Minor Changes

• Allow resolving worker module by export condition name when using new Worker() (by @hai-x in #20353)

• Detect conditional imports to avoid compile-time linking errors for non-existent exports. (by @hai-x in #20320)

• Added the tsconfig option for the resolver options (replacement for tsconfig-paths-webpack-plugin). Can be false (disabled), true (use the default tsconfig.json file to search for it), a string path to tsconfig.json, or an object with configFile and references options. (by @alexander-akait in #20400)

• Support import.defer() for context modules. (by @ahabhgk in #20399)

• Added support for array values ​​to the devtool option. (by @hai-x in #20191)

• Improve rendering node built-in modules for ECMA module output. (by @hai-x in #20255)

• Unknown import.meta properties are now determined at runtime instead of being statically analyzed at compile time. (by @xiaoxiaojx in #20312)

Patch Changes

• Fixed ESM default export handling for .mjs files in Module Federation (by @y-okt in #20189)

• Optimized import.meta.env handling in destructuring assignments by using cached stringified environment definitions. (by @xiaoxiaojx in #20313)

• Respect the stats.errorStack option in stats output. (by @samarthsinh2660 in #20258)

• Fixed a bug where declaring a module variable in module scope would conflict with the default moduleArgument. (by @xiaoxiaojx in #20265)

• Fix VirtualUrlPlugin to set resourceData.context for proper module resolution. Previously, when context was not set, it would fallback to the virtual scheme path (e.g., virtual:routes), which is not a valid filesystem path, causing subsequent resolve operations to fail. (by @xiaoxiaojx in #20390)

• Fixed Worker self-import handling to support various URL patterns (e.g., import.meta.url, new URL(import.meta.url), new URL(import.meta.url, import.meta.url), new URL("./index.js", import.meta.url)). Workers that resolve to the same module are now properly deduplicated, regardless of the URL syntax used. (by @xiaoxiaojx in #20381)

• Reuse the same async entrypoint for the same Worker URL within a module to avoid circular dependency warnings when multiple Workers reference the same resource. (by @xiaoxiaojx in #20345)

• Fixed a bug where a self-referencing dependency would have an unused export name when imported inside a web worker. (by @samarthsinh2660 in #20251)

• Fix missing export generation when concatenated modules in different chunks share the same runtime in module library bundles. (by @hai-x in #20346)

• Fixed import.meta.env.xxx behavior: when accessing a non-existent property, it now returns empty object instead of full object at runtime. (by @xiaoxiaojx in #20289)

• Improved parsing error reporting by adding a link to the loader documentation. (by @gaurav10gg in #20244)

• Fix typescript types. (by @alexander-akait in #20305)

• Add declaration for unused harmony import specifier. (by @hai-x in #20286)

• Fix compressibility of modules while retaining portability. (by @dmichon-msft in #20287)

• Optimize source map generation: only include ignoreList property when it has content, avoiding empty arrays in source maps. (by @xiaoxiaojx in #20319)

• Preserve star exports for dependencies in ECMA module output. (by @hai-x in #20293)

• Consider asset modulem to be side-effect free. (by @hai-x in #20352)

• Avoid generating JavaScript modules for CSS exports that are not used, reducing unnecessary output and bundle size. (by @xiaoxiaojx in #20337)

5.104.1

Patch Changes

• 2efd21b: Reexports runtime calculation should not accessing WEBPACK_IMPORT_KEY decl with var.
• c510070: Fixed a user information bypass vulnerability in the HttpUriPlugin plugin.

5.104.0

Minor Changes

• d3dd841: Use method shorthand to render module content in __webpack_modules__ object.
• d3dd841: Enhance import.meta.env to support object access.
• 4baab4e: Optimize dependency sorting in updateParent: sort each module only once by deferring to finishUpdateParent(), and reduce traversal count in sortWithSourceOrder by caching WeakMap values upfront.
• 04cd530: Handle more at-rules for CSS modules.
• cafae23: Added options to control the renaming of at-rules and various identifiers in CSS modules.
• d3dd841: Added base64url, base62, base58, base52, base49, base36, base32 and base25 digests.
• 5983843: Provide a stable runtime function variable __webpack_global__.
• d3dd841: Improved localIdentName hashing for CSS.

Patch Changes

• 22c48fb: Added module existence check for informative error message in development mode.
• 50689e1: Use the fully qualified class name (or export name) for [fullhash] placeholder in CSS modules.
• d3dd841: Support universal lazy compilation.
• d3dd841: Fixed module library export definitions when multiple runtimes.
• d3dd841: Fixed CSS nesting and CSS custom properties parsing.
• d3dd841: Don't write fragment from URL to filename and apply fragment to module URL.
• aab1da9: Fixed bugs for css/global type.
• d3dd841: Compatibility import.meta.filename and import.meta.dirname with eval devtools.
• d3dd841: Handle nested __webpack_require__.
• 728ddb7: The speed of identifier parsing has been improved.
• 0f8b31b: Improve types.
• d3dd841: Don't corrupt debugId injection when hidden-source-map is used.
• 2179fdb: Re-validate HttpUriPlugin redirects against allowedUris, restrict to http(s) and add a conservative redirect limit to prevent SSRF and untrusted content inclusion. Redirects failing policy are rejected before caching/lockfile writes.
• d3dd841: Serialize HookWebpackError.
• d3dd841: Added ability to use built-in properties in dotenv and define plugin.
• 3c4319f: Optimizing the regular expression character class by specifying ranges for runtime code.
• d3dd841: Reduce collision for local indent name in CSS.
• d3dd841: Remove CSS link tags when CSS imports are removed.

Features

• Added DotenvPlugin and top level dotenv option to enable this plugin
• Added WebpackManifestPlugin
• Added support the ignoreList option in devtool plugins
• Allow to use custom javascript parse function
• Added import.meta.env support for environment variables
• Added support for import.meta.dirname and import.meta.filename
• Added support import.defer() for statistical path
• Handle import.meta.main
• Added suport to setup named exports for JSON modules and disable usage named export for import file from "./file.json" with { type: "json" }
• Added support __dirname/__filename/import.meta.dirname/import.meta.filename for universal target
• [CSS] Added the exportType option with link (by default), "text" and css-style-sheet values
• [CSS] Added support for composes properties

Fixes

• The dependOn chunk must be loaded before the common chunk
• Return to namespace import when the external request includes a specific export
• No runtime extra runtime code for module libraries
• Delay HMR accept dependencies to preserve import attributes
• Properly handle external presets for universal target
• Fixed incorrect identifier of import binding for module externals
• Fixed when defer import and dynamic default export mixed
• Reduce generated output when globalThis supported
• Fixed loading async modules in defer import
• Reexport module for default import when no used exports for systemjs library
• Rename HarmonyExportDependencyParserPlugin exported id to CompatibilityPlugin tagged id
• Handle __dirname and __filename for ES modules
• Rename single nested __webpack_export__ and __webpack_require__ in already bundled code
• [Types] webpack function type
• [Types] NormalModule type
• [Types] Multi compiler configuration type
• [Types] Fixed regression in custom hashDigest type
• [CSS] No extra runtime for initial chunk
• [CSS] Fixed a lot of CSS modules bugs

Fixes

• Supported extends with env for browserslist
• Supported JSONP fragment format for web workers.
• Fixed dynamic import support in workers using browserslist.
• Fixed default defer import mangling.
• Fixed default import of commonjs externals for SystemJS format.
• Fixed context modules to the same file with different import attributes.
• Fixed typescript types.
• Improved import.meta warning messages to be more clear when used directly.
• [CSS] Fixed CC_UPPER_U parsing (E -> U) in tokenizer.

Features

• Added static analyze for dynamic imports
• Added support for import file from "./file.ext" with { type: "bytes" } to get the content as Uint8Array (look at example)
• Added support for import file from "./file.ext" with { type: "text" } to get the content as text (look at example)
• Added the snapshot.contextModule to configure snapshots options for context modules
• Added the extractSourceMap option to implement the capabilities of loading source maps by comment, you don't need source-map-loader (look at example)
• The topLevelAwait experiment is now stable (you can remove experiments.topLevelAwait from your webpack.config.js)
• The layers experiment is now stable (you can remove experiments.layers from your webpack.config.js)
• Added function matcher support in rule options

Fixes

• Fixed conflicts caused by multiple concatenate modules
• Ignore import failure during HMR update with ES modules output
• Keep render module order consistent
• Prevent inlining modules that have this exports
• Removed unused timeout attribute of script tag
• Supported UMD chunk format to work in web workers
• Improved CommonJs bundle to ES module library
• Use es-lexer for mjs files for build dependencies
• Fixed support __non_webpack_require__ for ES modules
• Properly handle external modules for CSS
• AssetsByChunkName included assets from chunk.auxiliaryFiles
• Use createRequire only when output is ES module and target is node
• Typescript types

Performance Improvements

• Avoid extra calls for snapshot
• A avoid extra jobs for build dependencies
• Move import attributes to own dependencies

Fixes

• Fixed resolve execution order issue from extra await in async modules
• Avoid empty block for unused statement
• Collect only specific expressions for destructuring assignment

Fixes

• Fixed syntax error when comment is on the last line
• Handle var declaration for createRequire
• Distinguish free variable and tagged variable

Fixes

• Filter deleted assets in processAdditionalAssets hook
• HMR failure in defer module
• Emit assets even if invalidation occurs again
• Export types for serialization and deserialization in plugins and export the ModuleFactory class
• Fixed the failure export of internal function for ES module chunk format
• Fixed GetChunkFilename failure caused by dependOn entry
• Fixed the import of missing dependency chunks
• Fixed when entry chunk depends on the runtime chunk hash
• Fixed module.exports bundle to ESM library
• Adjusted the time of adding a group depending on the fragment of execution time
• Fixed circle dependencies when require RawModule and condition of isDeferred
• Tree-shakable module library should align preconditions of allowInlineStartup

Fixes

• Fixed concatenate optimization for ESM that caused undefined export
• Respect the output.environment.nodePrefixForCoreModules option everywhere
• Respect the output.importMetaName option everywhere
• Fixed await async dependencies when accepting them during HMR
• Better typescript types

Features

• Added colors helpers for CLI
• Enable tree-shaking for ESM external modules with named imports
• Added the deferImport option to parser options

Performance Improvements

• Fixed a regression in module concatenation after implementing deferred import support
• Fixed a potential performance issue in CleanPlugin
• Avoid extra require in some places