[Script] Use __non_webpack_require__ to fetch partytown server-side: #35793
Use ReadableStream in client hydration for Firefox compatibility: #35796
Continue testing react v17 with e2e tests: #35787
Collect packages are used and eliminated in getServerSideProps: #35404
Initial implementation of statically optimized flight data of server component pages: #35619
Fix layout="raw" image element sizes prop: #35809
fix: reset visible state when src/href changed: #35287
Add warning when importing "next" directly: #35884
Custom app for switchable runtime: #35666
Update repo to use react 18 by default: #35888
Fix Firefox flash of white on next/image with placeholder=blur: #35889
Fix data encoder and decoder to use stream in renderer: #35936
Revert "fix the dynamic routing of middleware": #35932
Update: Add error message when for getServerSideProps invalid return value: #35887
Code refactoring: #35937
fix: add locale prefix to middleware preflight url: #35911
Emotion SWC Plugin - Allow for jsxImportSource to be configurable:

Release notes available: 1
Commit history only: 0
History missing: 0

Last checked 2 Oct 2026, 11:00 UTC

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12.1.5

12 Apr 2022GitHub Release

Core Changes

[Script] Use __non_webpack_require__ to fetch partytown server-side: #35793
Use ReadableStream in client hydration for Firefox compatibility: #35796
Continue testing react v17 with e2e tests: #35787
Collect packages are used and eliminated in getServerSideProps: #35404
Initial implementation of statically optimized flight data of server component pages: #35619
Fix layout="raw" image element sizes prop: #35809
fix: reset visible state when src/href changed: #35287
Add warning when importing "next" directly: #35884
Custom app for switchable runtime: #35666
Update repo to use react 18 by default: #35888
Fix Firefox flash of white on next/image with placeholder=blur: #35889
Fix data encoder and decoder to use stream in renderer: #35936
Revert "fix the dynamic routing of middleware": #35932
Update: Add error message when for getServerSideProps invalid return value: #35887
Code refactoring: #35937
fix: add locale prefix to middleware preflight url: #35911
Emotion SWC Plugin - Allow for jsxImportSource to be configurable:

#35963

Update polyfill of web streams: #35571

Add .eslintrc.cjs to list of supported next lint config files: #35440

update webpack: #35867

Ensure minimalMode previousCache expire time is capped: #35954

Add test case for module resolution in node_modules from different contexts: #35978

Support shared component with next built-in client components: #35975

Use eager import to include client modules: #35979

Use renderToString for flush effects: #35999

test: organize react 18 tests: #36003

allow to provide postcss plugin options as a string: #35173

Fix leaking internal config to user-defined loader prop in next/image: #36013

Support export all syntax in client components: #36027

Interpolate default exports: #35933

feat(next-swc): Update swc crates: #35996

Interpolate default exports is now unnecessary: #36065

Do not add locale to link for api route and middleware preflight: #35994

update @vercel/nft to 0.18.1: #36075

Fix outputStandalone with optimizeCss: #36028

Interpolate module.exports as default import : #36082

fix(next-url): print properly using logger symbol: #36097

Documentation Changes

Docs: update react 18's overview: #35766
Update dead link for getStaticPaths in error docs: #35814
Link to with-docker-multi-env example.: #35820
Add Vitest example.: #35858
Docs: Add useful link to invalid-getstaticprops-value error message: #35915
Update Manual Steps in Getting Started guide: #35898
fix: toBeInTheDocument is not a function: #35930
Refactor default locale prefix to support clone(): #35874
docs: clarify when you use getServerSideProps: #35922
Update docs related to React 18: #35952
Mention HTTP 303 See Other in redirects section: #35997
Update the docs for Switchable Runtime: #36015
Add docs for x-nextjs-cache header: #36023
Improvements to the MDX Docs and replaced a leftover reference to babel: #35332
Moving middleware file : #36009
Revert "Improvements to the MDX Docs and replaced a leftover reference to babel": #36066
docs: failed-loading-swc possible fix for Windows users: #36081

Example Changes

fix(with-mongodb): Change comment of MongoDB client in getServerSideProps: #35750
[example] Fix bird animations in with-three-js example: #36053
Update to with-supertokens example: #35991
[Examples] Updating with-elasticsearch to latest Elasticsearch lib version: #36063
[example] Fix fast refresh in with-slate example: #36095
add support for changing /route/#hashes: #36079

Misc Changes

test: add test for basic dynamic import with react 18 hydration: #35772
Send build trace to datadog in CI: #35306
Fix docs only check for performance metrics job: #35785
Run e2e suite against React 18: #35774
ci(trace): adjust agent env variables: #35790
ci(trace): fix workflow conditions: #35800
ci(workflow): fix api key for trace: #35804
Stabilize react streaming ISR test: #35885
Fix flaky test: #35951
Add note to contributing about docs manifest: #36020
Update turbo cache key: #36074
docs: suggest cloning with depth=1 to avoid huge downloads: #36064

Credits

Huge thanks to @TianenPang, @huozhi, @Brooooooklyn, @SokichiFujita, @timneutkens, @housseindjirdeh, @kwonoj, @jonespen, @leerob, @shuding, @atcastle, @SukkaW, @samueldusek, @styfle, @amandeepmittal, @bestony, @nkzawa, @kamerat, @JohnDaly, @jakejarvis, @sokra, @reconbot, @bjorm, @kdy1, @HaNdTriX, @Markos-Th09, @rishabhpoddar, @timeyoutakeit, @aravindputrevu, @molebox, @gsimone, @Ethan-Arrowood, @Kikobeats, @williamli, and @vltansky for helping!

12.1.5#

Core Changes

12.1.5#

Core Changes

Documentation Changes

Example Changes

Misc Changes

Credits

12.1.5

12.1.5