v12.1.5

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!