "bytes"}: #83896
• fix: error overlay not closing when backdrop clicked: #83981

Misc Changes

• [turbopack] Track task durations in the task_statistics file: #83522
• [turbopack] Remove the issue_path feature and related functionality: #83920
• Turbopack: use turbo_tasks::run in next.js to avoid task memory leak: #83848
• Update Rspack production test manifest: #83934
• Update Rspack development test manifest: #83933
• Turbopack: add test case that checks memory leak: #83849
• Turbopack: read project strongly consistent in project_update: #83974
• Fix output comparison when checking conclusion of required jobs: #83986
• Turbopack: JsAnalyzer parse AssignExpr: #83962
• Turbopack: less eager manifest generation: #83736

Credits

Huge thanks to @lukesandberg, @sokra, @vercel-release-bot, @devjiwonchoi, @icyJoseph, @mischnic, and @eps1lon for helping!

v15.6.0-canary.16

Misc Changes

• Add Descope to Auth libraries list: #83968

Credits

Huge thanks to @anvibanga for helping!

v15.6.0-canary.15

Core Changes

• Remove force writing **/*.mts to tsconfig: #83967

Credits

Huge thanks to @devjiwonchoi for helping!