v15.3.0

Core Changes

• [dev-overlay] Customize <select> styling for consistency: #76973
• Upgrade React from 029e8bd6-20250306 to 0ca3deeb-20250311: #76989
• [metadata]: add pinterest meta tag: #76988
• [dev-overlay] ensure stripping overlay bundle in prod build: #76976
• Apply env inlining during generate build mode: #76990
• Turbopack: Implement deploymentId: #76904
• track persistent caching usage: #76996
• [metadata] re-insert icons to head for streamed metadata: #76915
• Upgrade React from 0ca3deeb-20250311 to 6aa8254b-20250312: #77033
• Move static-env imports: #77035
• [dev-overlay] Add size setting to preferences: #77027
• Add config for only generating static env: #77038
• chore(HMR clients): Clean up and share code between app and pages router: #76960
• Add dev warning for cross-origin and stabilize allowedDevOrigins: #77044
• unify allowed origin detection handling: #77053
• Handle hash change in all files for static env: #77058
• [dev-overlay] highlight errored code line for runtime errors: #77078
• NFT: Ignore all of Webpack: #77081
• Add experimental build mode flag for env: #77089
• (feat) support client-side instrumentation: #76916
• Fix JSDoc comment for 'seconds' cache life profile: #77084
• refactor(HMR clients): Encapsulate some of the turbopack state tracking into a shared TurbopackHmr class: #76994
• Slightly improve error handling for unknown server actions: #77135
• Fix output standalone for alternative bundler: #76971
• Add alternate bundler plugin information to next info: #77059
• [metadata] remove the default segement check for metadata rendering: #77119
• [dev-overlay] Fix stacking order of highlighted line: #77189
• Upgrade React from 6aa8254b-20250312 to 5398b711-20250314: #77129
• fix(styled-jsx): Pass useLightningcss option to styled-jsx correctly: #77008
• log the instrumentation-client execution time: #77121
• Turbopack: canary-gate production builds: #77146
• [dev-overlay] remove special handling for missing tag error : #77147
• chore(react-dev-overlay): Remove confusingly underscored variables in useErrorOverlayReducer: #77205
• Update middleware request header: #77201
• Update default allowed origins list: #77212
• Ensure deploymentId is used for CSS preloads: #77210
• chore(HMR clients): Fix a bunch of typescript errors by including the appropriate webpack type declarations: #77207
• Update cache handler interface: #76687
• Turbopack: don't include AMP optimizer in NFT: #77242
• Server actions should not read stale data after calling revalidate*: #76885
• [dev-overlay] Blur fader for scrollable container: #77196
• Make revalidate* work when followed by a redirect in a route handler: #77090
• feat: onNavigate for link: #77209
• fix: pass telemetry plugin rspack tests: #77257
• feat(eslint-plugin): add minimal built-in flat presets: #73873
• [perf] skip loading client manifest for static metadata routes: #77260
• Upgrade React from 5398b711-20250314 to c69a5fc5-20250318: #77249
• [ppr] Handle failed resume data cache entries: #77258
• Bypass "use cache" caches when Draft Mode is enabled: #77141
• chore(HMR clients): Clean up tryApplyUpdates, reduce differences between app/pages versions: #77219
• Upgrade React from c69a5fc5-20250318 to db7dfe05-20250319: #77295
• Turbopack: layout segment optimization for Pages: #74815
• [dev-overlay] Make footer sticky without side effects: #77327
• Alternate bundler: show state in app info message: #77259
• Revert "Turbopack: layout segment optimization for Pages": #77339
• [metadata] add Yeti to html limited bots: #77335
• [dev-overlay] Remove unused code from pages: #77325
• [metadata] remove dead code of metadata routes handling: #77336
• Alternate bundler: pass more tests and update to 1.3.0-beta: #77269
• [metadata] fix the metadata route like pages and refactor utils: #77264
• fix: absolute assetPrefix url with path: #77256
• clean up useReducer code re dev indicator: #77354
• test: ensure that router identity stays stable when navigating: #77356
• [dev-overlay] Remove unused fields from hydration error state: #77332
• Turbopack: implement optimized css production chunking: #77284
• only log when instrumentation client takes too long: #77378
• switch development origin verification to be opt-in rather than opt-out: #77395
• remove direct ip/port bypass in dev origin check: #77414
• ensure /__next middleware URLs are included in the origin check: #77416
• exclude images and static media from dev origin check: #77417
• Refactor metadata and viewport preloading: #77400
• [dev-overlay] Remove unused fields from unhandled error action event: #77333
• Turbopack: Add --turbopack for next start: #77442
• Update README: #77464
• Remove unnecessary indirections around dispatch-related methods: #77423
• Lift public router instance to module level : #77426
• directly import param resolver in metadata: #77401
• [metadata] always serve streaming metadata in build: #77437
• directly import search param resolver in metadata: #77402
• Remove forwardRef from Link in App Router: #77471
• Match subrequest handling for edge and node: #77474
• Add deprecation warning for legacyBehavior prop: #77473
• feat: useLinkStatus: #77300
• [dynamicIO] Avoid memory leak warning for hanging promises: #77480
• [dev-overlay] Remove "Unhandled Runtime Error" label: #77484
• Upgrade React from db7dfe05-20250319 to 740a4f7a-20250325: #77507
• Upgrade React from 740a4f7a-20250325 to 313332d1-20250326: #77527
• Do not call expireTags/getExpiration unnecessarily: #77570
• fix(jest): stricter regex for 'server-only' in default config: #77588
• Fix: RESTORE_ACTION should not be thenable: #77582
• Use NEXT_PRIVATE_DEBUG_CACHE env variable for cache handler debug logs: #77585
• fix: make sure body can be read using nodejs runtime in middleware: #77553
• Update alternate bundler and pass more tests : #77579
• Refactor build scripts and rewrite pack-next in TypeScript: #77536
• fix isCsrfOriginAllowed handling for localhost: #77594
• Turbopack build: fix deterministic build test: #77618
• Turbopack build: Fix urlencoding test: #77622
• [og] fix vercel og build issue on windows: #77650
• [Segment Cache] Add "client-only" option: #77655
• Remove useSyncExternalStore from useIsDevRendering: #77651
• Track navigation timestamp on CacheNode: #77251
• Upgrade @playwright/test and cleanup internal APIs: #77659
• Refactor: move "use cache" revalidation logic out of incremental cache: #77577
• Remove obsolete update of implicit tags expiration after server action: #77595
• Revert "Remove useSyncExternalStore from useIsDevRendering (#77651)": #77672
• Upgrade React from 313332d1-20250326 to 63779030-20250328: #77643
• Turbopack build: Add marker for when a build used Turbopack: #77674
• feat(images): use experimental isrFlushToDisk option to prevent writing optimized images to cache: #70645
• doc: instrumentation-client: #77649
• Alternate bundler: use equivalent native plugins for built-in plugins: #77355
• Resolve Viewport separately from Metadata: #77427
• fix(turbopack): Suppress logging for short no-op turbopack HMRs: #76924
• Turbopack build: Fix node-file-trace test: #77641
• Turbopack build: Implement error when using next start without --turbopack: #77678
• legacyBehavior deprecation error should only trigger once: #77687
• Pass only required props to NonIndex: #77685
• Revert "fix: make sure body can be read using nodejs runtime in middleware": #77690
• [dev-overlay] Harden types when handling hydration mismatches: #77334
• [dev-overlay] Fix ref warning when Pages Router with React 18 is used: #77726
• add support for cssmodules-pure-no-check to allow global CSS features like View Transitions: #77321
• [dev-overlay] Only warn once per invalid sourcemap: #77444
• [dynamicIO] only abort once per prerender: #77747
• Turbopack build: Move Turbopack marker to SERVER_FILES_MANIFEST: #77711
• Reapply "Turbopack: layout segment optimization for Pages" (#77339): #77696
• feat(next/image): support new URL() for images.remotePatterns: #77692
• [dev-overlay] remove text wrap for terminal: #76953
• Upgrade React from 63779030-20250328 to 040f8286-20250402: #77742
• Optimize server runtime bundles: #77723
• Turbopack Build: Remove cases of process.env.TURBOPACK: #77757
• [dev-overlay] Fix unactionable useLayoutEffect warning if React 18 is used: #77737
• [dev-tools] Fix flashing of disabled state on indicator: #77727
• Webpack build: Add compiled in x seconds in missing places: #77751
• Ignore an existing HMR refresh hash cookie with next start: #77714
• Turbopack build: Replace process.env.TURBOPACK usage: #77783
• Client instrumentation: onRouterTransitionStart: #77791
• Turbopack: log telemetry events when TurbopackInternalErrors occur: #77660
• Rename alternate bundler package name: #77793
• Turbopack: fix sideEffects matching for non-relative globs: #77693
• Revert "Upgrade @playwright/test and cleanup internal APIs": #77814
• [next-ts-plugin] fix: language service crashes / metadata plugin not working: #77213
• [dev-overlay] always display bundler name on version info: #77739
• [dev-overlay] sync horizontal scrollbar style: #77769
• [dev-overlay] Read issueCount from non-async errors array: #77821
• [dev-overlay] Fix error dialog resizing logic: #77830
• Turbopack Build: Optimize instrumentation hook generation: #77832
• [next-server] skip setting vary header for basic routes: #77797
• Lazily call refreshTags and getExpiration: #77779
• Add debug logging to default cache handler and "use cache" wrapper: #77827
• [ts-next-plugin] fix: properly exit when failed to initialize: #77842
• Alternate bundler: correctly inject react refresh loader: #77713
• [dynamicIO] Fix dev warmup: #77829
• fix: don't reset the prefetch segment data routes on loop: #77845
• Ensure searchParams access in "use cache" triggers error when caught: #77838
• Revert "[dev-overlay] Fix error dialog resizing logic": #77849
• fix: add cache tags to segment prefetch responses: #77846
• Avoid microtaskiness when lazily fetching from cache handlers: #77843
• [Experiment] : #77866
• [dev-overlay] disable font ligatures: #77865
• Enable process.env.TURBOPACK when process.env.IS_TURBOPACK_TEST is set: #77894
• [ts-next-plugin] fix: use getSourceFile instead of fileExists to check file existence: #77863
• fix: only set request phase to "action" when actually running an action: #76993
• Alternate bundler: fix react refresh and adjust sourcemap: #77875
• Upgrade React from 040f8286-20250402 to 33661467-20250407: #77899
• refactor: rename isAction to isPossibleServerAction: #77011
• [logging] improve logging of port retry: #77868
• Remove canary-gate and add experimental warning for alternate bundler: #77806
• fix(next/image): bump [email protected]: #77839
• Turbopack builds: Remove canary-gate and add experimental warning: #77808
• feat: Disable char frequency analysis for mangler: #77887
• Set Turbopack env var for internal modules: #77902
• Don't externalize various new next/* entrypoints: #77844
• Revert "Fix: RESTORE_ACTION should not be thenable": #77909
• Fix resolve alternate bundler in monorepo: #77913
• Output server.mjs for standalone with type: module: #77944

Example Changes

• with-polyfills example: only link to specific browsers: #77211
• Add example for alternate bundler: #77057
• chore(examples): remove examples that can be v0'd: #77349
• Alternate bundler example: use canary version: #77754
• Fix Wasm example: #77924

Misc Changes

• [test] consolidate hmr test for react 18.3: #76975
• docs: update API example: #76987
• docs: add Pinterest Rich Pins metadata example: #77025
• fix(CI): Correctly call test/update-bundler-manifest.js script: #77000
• Update bundler development test manifest: #77040
• Update bundler production test manifest: #77043
• Update Turbopack development test manifest: #77041
• chore(github): remove /examples from contribution guidelines, remove examples issue template: #77050
• Turbopack: when reading a non yet existing cell from a in progress tasks, wait for the computation to finish: #77029
• Turbopack: wait before reading cells when the task is scheduled: #77031
• Turbopack: don't call individual() again: #77048
• Turbopack: create module graph strongly consistent: #77051
• Turbopack: Vc stability of ModuleGraph: #77052
• Turbopack: fix corrected time calcuation for trace server: #77080
• Turbopack: fewer manifests for static metadata: #77087
• Update Turbopack development test manifest: #77071
• Update bundler production test manifest: #77069
• Update bundler development test manifest: #77068
• Revert "Update rust toolchain to 2025-03-12": #77103
• perf(turbopack): Merge nodes with same starting point: #76938
• refactor(actions): Remove turbopack magic comments: #77063
• Update Turbopack development test manifest: #77108
• Turbopack: move must_use to actually have an effect: #77111
• Turbopack: align chunking with graph entries: #76441
• Turbopack: ChunkGroup in evaluated_chunk_group: #76593
• Turbopack: charset=utf-8 in data-url source maps: #77112
• Update bundler production test manifest: #77107
• Update bundler development test manifest: #77106
• Update Turbopack production test manifest: #77109
• docs(scripts): update Script -> beforeInteractive docs: #77136
• Add doc for instrumentation client hook: #77134
• docs(scripts): missing 'soon': #77137
• doc: diff between instrumentation vs instrumentation-client: #77143
• Alternate bundler: add index.d.ts types to plugin: #77144
• Alternate bundler: Add react-refresh as a dependency of plugin: #77142
• build: Update swc_core to v16.6.0: #77155
• Allow building node-pty in tests: #77187
• Don't mark ppr-errors Turbopack dev tests as failed: #76951
• Bump lightningcss: #77132
• Update Turbopack production test manifest: #77183
• Turbopack: fix graph layout segment optimization: #77094
• Turbopack: split up server actions modules for better treeshaking: #76877
• Turbopack: conditional parse in apply_module_type: #77191
• build: Update swc_core to v16.6.2: #77194
• Turbopack: more tracing: #75351
• Update bundler development test manifest: #77180
• Better failure tracking for middleware-custom-matchers-i18n: #76974
• Update bundler production test manifest: #77179
• fix(test/e2e/prerender): Remove race condition in test: #77222
• Update Turbopack production test manifest: #77228
• Update Turbopack development test manifest: #77227
• [Turbopack] basic production chunking for CSS: #75049
• docs: optimizing local dev: #77140
• Update bundler production test manifest: #77225
• devlow-bench: wait for complete ready for server startup event: #77217
• fix(CI): Re-enable retries for bundler integration tests: #77265
• Turbopack: handle non chunkable modules in module batches: #77282
• Update Turbopack development test manifest: #77276
• Update Turbopack production test manifest: #77275
• Turbopack: avoid single css chunks when there is only a single chunk item: #77283
• Update bundler development test manifest: #77272
• Update bundler production test manifest: #77273
• Turbopack: compute ordered entries in module batches: #77294
• Update Turbopack production test manifest: #77316
• Update Turbopack development test manifest: #77317
• Update bundler production test manifest: #77314
• fix(turbopack): Call .minify() of lightningcss StyleSheet: #77313
• fix(CI build_and_deploy): Use a larger fetch-depth for build-native job: #77307
• chore(turbopack): Fix a few syntactic nits: #77310
• Update bundler development test manifest: #77315
• Turbopack: refactor CssEmbed to avoid creating a chunk item: #77303
• fix: Update swc_core and use rayon instead of chili: #77338
• Fix chakra link: #77280
• Update Turbopack production test manifest: #77366
• Update Turbopack development test manifest: #77365
• Turbopack: ignore static asset imports for Edge: #77382
• Update bundler development test manifest: #77364
• docs: clarify middleware use cases: #77438
• fix(turbopack-bench): Limit copy_dir concurrency to avoid running out of file descriptors: #77468
• docs: fix typo: #77483
• Update swc_core to v16.10.0: #77489
• fix(turbopack): Use strongly consistent reads for sourcemaps in napi FFI boundary: #77511
• Update mappings in launch.json to improve debugging in VSCode: #76559
• chore(ci): Configure codspeed: #76884
• Update bundler production test manifest: #77602
• Update bundler development test manifest: #77603
• Update Turbopack development test manifest: #77605
• Update Turbopack production test manifest: #77604
• Turbopack build: Fix symbolic-file-links test: #77615
• Update pnpm swc-build-native's file path: #77623
• fix: Use standard PostCSS configuration in create-next-app format for ecosystem compatibility: #77376
• Turbopack build: Fix basepath test: #77630
• Turbopack: disable pages dir css test cases: #77380
• Update bundler development test manifest: #77627
• Update Turbopack development test manifest: #77628
• Update bundler production test manifest: #77626
• refactor(turbo-tasks): Make TraceRawVcs a supertrait of TaskInput: #77397
• refactor(turbo-tasks): Make TraceRawVcs a supertrait of MagicAny: #77596
• fix(turbopack): Recognize urls starting with // as external: #77526
• Update CI build caching docs to include bun and other package manager: #77633
• fix(turbopack): Fix panic while tree shaking optimization: #77492
• fix(turbopack): Prevent duplicate in tree shaking: #77491
• Turbopack: Skip ssr processing when next/dynamic ssr: false: #77636
• Turbopack Build: CSR bailout test skip check for file path: #77639
• Turbopack: fix side effects optimization bug: #77640
• Turbopack: add tracing for fetch calls: #77673
• [test] Update stale snapshots: #77680
• Turbopack: fix bug in handling of module batches: #77638
• pack-next: use default --js-build as option instead of --no-js-build: #77686
• Turbopack: Allow overriding tsconfig path via next-config: #77563
• Scripts: migrate unpack-next to TypeScript: #77538
• chore(turbopack): Make TaskInputs use ResolvedVc: #77700
• Getting Started Docs: Add Metadata and OG images page: #74077
• Getting Started Docs: Add Upgrade page: #77717
• Docs IA 2.0: Rename Examples to Guides: #77722
• build: Update swc_core to v19.0.0: #77669
• Add Josh to Turbopack team for created-by label: #77738
• Turbopack: use better ident for worker chunk group: #77731
• chore(turbo-tasks): Remove redundant ast-grep lint rule: #77701
• fix(docs): update error type in notFound function description: #77503
• Update bundler development test manifest: #77706
• Update Turbopack production test manifest: #77709
• Turbopack: refactor resolve_url_reference to avoid chunk_path: #77732
• Update Turbopack development test manifest: #77708
• Port "app-document" test to e2e: #77748
• [ci]: skip build-windows job for docs only change: #77743
• Update bundler production test manifest: #77707
• chore(turbo-tasks): Audit all remaining uses of Vc in a struct: #77756
• docs: instrumentation-client follow up: #77752
• [test] Get rid of unrelated "Invalid hook call" error from tests using styled-components: #77736
• Turbopack: keep side-effect-full imports: #76545
• Docs: Recommend inline use server and update examples: #77770
• Revert "Docs: Recommend inline use server and update examples": #77771
• doc: useLinkStatus: #77648
• Update Turbopack production test manifest: #77767
• Update bundler development test manifest: #77765
• [docs] fix lint issue in use link status doc: #77785
• doc: onNavigate: #77647
• Update bundler production test manifest: #77764
• doc: useLinkStatus doc follow-up: #77790
• Update Turbopack development test manifest: #77766
• [ci] remove needs build-native for lint job: #77787
• test(examples): update turbopack manifest: #75092
• [test] fix bad test fixuture for perf test: #77804
• [test] fix react 19.1 related tests: #77809
• doc: onNavigate follow-up: #77805
• fix(turbopack): Apply hygiene if mangling is disabled: #77815
• Turbopack: omit empty source map when code starts with a new line: #77734
• [next-lint] test: remove eslint config snapshot testing: #77818
• Turbopack: avoid deriving css source map path from generated code path: #77735
• Turbopack: pass asset to chunk_path to allow to use content hash later: #77772
• Docs IA 2.0: Add Deep Dive section placeholder: #77724
• Turbopack: use document.currentScript instead of chunk path literal: #77773
• Turbopack: don't include client-fs assets in NFT: #77799
• Turbopack: enable content hashing in production: #77775
• Turbopack: correctly track await import("path") in static analysis: #77811
• fix(turbopack-cli): Make turbopack_cli::dev::source a persistent (non-transient) task: #77798
• [test] temporarily disable flaky test for react 18: #77848
• Update Turbopack production test manifest: #77872
• Rename process.env.TURBOPACK to process.env.IS_TURBOPACK_TEST for tests: #77892
• [test] consolidate missing tag dev test: #77896
• fix(Turbopack): Intermittent CapacityExceeded Error in Persistent Caching: #77691
• fix: flaky test detection needs to use new turbopack flag: #77908
• fix: apply Geist fonts correctly on default cna template: #77237
• Update bundler development test manifest: #77884
• Update bundler production test manifest: #77885
• Update Turbopack development test manifest: #77886
• Update bundler production test manifest: #77914
• Update bundler development test manifest: #77915
• fix(turbopack): Apply import_map option of swc_emotion correctly: #71776
• Turbopack: handle removed routes: #77890
• build: Update swc_core to v21.0.1: #77918
• IA 2.0: Review Getting Started Section: #77921
• test: attempt to de-flake rsc-basic: #77934
• docs: revert image 15.3 change until live: #77941
• Turbopack: remove CSS comments when minifying: #77940

Credits

Huge thanks to @raunofreiberg, @huozhi, @ijjk, @timneutkens, @gaojude, @leerob, @mezotv, @bgw, @samcx, @ztanner, @sokra, @mischnic, @wbinnssmith, @kdy1, @unstubbable, @ahabhgk, @ScriptedAlchemy, @SukkaW, @wyattjoh, @eps1lon, @Amirroid, @Netail, @lubieowoce, @gnoff, @jackwilson323, @acdlite, @sbougerel, @kevva, @kasperpeulen, @Cy-Tek, @dvoytenko, @husseinraoouf, @isBatak, @iamkd, @delbaoliveira, @jantimon, @padmaia, @Bernardoow, @styfle, @devjiwonchoi, @JamBalaya56562, and @Marukome0743 for helping!