metro

• [Feature]: Add server.forwardClientLogs config option, to allow suppressing client console logs in Metro output. (https://github.com/facebook/metro/pull/1192 by @huntie)
• [Fix]: constant-folding-plugin: Don't fold optional function calls (foo.?()). (https://github.com/facebook/metro/pull/1178 by @Gamote)
• [Fix]: inline-plugin: Don't replace __DEV__ in invalid Babel AST locations. (https://github.com/facebook/metro/pull/1195 by @kitten)
• [Fix]: Move metro-minify-terser dependency to fix resolution under isolated node_modules (pnpm, etc). (https://github.com/facebook/metro/pull/1199 by @robhogan)

NOTE: Experimental features are not covered by semver and can change at any time.

• [Experimental]: Fix module duplication due to non-real resolved paths when combining unstable_enablePackageExports and unstable_enableSymlinks. (https://github.com/facebook/metro/pull/1198 by @robhogan)

Full Changelog: https://github.com/facebook/metro/compare/v0.80.4...v0.80.5

• [Fix]: Remove special handling of paths containing .zip/ (https://github.com/facebook/metro/commit/9212156011ebdb680f12ad7fa6597a0935b8b84a by @robhogan)
• [Fix]: Edge case leading to invalid bundles when only the order of dependencies within a module has changed (https://github.com/facebook/metro/commit/28abfc9c4c9cebbe499b5b8f47fa1b9f6af54179 by @motiz88)

Full Changelog: https://github.com/facebook/metro/compare/v0.80.3...v0.80.4

• [Feature]: Pass dev option to resolver (https://github.com/facebook/metro/pull/1134 by @EvanBacon)
• [Fix]: Fast Refresh may fail or lose modifications after correcting transform or resolution issues in user code (https://github.com/facebook/metro/commit/0e51ad92f3f2fba3f90410d246009e5ade48db7c by @robhogan)
• [Fix]: Don't unnecessarily reset Fast Refresh after recovering from certain transform or resolution errors (https://github.com/facebook/metro/commit/46b02dc021d257490ba25d6e102326f451e714b8 by @robhogan)
• [Fix]: Ignore errors in unreachable modules during incremental builds (https://github.com/facebook/metro/pull/1164 by @robhogan)

• [Fix]: Fast Refresh breaks on encountering a garbage cycle with async/weak dependencies (https://github.com/facebook/metro/commit/e223a2e05c6a9a4267c4bdf05c03a721835cbdc9 by @robhogan)
• [Fix]: Destroy HTTP cache connections on timeout instead of hanging (https://github.com/facebook/metro/commit/6001f86f0a14a85e94522b01f38aff27714ee3c8 by @motiz88)
• [Fix] Respond with HTTP 404 when a bundle entry point cannot be resolved (https://github.com/facebook/metro/commit/cbfb96d9661b49e52f64d6f83df6ac96c03b9052 by @motiz88)
• [Fix]: Support serverRoot with HMR serializer chunks (https://github.com/facebook/metro/pull/1137 by @EvanBacon)
• [Fix]: Update hermes-parser and related packages to 0.18.0 (https://github.com/facebook/metro/commit/9cbf1b71aa4e002807bbbf231a3e6e184fc4f8ef)

NOTE: Experimental features are not covered by semver and can change at any time.

• [Experimental]: When enabled, the "exports" field is now considered for Haste packages (which could include local monorepo packages) (https://github.com/facebook/metro/pull/1136 by @kraenhansen)

• [Fix]: Add React JSX runtime to default exceptions for inline requires.(https://github.com/facebook/metro/pull/1126 by @gaearon)
• [Fix]: Always exempt Babel runtime helpers from inline (lazy) requires. (https://github.com/facebook/metro/pull/1127 by @gaearon)
• [Fix]: Include protocol scheme in sourceMapURL when building bundles for windows / macos. (https://github.com/facebook/metro/pull/763 by @acoates-ms)

NOTE: Experimental features are not covered by semver and can change at any time.

• [Experimental]: Add unstable_workerThreads options to transformer and watcher configuration. (https://github.com/facebook/metro/commit/20df4ecd6456f994511290375d1fa6f13b902267 by @robhogan)

• [Breaking]: Remove metro-runtime/src/modules/fast-refresh and react-refresh dependency - now owned by RN's Babel preset. (https://github.com/facebook/metro/commit/855796816a941ca14e025df3f5a80fcd63bfbc21 by @robhogan)
• [Breaking]: metro-babel-register: Switch to Hermes parser, only apply Flow transforms to .js. (https://github.com/facebook/metro/commit/ca0f89c26d27604e0dfdab857823a99378db7b48 by @pieterv)
• [Feature]: metro-babel-register: Support export-namespace-from and Flow enums. (https://github.com/facebook/metro/commit/ca0f89c26d27604e0dfdab857823a99378db7b48 by @pieterv)
• [Fix]: Removing an async/lazy import may incorrectly free its target. (https://github.com/facebook/metro/commit/5f446f3e98e0ead8b62345fe13afccc53826c8b7 by @robhogan)

NB: metro-react-native-interop-tools has been removed and will receive no further updates. (https://github.com/facebook/metro/commit/c084066d35492dd39227e03442d6c3a4e0299dd9 by @GijsWeterings)

Full Changelog: https://github.com/facebook/metro/compare/v0.79.1...v0.80.0

• [Fix]: metro-babel-register: prevent arbitrary transformation of Babel plugins during registration. (https://github.com/facebook/metro/commit/e8f468d5e4f1b88f1b99c66656cec004d4079831 by @robhogan)
• [Fix]: Fix "unexpected null" crash when handling a batch of file changes. (https://github.com/facebook/metro/pull/1083 by @robhogan)
• [Fix]: Symlinks with indirections may not be resolvable. (https://github.com/facebook/metro/pull/1084 by @robhogan)

Full Changelog: https://github.com/facebook/metro/compare/v0.79.0...v0.79.1

• [Breaking]: Disable global package resolution (resolver.enableGlobalPackages) by default (https://github.com/facebook/metro/commit/0df1541e9890bc758ba0c328bfece180e9bc515b by @robhogan)
• [Feature]: Add option to configure Metro's support for global package resolution (aka "Haste packages") (https://github.com/facebook/metro/commit/8b80efb956a3e40ae14d89ce81f5745724d9f160 by @motiz88)
• [Feature]: Enable resolution through symlinks (previously experimental unstable_enableSymlinks) (https://github.com/facebook/metro/commit/9e7cec1b80ba4e843f3260437be04c3896299916 by @robhogan)
• [Feature]: Passing custom customTransformOptions and customResolverOptions to bundle_build_started log event so as to refine the bundling message (https://github.com/facebook/metro/pull/1061 by @EvanBacon)

• [Feature]: Return promise from metro-cache's Cache.set to allow handling underlying async store errors (https://github.com/facebook/metro/commit/284516057349dff91d7e97b1f6b004068d428bfa by @robhogan)
• [Feature] Add base URL string overload to InspectorProxy.createWebSocketListeners (https://github.com/facebook/metro/commit/8522db1c4221d4b582acc0e89c4278fa75885642 by @huntie)

[!NOTE]
v0.78.1 will be the final release of metro-inspector-proxy, which is being relocated into the React Native repo. In Metro v0.78.0, we removed builtin Inspector Proxy creation as a breaking change.

• For React Native integrators: The @react-native/dev-middleware package will provide a batteries-included integration point replacing metro-inspector-proxy. We're working closely with Expo on the API for this which should be ready within the next two weeks — usage will be documented in the package README.
• Please reach out to @huntie (https://twitter.com/alxhnt) if you need support around this change.

• [Breaking] Update default server port to 8081. (https://github.com/facebook/metro/commit/891fe9674cb6bc63aea4cea365f78fa2584ab138 by @huntie)
• [Breaking] Remove metro-react-native-babel-transformer and metro-react-native-babel-preset, which will be published as @react-native/metro-babel-transformer and @react-native/babel-preset going forward. (https://github.com/facebook/metro/commit/799aa0a546e39546e2d0463f3fb1a963dc102bdf by @dmytrorykun)
• [Breaking] Remove runInspectorProxy option from server. (https://github.com/facebook/metro/commit/2b0b15d733c47768304569c800b3aceca3ef5b1f by @huntie)
  • This is a significant breaking change — Metro will no longer start a built-in Inspector Proxy.
  • To migrate today, integrators should create an InspectorProxy instance externally, and provide the relevant handlers to Metro.runServer(). For reference:
    • inspectorProxy.processRequest to ServerOptions.unstable_extraMiddleware.
    • inspectorProxy.createWebSocketListeners to ServerOptions.websocketEndpoints.
  • Recommended: In the very near future, we will be encapsulating this functionality in the @react-native/dev-middleware package, which will provide a batteries-included integration point for the above.
  • Please reach out to @huntie if you need support with this feature.
• [Breaking]: DependencyGraph.resolveDependency now takes a dependency object instead of a string. (https://github.com/facebook/metro/commit/fbdd295c5820152487f3331852ce91824808ce81 by @motiz88)
• [Breaking]: Stop passing inlineRequires and nonInlinedRequires to Babel transformers. (https://github.com/facebook/metro/commit/e339c8fae4c2e925aedbd3755e18a4a780bd0fb7 by @motiz88)
• [Feature] Widen config search paths to include metro.config.cjs. (https://github.com/facebook/metro/commit/692293339e3b9f542f7b83c04bdccf46fef05766 by @huntie)
• [Feature]: Custom resolvers may access the original dependency descriptor for diagnostic purposes. (https://github.com/facebook/metro/commit/fbdd295c5820152487f3331852ce91824808ce81 by @motiz88)
• [Fix]: asserted-states is not iterable when using older Watchman versions. (https://github.com/facebook/metro/commit/3ef5fc83b911bac8e972c9dd8d2f63212eb6952c by @robhogan)
• [Fix]: Avoid resolving .native as a standalone file extension. (https://github.com/facebook/metro/pull/1045 by @EvanBacon)
• [Fix]: Resolution errors now show accurate source locations. (https://github.com/facebook/metro/commit/a398f34a34a9b385af6c2bd64ea3ad161913b067 by @motiz88)
• [Performance]: Parallelise Haste construction to improve startup on large Haste systems. (https://github.com/facebook/metro/commit/2e0f69ac88be904e8d49080aa25f5d559db1a0b9 by @robhogan)

• [Breaking]: Increase minimum Node version from 16 to 18. (https://github.com/facebook/metro/commit/ebaf27ab49eb8b9394107bd7a796b24bc342c483 by @arushikesarwani94)
• [Breaking]: Use Terser's default for comments. (https://github.com/facebook/metro/pull/972 by @tido64)
• [Breaking]: Remove metro-minify-uglify from metro dependencies. (https://github.com/facebook/metro/commit/7a8fcd5ecf5ccbe760c22be7fa924f9cb7c2fe1e by @robhogan)
• [Fix]: Fixed a bug in the handling of path separators in blockList on Windows. (https://github.com/facebook/metro/commit/2eecfc767095f32bbea35a62c2dc85dcc9c4f839 by @motiz88)
• [Fix]: Protect against unsafe merging of blockList patterns with inconsistent regex flags. (https://github.com/facebook/metro/commit/c80904b64b8fa5d152da176ce668b77fa3e0ba25 by @motiz88)
• [Fix]: Incorrect worker resolution when multiple metro versions are installed. (https://github.com/facebook/metro/commit/6d46078e74ae9a43aa90bed46dbd6610e2696cd0 by @robhogan)
• [Performance]: Improve resolution performance for files outside the project root. (https://github.com/facebook/metro/commit/dc3cddf21803eb3addb084627e4d536318e3da0a by @robhogan)
• [Performance]: Improved startup speed via a new file map cache format. (https://github.com/facebook/metro/commit/166477e9154b3aec4d3081a759cc40f8e3d53c4a by @robhogan)

NOTE: Experimental features are not covered by semver and can change at any time.

• [Experimental]: metro-file-map: Normalize root-relative paths for cross-platform cache compatibility. (https://github.com/facebook/metro/commit/d282a0818b840f1d5b0a2086051ec2c7febf1986 by @motiz88)
• [Experimental]: Fix crash when require.context is used on a directory with infinite path expansions. (https://github.com/facebook/metro/commit/14d652f411fd055c950f820d2de3087e2a791acd by @robhogan)

Full Changelog: https://github.com/facebook/metro/compare/v0.76.7...v0.77.0

• [Feature]: metro-babel-transformer and metro-react-native-babel-transformer will return metadata from Babel transform results. (42fdbc2b20c29ca4cfad404a4c222c65077c6f5e by @robhogan)
• [Feature]: Expose TerminalReporter for Reporter implementations. (417e6f276ff9422af6039fc4d1bce41fcf7d9f46 by @colinta)
• [Feature]: Allow client-side device identifiers in inspector proxy. (c6a94bc170cf95a6bb21b5638929ec3311a9a5b7 by @byCedric)
• [Fix]: EPERM file watching errors on Windows. (4b22efbe85fed9d0520dd5d57bd1a394b2cc66f6 by @robhogan)

Full Changelog: https://github.com/facebook/metro/compare/v0.76.6...v0.76.7

• [Types] Update config and Server types to use broader types from connect package (https://github.com/facebook/metro/commit/d20d7c80217ba2319379472fec0e345f58c569c6 by @huntie)
• [Types] Fix TypeScript name for createConnectMiddleware export (https://github.com/facebook/metro/commit/06682f8775bb4447583fa1944126b3701da540bc by @huntie)
• [Deprecation] Deprecate server.enhanceMiddleware option (https://github.com/facebook/metro/commit/22e85fde85ec454792a1b70eba4253747a2587a9 by @huntie)

NOTE: Experimental features are not covered by semver and can change at any time.

• [Experimental] Add unstable_extraMiddleware option to runServer API (https://github.com/facebook/metro/commit/d0d554381f119bb80ab09dbd6a1d310b54737e52 by @huntie)

Full Changelog: https://github.com/facebook/metro/compare/v0.76.5...v0.76.6

This is a hotfix on the 0.73.x branch.

• [Feature] Support URLs for both bundling and symbolication requests using //& instead of ? as a query string delimiter (https://github.com/facebook/metro/pull/994 by @robhogan)
• [Fix] Emit source URLs in a format that will not be stripped by JavaScriptCore (https://github.com/facebook/metro/pull/994 by @robhogan)

Full Changelog: https://github.com/facebook/metro/compare/v0.73.9...v0.73.10

This is a hotfix on the 0.72.x branch.

• [Feature] Support URLs for both bundling and symbolication requests using //& instead of ? as a query string delimiter (https://github.com/facebook/metro/pull/993 by @robhogan)
• [Fix] Emit source URLs in a format that will not be stripped by JavaScriptCore (https://github.com/facebook/metro/pull/993 by @robhogan)

Full Changelog: https://github.com/facebook/metro/compare/v0.72.3...v0.72.4

This is a hotfix on the 0.70.x branch.

• [Feature] Support URLs for both bundling and symbolication requests using //& instead of ? as a query string delimiter. (https://github.com/facebook/metro/pull/996 by @robhogan)
• [Fix] Emit source URLs in a format that will not be stripped by JavaScriptCore. (https://github.com/facebook/metro/pull/996 by @robhogan)

Full Changelog: https://github.com/facebook/metro/compare/v0.70.3...v0.70.4

• [Feature] Support URLs for both bundling and symbolication requests using //& instead of ? as a query string delimiter (https://github.com/facebook/metro/commit/bd357c8206205f70051a7a85a645a9595c650002 by @robhogan)
• [Fix] Fix crash on a module added+modified+removed between updates (https://github.com/facebook/metro/commit/5d7305e2f3a9f5f4aebc889a452afb03b1db12a7 by @robhogan)
• [Fix] Fix missed modification on module removed+modified+added between updates (https://github.com/facebook/metro/commit/5d7305e2f3a9f5f4aebc889a452afb03b1db12a7 by @robhogan)
• [Fix] Emit source URLs in a format that will not be stripped by JavaScriptCore (https://github.com/facebook/metro/commit/bce6b27ef8ac7c41e0a3e990eb71747cc0e6f606 by @robhogan)
• [Performance] Prune unmodified modules from delta updates before sending them to the client (https://github.com/facebook/metro/commit/e24c6aefc87842c560c613dcefa8c4ffdc3b91b6 by @robhogan)

NOTE: Experimental features are not covered by semver and can change at any time.

• [Experimental] Fix babel/runtime issue when using Package Exports (https://github.com/facebook/metro/commit/905d773454cdff9d7a25403f549b40ba54558792 by @huntie)

Full Changelog: https://github.com/facebook/metro/compare/v0.76.4...v0.76.5

• [Feature]: Support the x_google_ignoreList source map extension. (https://github.com/facebook/metro/pull/973, 82bd64a9720174a9e2a02fb73bbef292153e20f1 by @motiz88)
• [Feature]: Support bundling KTX files as image assets. (https://github.com/facebook/metro/pull/975 by @rshest)
• [Fix]: Fix crash on a module added+modified+removed between updates. (5d7305e2f3a9f5f4aebc889a452afb03b1db12a7 by @robhogan)
• [Fix]: Fix missed modification on module removed+modified+added between updates. (5d7305e2f3a9f5f4aebc889a452afb03b1db12a7 by @robhogan)

Full Changelog: https://github.com/facebook/metro/compare/v0.76.3...v0.76.4

• [Feature]: Support custom __loadBundleAsync implementations in the default asyncRequire function. See the lazy bundling RFC for more details. (https://github.com/facebook/metro/commit/ac3adced45a6ca32286dda9e9470eab6eb4218bf, https://github.com/facebook/metro/commit/f07ce5c455a76b63d47c5ccec9611fc8cd66cd0e by @motiz88)
• [Feature]: Support lazy parameter in bundle requests. See the lazy bundling RFC for more details. (https://github.com/facebook/metro/commit/4ef14f9a2f6c0b566df86f9caebb5a98bb7ba52a by @motiz88)
• [Feature]: Preserve comments in unminified builds, while continuing to strip all comments from minified builds. (https://github.com/facebook/metro/pull/967 by @tido64)
• [Deprecated]: The transformer.asyncRequireModulePath config option is deprecated. Use __loadBundleAsync instead.(https://github.com/facebook/metro/commit/c7b684f0ae90ec22f7cddf82858dcaa8aa4bc64a by @motiz88)

NOTE: Experimental features are not covered by semver and can change at any time.

• [Experimental] Package Exports unstable_conditionNames now defaults to ['require', 'import'] (https://github.com/facebook/metro/commit/e70ceef126a528c5e18d58c5ed47adb864e8a76b by @huntie)
• [Experimental] Removed server.experimentalImportBundleSupport config option. (https://github.com/facebook/metro/commit/4ef14f9a2f6c0b566df86f9caebb5a98bb7ba52a by @motiz88)

Full Changelog: https://github.com/facebook/metro/compare/v0.76.2...v0.76.3

• [Feature]: Added customizeStack hook to Metro's /symbolicate endpoint to allow custom frame skipping logic on a stack level. (https://github.com/facebook/metro/commit/ce266ddafd5eb484168f973f84a203d8b162f842 by @GijsWeterings)
• [Feature]: Re-export metro-core's Terminal from metro. (https://github.com/facebook/metro/commit/86e3f934d4818cf4332a6dc3bed914db46090dd5 by @robhogan)
• [Feature]: Re-export metro-config's resolveConfig from metro. (https://github.com/facebook/metro/commit/cc1666415f8773f799ddda6f4f7f83b8dc6205dd by @robhogan)
• [Types]: Remove dependency on @types/babel__code-frame. (https://github.com/facebook/metro/commit/41cdc034a92c9aed8dd3410bf1d322de8c8e3ebd by @robhogan)
• [Types]: Remove dependency on @types/ws. (https://github.com/facebook/metro/commit/7deb525916e7076a57e48e95a63c20702365246a by @robhogan)
• [Types]: Fix TypeScript types entry point for metro-source-map. (https://github.com/facebook/metro/commit/3238bbc9f462081765014a6046fdec03a391005e by @huntie)
• [Deprecated]: Deprecate ResolutionContext.getPackageForModule. (https://github.com/facebook/metro/commit/2d0a01cd7e244d4dbabc1718aa5c2d43a98b2d48 by @huntie)

NOTE: Experimental features are not covered by semver and can change at any time.

• [Experimental]: Pass full path and query params to asyncRequire for lazy bundles. (https://github.com/facebook/metro/commit/61a30b7fc2075cf53f87ae8ad7b7423d204ef670 by @motiz88)
• [Experimental]: Fix bug where Package Exports warnings may have been logged for nested node_modules path candidates. (https://github.com/facebook/metro/commit/29c77bff31e2475a086bc3f04073f485da8f9ff0 by @huntie)
• [Experimental]: Fix package.json discovery against root package specifiers for Package Exports. (https://github.com/facebook/metro/commit/b99530302415d065a54cf2671bd0cc6c820819ed by @huntie, fixes https://github.com/facebook/metro/issues/965 reported by @shamilovtim)

Full Changelog: https://github.com/facebook/metro/compare/v0.76.1...v0.76.2