Metro Files

• [Security]: Fix CVE on micromatch/braces by removing the dependency (https://github.com/react/metro/pull/2000 by @robhogan)
• [Feature]: Add a built-in metro:runtime/* specifier, resolvable from any importer (https://github.com/react/metro/pull/2083 by @robhogan)
• [Feature]: Pass Metro's own @babel/runtime and its version to Babel presets when transformer.enableBabelRuntime is true (https://github.com/react/metro/pull/1957 by @robhogan)
• [Fix]: Resolver: Fix stale resolutions after adding a nearer package.json or retargeting a symlinked directory (https://github.com/react/metro/pull/1948 by @robhogan)
• [Fix]: Resolver: Resolve packages and directories named with an asset extension (eg lodash.zip) as modules (https://github.com/react/metro/pull/2055 by @robhogan)
• [Fix]: Resolver: Fall through to parent conditions when a nested "exports" or "imports" condition has no match (https://github.com/react/metro/pull/2074 by @maximilliangrand)
• [Fix]: Resolver: Don't resolve an exact "exports" or "imports" subpath with a null target through a pattern (https://github.com/react/metro/pull/1987 by @kwy404)
• [Fix]: Resolve Metro's own runtime and @babel/runtime even when they're outside projectRoot and watchFolders (https://github.com/react/metro/pull/2065, https://github.com/react/metro/pull/2083 by @robhogan)
• [Fix]: Ambiguous module resolution errors list the conflicting files instead of an empty list, in the terminal and in the app (https://github.com/react/metro/pull/2102 by @kwy404)
• [Fix]: Use [metro-watchFolders]/N/ URLs for assets outside projectRoot, which also moves them in release builds (https://github.com/react/metro/pull/1892 by @robhogan)
• [Fix]: Fix [metro-project] and [metro-watchFolders] bundle serving on Windows (https://github.com/react/metro/pull/2015 by @motiz88)
• [Fix]: Fix an HMR crash on [metro-project] and [metro-watchFolders] URLs (https://github.com/react/metro/pull/2017 by @motiz88)
• [Fix]: Don't resolve [metro-project] and [metro-watchFolders] prefixes in API and CLI entry points (https://github.com/react/metro/pull/2030 by @motiz88)
• [Fix]: Fix backslashes in async bundle paths on Windows (https://github.com/react/metro/pull/1938 by @robhogan)
• [Fix]: Fix stale modules when files change during an in-flight or failed build (https://github.com/react/metro/pull/2007 by @YevheniiKotyrlo)
• [Fix]: Fix files changed during startup being missed until restart (https://github.com/react/metro/pull/2054 by @cpruijsen)
• [Fix]: Fix changes made immediately after startup sometimes being missed on macOS (https://github.com/react/metro/pull/2003 by @robhogan)
• [Fix]: Fix watch mode losing files when a directory replaces a file or symlink, eg unlinking a package (https://github.com/react/metro/pull/2009 by @robhogan)
• [Fix]: FallbackWatcher: Fix a hang on stop, and missed changes after a watch error or on Windows (https://github.com/react/metro/pull/1967 by @robhogan)
• [Fix]: FallbackWatcher: Close watch handles under a deleted directory (https://github.com/react/metro/pull/2004 by @YevheniiKotyrlo)
• [Fix]: metro-file-map: Don't change the active mock when a duplicate is removed (https://github.com/react/metro/pull/1756 by @durvesh1992)
• [Fix]: Create fileMapCacheDirectory if it doesn't exist, rather than failing to persist the file map cache (https://github.com/react/metro/pull/2096 by @shubh73)
• [Fix]: Include Metro's dependency collection modules in the transform cache key (https://github.com/react/metro/pull/1749 by @fallintoplace)
• [Fix]: Inline requires: Don't partially inline requires referenced in type annotations or export {...} specifiers (https://github.com/react/metro/pull/2092 by @robhogan)
• [Fix]: Propagate transformer initialisation errors from Bundler (https://github.com/react/metro/pull/1854 by @Boulea7)
• [Fix]: Release workers and watchers when Metro fails to initialise (https://github.com/react/metro/pull/1963 by @robhogan)
• [Fix]: Ignore attributes like stroke-width when reading SVG dimensions (https://github.com/react/metro/pull/1972 by @GabrielDumbrava)
• [Fix]: Fix generated positions in indexed source maps (https://github.com/react/metro/pull/1976 by @kwy404)
• [Fix]: Fix source maps losing lines after very large unmapped gaps (https://github.com/react/metro/pull/1983 by @robhogan)
• [Fix]: metro-symbolicate: Don't fail on frames with no source position, eg [native code] (https://github.com/react/metro/pull/1891 by @robhogan)
• [Fix]: metro-symbolicate: Parse frames with Windows absolute paths (https://github.com/react/metro/pull/1939 by @robhogan)
• [Performance]: Inline destructured CommonJS requires (const {foo} = require('foo')) under inlineRequires (https://github.com/react/metro/pull/2087 by @robhogan)
• [Performance]: ~3x faster composeSourceMaps, with ~15% less memory (https://github.com/react/metro/pull/1978, https://github.com/react/metro/pull/1979, https://github.com/react/metro/pull/1980, https://github.com/react/metro/pull/1983 by @robhogan)
• [Performance]: ~35% faster first-pass resolution (https://github.com/react/metro/pull/1945, https://github.com/react/metro/pull/1946, https://github.com/react/metro/pull/1948 by @robhogan)
• [Performance]: ~33% faster non-Watchman crawl on startup (https://github.com/react/metro/pull/1677 by @kitten)
• [Deprecated]: String values of transformer.enableBabelRuntime - use true (https://github.com/react/metro/pull/1957 by @robhogan)
• [Types]: Add TypeScript definitions for metro-runtime (https://github.com/react/metro/pull/1996 by @robhogan)
• [Types]: Declarations use IteratorObject, which needs TypeScript 5.6+ unless skipLibCheck is set (https://github.com/react/metro/commit/df2e7581bcf4)

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

• [Experimental]: Add server.unstable_middleware and server.unstable_priorityMiddleware, to add middleware after or before Metro's own (https://github.com/react/metro/pull/2031 by @vzaidman)
• [Experimental]: Add server.unstable_onServerCreated, called with Metro's server before it listens (https://github.com/react/metro/pull/2031 by @vzaidman)
• [Experimental]: runServer's unstable_extraMiddleware is deprecated - use unstable_priorityMiddleware (https://github.com/react/metro/pull/2031 by @vzaidman)
• [Experimental]: Fix mismatched asset paths in builds under unstable_serverRoot (https://github.com/react/metro/pull/1917 by @robhogan)
• [Experimental]: metro-file-map: Changes to the plugin and FileSystem APIs (https://github.com/react/metro/pull/1944, https://github.com/react/metro/pull/1951, https://github.com/react/metro/pull/2071 by @robhogan), and crawlerFactory crawlers must report symlink targets as 1 or a pre-resolved path (https://github.com/react/metro/pull/1687 by @kitten)

Full Changelog: https://github.com/react/metro/compare/v0.87.1...v0.87.2