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enhanced-resolve

5.24.0

Minor Changes

  • Allow the context path and request arguments of resolve (and resolveSync/resolvePromise) to accept file: URL instances, converting them to filesystem paths. Plain strings stay literal paths, matching Node's fs. (by @alexander-akait in #607)

Patch Changes

  • Make the resolver runtime-agnostic so it works in browsers, Deno and Bun as well as Node. File contents are decoded without assuming a Node Buffer, and browser shims are provided for the path, url and graceful-fs builtins (Node, Deno and Bun keep using the native ones) so the package bundles for the browser — supply your own fileSystem there. (by @alexander-akait in #606)

  • Rename the positional resolve/resolveSync/resolvePromise parameters to parent/specifier (from path/request) for ESM-aligned naming and document them in the README. Purely cosmetic — arguments are positional, so there is no behavior or API change. (by @alexander-akait in #611)

5.23.0

Minor Changes

  • Allow the path-like resolve options roots, modules, alias/fallback targets, restrictions, and tsconfig (the config file, configFile, baseUrl, and references) to accept file URL instances (such as new URL("./dir/", import.meta.url)), converting them to filesystem paths. Plain strings are still treated as literal paths, matching Node's fs. (by @alexander-akait in #604)

5.22.2

Patch Changes

  • Fall back to the next modules entry when a package exports target is filtered out by restrictions, instead of throwing. (by @alexander-akait in #600)

5.22.1

Patch Changes

  • Fix restrictions bypass via an in-root symlink pointing outside the root. (by @alexander-akait in #595)

5.22.0

Minor Changes

  • CachedInputFileSystem#purge accepts a second { exact?: boolean } argument; exact: true removes only entries whose key matches what exactly instead of any entry whose key starts with what. (by @alexander-akait in #591)

5.21.6

Patch Changes

  • Speed up alias resolution on the hot path. (by @alexander-akait in #589)

    • AliasPlugin / TsconfigPathsPlugin: bucket compiled alias options by the first char code of name, so resolves skip options whose name can't possibly match the request's first char. Gated to cases with 2+ distinct first chars so degenerate single-bucket lists (e.g. long alias chains) don't pay for the Map.get.
    • TsconfigPathsPlugin: memoize _selectPathsDataForContext(map, requestPath) per map so the per-source-file contextList scan only runs once per directory. Gated to maps with 2+ contexts so single-context tsconfigs aren't penalized by the cache lookup.

    Biggest wins on alias-heavy configs (300+ entries): huge-alias-miss +151%, huge-alias-list +126%, alias-first-char-miss +120%.

5.21.5

Patch Changes

5.21.4

Patch Changes

  • When tsconfig: true is used, walk up parent directories to find tsconfig.json, matching TypeScript's own findConfigFile behavior. (by @xiaoxiaojx in #585)

5.21.3

Patch Changes

  • TsconfigPathsPlugin now falls through to normal module resolution when a paths pattern matches but the mapped path does not exist, matching TypeScript's native resolution behavior. Previously, patterns like "@*" would block scoped npm packages (e.g. @sentry/react) from resolving via node_modules. (by @xiaoxiaojx in #579)

5.21.2

Patch Changes

  • Fix TsconfigPathsPlugin circular project references causing stack overflow, add support for extending from unscoped npm packages, and use stat instead of readFile for existence checks in extends resolution. (by @xiaoxiaojx in #575)

  • perf: dedupe miss paths in DirectoryExistsPlugin/FileExistsPlugin and prune the per-resolve TsconfigPathsPlugin context scan. (by @alexander-akait in #574)

  • perf: drop a dead Map lookup in findMatch and flatten AliasFieldPlugin's cache check. (by @alexander-akait in #574)

  • perf: hot-path tweaks in ImportsFieldPlugin, AliasUtils, and util/entrypoints. (by @alexander-akait in #574)

  • perf: cut per-resolve allocations in Resolver.parse, loadDescriptionFile, and TsconfigPathsPlugin._selectPathsDataForContext. (by @alexander-akait in #574)

5.21.1

Patch Changes

  • Allocation-free reductions on hot-path code: hoist /#/g, /\$/g and /\\/g to module-level constants and gate the corresponding .replace calls behind includes(…) so paths/queries/requests without the match char skip the regex state machine entirely (the common case); share a single EMPTY_NO_MATCH tuple instead of allocating [[], null] per "no match" / "no condition matched" return; switch directMapping's for...of over mappingTarget and inner results to indexed loops to avoid iterator-object allocation per call; inline isConditionalMapping at its two hot-path call sites and merge the duplicate default / conditionNames.has(condition) branches in computeConditionalMapping; replace invalidSegmentRegEx.exec(…) !== null with .test(…) (no match-array allocation); drop the dead deprecatedInvalidSegmentRegEx.test(…) !== null clause in ImportsFieldPlugin (.test returns boolean; true !== null and false !== null are both true, so it was && true); drop the redundant relativePath.length === 0 guard before !startsWith("./") in ExportsFieldPlugin (the empty-string case is already covered). (by @alexander-akait in #558)

  • restore plugin compatibility for [...resolveContext.stack] iteration (by @alexander-akait in #569)

  • fix TsconfigPathsPlugin to support resolveSync with useSyncFileSystemCalls (by @alexander-akait in #572)

5.21.0

Minor Changes

  • Added promise API and support to resolve without context and resolveContext. (by @alexander-akait in #520)

  • Add extensionAliasForExports option. When true, extensionAlias also applies to paths resolved through the package.json exports field. Off by default to match Node.js; opt in for full TypeScript-resolver parity with packages that ship .ts sources alongside the compiled .js they declare in exports. (by @alexander-akait in #554)

Patch Changes

  • Properly handle DOS device paths (\\?\… and \\.\…). (by @alexander-akait in #551)

  • Prevent fallback to parent node_modules when the exports field target file is not found. (by @xiaoxiaojx in #495)

  • Imports field spec deviation: non-relative targets (e.g. "#a": "#b") no longer re-enter imports resolution, aligning with the Node.js ESM spec where PACKAGE_IMPORTS_RESOLVE does not recursively resolve # specifiers. (by @xiaoxiaojx in #503)

    Previously { "#a": "#b", "#b": "./the.js" } would chain-resolve #a to ./the.js; now it correctly fails, matching Node.js behavior.

  • Move cachedJoin/cachedDirname/createCachedBasename caches from module-level globals to per-Resolver instances. This prevents unbounded memory growth in long-running processes — when a Resolver is garbage collected, its join/dirname/basename caches are released with it. (by @xiaoxiaojx in #507)

  • Fixed when tsconfig: true is used (default config file) and no tsconfig.json exists. (by @xiaoxiaojx in #502)

  • Apply the extensionAlias option to the imports field to be align with typescript resolution. (by @alexander-akait in #549)

  • Improved performance of the many plugins. (by @alexander-akait in #529)

  • Replace the Set<string>-based resolver stack with a singly-linked StackEntry class that exposes a Set-compatible API. (by @xiaoxiaojx in #526)

    Each doResolve call now prepends a single linked-list node instead of cloning the entire Set, making stack push O(1) in time and memory. Recursion detection walks the linked list (O(n)), but because the stack is typically shallow this is much cheaper than cloning a Set per call.

  • Cache the result of stripJsonComments + JSON.parse in readJson using a WeakMap keyed by the raw file buffer. This avoids redundant comment-stripping and JSON parsing on every resolve call that reads tsconfig.json files (via stripComments: true), improving TsconfigPathsPlugin warm performance by ~20-35% depending on the depth of the extends chain. (by @xiaoxiaojx in #524)

  • Avoid OOM in CachedInputFileSystem when duration is Infinity. (by @alexander-akait in #527)

5.20.1

Patch Changes