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Bugfixes

fix bug in sideEffects optimization when using export * from "non-esm" and a default export.
add missing optional peerDependencies for webpack-cli and webpack-command to support Yarn 2

`v4.44.0`

Features

Improve sideEffects flag behavior when dynamic modules are part of the tree
- Fixes a bug which causes empty modules (or type-only modules) to "break" Tree Shaking
add splitChunks.enforceSizeThreshold to allow enfore splitting larger chunks unrelated from other limiations
- Not set by default to avoid breaking change
- It will be set by default to 50k in webpack 5
- It's recommended to set it in webpack 4 too
add support for resolve.roots and default resolve.roots: [context]
- This allows to resolve server-relative urls (e.g. /src/abc) to the project root (or other locations when configured)
- This allows to use loaders that rely on that behavior

Bugfixes

fix bug where splitChunks produced non-optimal results when minSize is set to 0
- This lead to NaNs in some places which breaks ordering
Fix bug which lead to HMR not working for splitChunks in entrypoints
force update watchpack and chokidar for chokidar bugfix which causes files to stop being watched

`v4.43.0`

Features

add module.hot.invalidate() to HMR API

Dependencies

push versions for forced security updates

`v4.42.1`

Bugfixes

update webassemblyjs dependencies for instruction update
update mkdirp dependency for security reasons

`v4.42.0`

Bugfixes

Disable constant replacements in "use asm" scope
Update schema to disallow functions for output.hotUpdateChunkFilename as this doesn't work
Hoist exports in concatenated module to handle circular references with non-concatenated modules correctly
Flag all modules as used in DLLs to fix missing exports

`v4.41.6`

Bugfixes

Windows network paths are considered as absolute paths
fix hanging of FlagDependencyExportsPlugin when using export * in a circular matter

`v4.41.5`

Bugfixes

handle relative paths with webpack:// prefix in SourceMaps correctly
fixes a non-determinism about providedExports with export * which caused changing module hashes and unnecessary HMR invalidation

`v4.41.4`

Bugfixes

fix case where __webpack_require__.e is not a function when using module concatenation
fix incorrect imported module when using sideEffects in a certain constellation of export names

Performance

lazy-require Webassembly related modules for improved startup performance

`v4.41.3`

Security

force upgrade terser-webpack-plugin dependency for security fix (not affecting webpack)

Funding

add npm funding field to package.json

`v4.41.2`

Bugfixes

fix issue with invalide timezone

`v4.41.1`

Bugfixes

fix incorrect request shortening when directory looks similar to parent directory
fix crash when timezone is unknown

`v4.41.0`

Developer Experience

disallow cache group named test with shorthand syntax to point out a potential config error

Performance

Improve performance of LimitChunkCountPlugin

`v4.40.3`

Bugfixes

fix a bug that the HMR plugin affected child compilations

Performance

improve performance of splitChunks name option by caching hashed value
improve rebuild performance by caching module size computation

`v4.40.2`

Bugfixes

fix a bug where asset is undefined

`v4.40.1`

Bugfixes

convert "multiple assets emit to the same filename" error into a warning
compare asset content when multiple assets emit to the same filename

`v4.40.0`

Features

adds asset info for emitted assets
- new methods allow easy emitting/updating of assets compilation.emitAsset/updateAsset (instead of accessing the Object compilation.assets)
- new getter methods to get assets compilation.getAssets() and compilation.getAsset(name)
- 3 flags in asset info:
  - immutable: when set an asset can be cache infinitely
  - development: when set an asset is some kind of development tool (i. e. a SourceMap)
  - hotModuleReplacement: when set an asset is generated for an hot update
- Stats expose info object in assets
- String version of Stats show flags

`v4.39.3`

Bugfixes

fix a missing module in chunk caused by incorrect chunk graph generation of async chunks

`v4.39.2`

Bugfixes

fix ProfilingPlugin not ending traces correctly

`v4.39.1`

Bugfixes

fix problem that progress lines were too long on some terminals
fix a problem that ...100% is displayed instead of 100%

`v4.39.0`

Features

Infrastructure logger for node.js has now colors + symbols to mark different kind of messages
Logger API has now a status method which allows to write temporary status messages
ProgressPlugin default handler uses the Infrastructure Logger status message to output messages
Placeholders in paths can now be escaped with i. e. [\id\]
Compiler.hooks.assetEmitted have been added to get byte content of emitted assets

Bugfixes

Logging output is now aligned to have space for symbols
renamed Compiler.hooks.infrastructurelog to Compiler.hooks.infrastructureLog
Properties that are defined on the Object.prototype can now be chunk ids (i. e. constructor)
library.name now supports placeholders in libraryTarget: "system"
2 places were module profiles were incorrectly captured were fixed

Dependencies

Forced upgrade of all direct dependencies
webpack-sources + terser-webpack-plugin comes with quality optimizations for SourceMaps

`v4.38.0`

Performance

Improved performance of ProgressPlugin
Improved performance of chunk graph generation
- This can boost performance when many chunks are used, especially incremental build performance
- Modules from parent chunks are now tracked during chunk graph generation, which allows to skip these modules in async chunks. This often renders optimization.removeAvailableModules unneeded, expect in scenarios where chunks are merged during optimization.
optimization.removeAvailableModules is now disabled in development mode by default
- optimization.removeAvailableModules will be disabled for all modes in next major release, feel free to disable it in production too if you want extra performance.

`v4.37.0`

Features

add logging API (see #9436 for details)

`v4.36.1`

Bugfixes

fix regression in 4.36.0 when using happypack

`v4.36.0`

Features

SourceMapDevToolPlugin append option now supports the default placeholders in addition to [url]
Arrays in resolve and parser options (Rule and Loader API) support backreferences with "..." when overriding options.

`v4.35.3`

Bugfixes

update acorn to include import()

Performance

Improved runtime performance for large JSON modules

`v4.35.2`

Bugfixes

realResource must match absolute paths

`v4.35.1`

Bugfixes

add realResource condition in rule to schema
fixes order of loaders when using a matchResource

`v4.35.0`

Features

ProgressPlugin limit output to column width in terminal
add Watching.suspend and Watching.resume
add splitChunks.automaticNameMaxLength and splitChunks.cacheGroups[x].automaticNameMaxLength

Bugfixes

webworker target now respect publicPath when loading chunks
holey arrays of configs will fail the validation

`v4.34.0`

Features

Error message when parsing fails shows used loaders now

Bugfixes

importing the namespace object from non-ESM (CJS) modules no longer leads to an warning
Error message in HMR logging works for Firefox too now
Parser understands block scoping now

`v4.33.0`

Features

add target: "electron-preload" for electron 5
- renderer should use target: "web" in electron 5

Bugfixes

fix HMR rejection of removed and readded self-accepted modules

`v4.32.2`

Bugfixes

fix some weird schema validation messages
fix problem in production mode (sideEffects + concatenation) which caused reexported values to become undefined (bug since 4.32.0)

`v4.32.1`

Bugfixes

reverts some changes from 4.32.0 which accidentally disabled some CommonJs features when using node: false.

`v4.32.0`

Features

Added this.mode to the loader API, to allow loaders to choose defaults by mode similar to webpacks options
Stack Trace for Errors in rejected Promises from import() now includes the stack from where the import() was called

Bugfixes

The Parser can now analyse identifiers in rest patterns too
- const { a, ...rest } = obj, where rest conflicts with an imported binding etc.
node: false now correctly disables __dirname and __filename too
__dirname and __filename now no longer evaluates to something when node: false or node.__file/dirname: false is set
- if(__dirname !== "") is no longer replaced with if(true) in such scenarios
prefetching chunks is no executed after the initial module evaluation
- This allows to override i. e. __webpack_public_path__ for prefetching too
fixes a runtime crash when using side-effect-free modules with the DllPlugin

Contribute

CI tests node.js 12 now too
webpack-bot now merges dependabot PRs automatically when status checks succeed

`v4.31.0`

Features

add errors-warnings stats preset

Bugfixes

allow top-level return in non-ESM modules

`v4.30.0`

Features

add amd: false to disable AMD support
Compilation.hooks.finishModules now also allows async plugins
add output.libraryTarget: "system" to compile for SystemJs environment

Bugfixes

fix generating a null id when concatenating an entry module in a different chunk
fix unneeded chunk references when splitting modules from chunks
fix parsing of function name in function scope

Performance

Lazy require some internal files
Faster way to generate function headers

Contributing

Run prettier on examples markdown

`v4.29.6`

Bugfixes

typeof __webpack_require__ and require.onError is no longer evaluated to undefined and evaluation is done at runtime instead.
this value in module.hot.accept with imported dependency is correctly preserved.
webassemblyjs updated to latest version

Contributing

added a linting step to ensure all dependencies resolve to npm modules

`v4.29.5`

Bugfixes

update @webassemblyjs to remove git dependency

`v4.29.4`

Bugfixes

update @webassemblyjs for bugfixes

`v4.29.3`

Bugfixes

fixes a bug where import() context uses __webpack_require__.e, but it is not in the runtime
WebpackErrors now console.log correctly in node > 10

`v4.29.2`

Internal changes

update dependencies

`v4.29.1`

Bugfixes

add missing __esModule flag when modules are concatenated, but without usage information

`v4.29.0`

Important Note for npm users

This release updates some dependencies, which may trigger a npm bug. See here for the webpack issue. The npm bug has been fixed, but a new npm version has not been released yet.

For workarounds see this comment.

Eventually the fix will be to upgrade npm once the bugfix is released.

Features

update acorn to v6
limit the number of in parallel written output files to 15
add output.futureEmitAssets which gives the emitting logic of webpack 5
- assets are replaced with SizeOnlySources
- reading assets after emitting is no longer allowed
- This allows memory to be garbage-collected

`v4.28.4`

Bugfixes

ProfilingPlugin creates output path if not existing
fixed support for arrow function functions for optimization.minimizer
failed hooks is now also called when run() fails

`v4.28.3`

Bugfixes

ProfilingPlugin creates the output folder if necessary

`v4.28.2`

Bugfixes

fixes a crash when multiple IgnorePlugins are used

`v4.28.1`

Bugfixes

fix error in IgnorePlugin when no contextRegExp is passed

`v4.28.0`

Features

IgnorePlugin: checkResource has an additional context argument

Bugfixes

Injection of node.js globals has been disabled for .mjs files as it's crashing

`v4.27.1`

Bugfixes

v4.27.0 accidentially introduced a breaking change. This reverts the change and restores the original behavior for splitChunks enforce.

`v4.27.0`

Features

When using functions as plugins they are now also called with the compiler as parameter
- This make it possible to use arrow functions as plugins
splitChunks.maxSize now emits a warning when minSize > maxSize
Loaders have now access to a getResolve method to create their own resolver function with custom options

Bugfixes

splitChunks.cacheGroups.xxx.enforce now behaves as documented and enforce chunk creation
splitChunks.cacheGroups.xxx.enforce now no longer deletes minSize for maxSize
fixes a bug where splitChunks cause cacheGroups to be incorrectly merged when using the same name
- now conditions are considered per cacheGroup
- the correct cache group comment is displayed in stats
fixes a bug which causes providedExports not to be updated on rebuilds when using export * from

`v4.26.1`

Bugfixes

fix a bug where splitChunks.maxSize causes a hanging build
fix a bug where splitChunks.maxSize crashes when minSize > maxSize
fix a edgecase where splitChunks.maxSize can cause chunks bigger than minSize
remove unnecessary code from global builtin

`v4.26.0`

Features

Switch from uglify-es to terser as default minimizer

Note: While they are officially backward-compatible, it can still happen that a new bugs occurs with terser, which break your production builds. Make sure to validate your production builds after upgrading to this version. (Note that it's always a good idea to test your output assets before deploying.)

If you want to report bugs to terser (https://github.com/terser-js/terser), please provide a minimal repro case with minimized and non-minimized code. You can configure webpack to generate non-minimized code in production mode by setting optimization.minimize: false. When reporting a bug to terser, best report a repro case which doesn't require running webpack and is reproducible with only the terser command line.

See optimization.minimizers configuration option to switch back to uglify-es or provide additional minimize options for terser.

`v4.25.1`

Bugfixes

fix replacement of compile-time constant expression when expression is a wrapped expression (string prefix and/or suffix).

`v4.25.0`

Features

add format option to DllPlugin to allow generating formated manifest json
add flags to ProgressPlugin to add and remove information
- entrypoint counter was added, but disabled by default to avoid breaking change

Bugfixes

fix code generation for context dependencies when replacing compile-time constant expressions
disable the effect of the ProvidePlugin for .mjs

`v4.24.0`

Features

allow to pass no dependencies to DefinePlugin runtime value
- DefinePlugin.runtimeValue(() => {...}, true) is always evaluated
add module argument to DefinePlugin.runtimeValue

Bugfixes

update webassemblyjs dependency
fix bug when using entry names that look like numbers with HMR

`v4.23.1`

Bugfixes

add space when replacing expression with constant
- i. e. for code like return'development'===process.env.NODE_ENV&&'foo'

`v4.23.0`

Features

add watchMode flag to Compiler to be able to detect watch mode in plugins
Prefer chunk names of entrypoints when merging chunks
add removedFiles property to Compiler to detect removed files

Bugfixes

publish declarations to npm
upgrade @webassemblyjs/* for bugfix
fix crash when using a side-effect-free wasm module in production mode

Internal changes

test on node.js 12
fix memory leak in test suite

`v4.22.0`

Features

Add support for evaluating && and || expressions

Bugfixes

fix problems where order of things where not deterministic

Performance

improve performance of chunk graph creation
- this will improve rebuild performance in watch mode

`v4.21.0`

Features

add output.libraryTarget: "amd-require" which generates a AMD require([], ...) wrapper instead of a define([], ...) wrapper
support arrays of strings passed to output.library, which exposes the library to a subproperty

Bugfixes

fix cases where __webpack_require__.e is used at runtime but is not defined in the bundle
fix behavior of externals of global type

Performance

Some performance improvements to the chunk graph generation

`v4.20.2`

Bugfixes

keep comments in export default in concatenated modules

`v4.20.1`

Bugfixes

fix crash when using libraryTarget: "amd" without library name

`v4.20.0`

Bugfixes

update dependencies (webpack-sources, @webassemblyjs/*)
Handle errors thrown in renderes without crashing

Internal changes

Extended typings
Update internal structure of options schema to generate typings
- Note: this exposed an issue in webpack-cli, you need to upgrade to webpack-cli@3.1.1

`v4.19.1`

Bugfixes

Internal requested filename for import() with target: "electron-main" uses correct path separator on windows
(This fixes a problem with filemappings in vscode)
devtool: "source-map" and variants generate SourceMaps when output file is .mjs
browser field as object is used when using target: "electron-renderer"
Comments near export default are preserved
Passing an array as externals value, now works correctly as documented

`v4.19.0`

Bugfixes

Create a hash of the whole runtime code for the chunk/contenthash of entry chunks
- Before hash was (incorrectly) calculated from (some) inputs

`v4.18.1`

Bugfixes

Update tapable version, which fixes a memory leak

`v4.18.0`

Features

Upgrade webassemblyjs dependency

`v4.17.3`

Bugfixes

Fix exit code when multiple CLIs are installed
No longer recommend installing webpack-command, but still support it when installed

`v4.17.2`

Bugfixes

fix a spacing issue with the ProgressPlugin on some terminals
force-upgrade webpack-sources for performance improvement (was already in semver range)

`v4.17.1`

Bugfixes

fix missing reexports in export * in a concatenated module

`v4.17.0`

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

Features

allow to provide custom functions to IgnorePlugin

Bugfixes

remove incorrectly emitted dead code in concatenated modules
chunk ids contribute to [contenthash] for js assets
fix crash when trying to export globals in concatenated modules

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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sonarqubecloud · 2023-12-03T11:09:02Z

Kudos, SonarCloud Quality Gate passed!

No Coverage information
0.0% Duplication

sonarqubecloud · 2025-03-11T11:37:03Z

Quality Gate passed

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

sonarqubecloud · 2025-05-19T17:35:59Z

Quality Gate passed

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

sonarqubecloud · 2025-08-10T14:25:47Z

Quality Gate passed

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

sonarqubecloud · 2025-09-25T21:01:39Z

Quality Gate passed

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

sonarqubecloud · 2025-11-18T20:11:38Z

Quality Gate passed

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

sonarqubecloud · 2026-01-19T18:50:35Z

Quality Gate passed

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code