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Changelog

6.0.1 / 2024-07-02

  • Fix - Restore usage of clone-deep as there was a corner case where structuredClone did not work as expected. #214

6.0.0 / 2024-07-02

  • Chore - Update internal dependencies. As a result, the package needs at least Node 18 to run.
  • Chore - Use structuredClone over clone-deep dependency since it is included to Node 18 or above. #214

5.10.0 / 2023-10-16

  • Feat - Support object/array-formed condition for mergeWithRules. #212

5.9.0 / 2023-05-22

  • Feat - Support deep merging when rule is a merge. #193, #206

5.8.0 / 2021-06-07

  • Docs - Update env example to be webpack 5 compatible. #177, #180
  • Feat - Support strings as rules for TypeScript, not just enums. #179, #185

5.7.3 / 2020-12-22

  • Fix - Don't merge strings with objects in mergeWithRules. #172

5.7.2 / 2020-12-16

  • Fix - If there's no match when using merge operation with mergeWithRules, use default merge behavior as a fallback. #167

5.7.1 / 2020-12-16

  • Fix - Fix a merge failure for mergeWithRules when non-array matches are merged. #166

5.7.0 / 2020-12-12

  • Feat - Throw a TypeError if trying to use mergeWithRules with invalid configuration types for append/prepend/merge operations.

5.6.1 / 2020-12-11

  • Fix - Drop extraneous logging.

5.6.0 / 2020-12-11

  • Feat - Support merge (CustomizeRule.Merge) for objects at mergeWithRules. This is useful for merging loader options for example. #163

5.5.0 / 2020-12-10

  • Feat - Allow mergeWithRules to merge based on rules without a match. #151 #159

5.4.1 / 2020-12-08

  • Fix - Allow mergeUnique to work with arbitrary order. #161

5.4.0 / 2020-10-30

  • Fix - Fall back correctly in mergeWithRules for cases that aren't matched. #157 #158
  • Fix - Don't throw if using mergeWithRules without a rule #151
  • Feat - Throw if undefined is passed to merge as a structure to merge

5.3.0 / 2020-10-30

  • Fix - Expose Configuration type through a generic to TypeScript to support both webpack 4 and 5 #141 #154

In case you use webpack 4, please change your typing as instructed in the readme as the default type is loose but non-breaking.

5.2.0 / 2020-10-07

  • Feature - Support advanced merging cases through mergeWithRules #146 #149

5.1.4 / 2020-09-09

  • Fix - Expose CustomizeRule for TypeScript users #147

5.1.3 / 2020-08-30

  • Fix - Allow merging a RegExp to itself #145

5.1.2 / 2020-08-18

  • Fix - Allow overriding an object field with null #144

5.1.1 / 2020-08-04

  • Fix - Drop <reference types="webpack-dev-server" /> from index.d.ts #143

5.1.0 / 2020-08-03

  • Feature - Expose merge as default for backwards-compatibility with TypeScript. Now import merge from "webpack-merge"; works there. In CommonJS, the default alias is exposed through default property due to technical constraints.

5.0.9 / 2020-07-09

  • Fix - Don't crash on merge() and merge([]). Now {} is returned in these corner cases.

5.0.8 / 2020-07-07

  • Fix - Support Node 10 #138

5.0.7 / 2020-07-06

  • Fix - Drop tslib dependency by setting "importHelpers": false,

5.0.6 / 2020-07-06

  • Fix - Add tslib to dependencies

5.0.5 / 2020-07-06

  • Tech - Optimize build size (UMD isn't needed)

5.0.4 / 2020-07-06

  • Documentation - Use CommonJS imports at the examples. #137

5.0.3 / 2020-07-06

  • Feature - Support TypeScript out of the box. #84 #86 #95 #110 #112
  • Deprecation - merge.smart has been dropped as it's tricky to support all the corner cases. Instead, it's better to use the provided utilities to put together a merge that fits your case.
  • Deprecation - mergeStrategy has been dropped in favor of using mergeWithCustomize with customizeArray and customizeObject.
  • Deprecation - merge.multiple has been dropped as the functionality was too specific and it's better to implement in the user space if needed.
  • Breaking - merge has been moved as a regular import (i.e. import { merge } from 'webpack-merge').
  • Breaking - Merge customization has been moved behind mergeWithCustomize.
  • Breaking - Bump supported Node version to 12
  • Feature - customizeArray supports wildcards now. Example: 'entry.*': 'prepend'. #45 #99
  • Feature - Throw an error in case a Promise is being merged. It's better to wrap configuration within a Promise and merge inside it. #81
  • Fix - Drop lodash in favor of simpler dependencies. #134
  • Fix - Make unique merge from right to left to match behavior elsewhere. #119
  • Fix - Make sure unique doesn't lose non-unique items to merge. #125

Special thanks to Google and Addy Osmani for supporting the work financially as it allowed me to complete the work required by the new major release.

4.2.2 / 2019-08-27

  • Fix - Update minimum version of lodash to 4.17.15 in order to avoid npm audit warning. #116
  • Docs - Improve merge.unique documentation. #103
  • Docs - Add clear note about precedence. #115

4.2.1 / 2019-01-04

  • Feature - Support oneOf at merge.smart. #111
  • Fix - If there's only single array to merge, clone it. #106

4.1.4 / 2018-08-01

  • Maintenance - Remove bitHound from the README as it closed down. #102

4.1.3 / 2018-06-14

  • Fix - Smart merge respects the existing loader order #79, #101

4.1.2 / 2017-02-22

  • Maintenance - Update lodash, #97, #98

4.1.1 / 2017-11-01

  • Docs - Add customizeArray and customizeObject examples. #93

4.1.0 / 2017-03-16

  • Feature - merge.multiple to allow working with webpack multi-compiler mode. It accepts multiple objects and returns an array you can push to webpack. #74

4.0.0 / 2017-03-06

  • Breaking feature - merge.smart allows re-ordering loaders like below. #70
merge.smart(
  {
    loaders: [
      {
        test: /\.js$/,
        loaders: ["babel"],
      },
    ],
  },
  {
    loaders: [
      {
        test: /\.js$/,
        loaders: ["react-hot", "babel"],
      },
    ],
  },
);
// will become
{
  loaders: [
    {
      test: /\.js$/,
      // order of second argument is respected
      loaders: ["react-hot", "babel"],
    },
  ];
}

3.0.0 / 2017-02-19

  • Breaking fix - merge.smart should not merge a child missing include/exclude to a parent that has either. This is safer and more predictable behavior than the old one. #69

2.6.1 / 2017-01-29

  • Bug fix - merge.smart should not merge rules that have differing enforce fields. #65

2.6.0 / 2017-01-27

  • Bug fix - Support replace mode for merge.smartStrategy. #63

2.5.0 / 2017-01-26

  • Bug fix - Make sure merge.smartStrategy works with higher level nesting like 'module.rules.use': 'prepend'. #64

2.4.0 / 2017-01-12

  • Feature - Add merge.unique helper that plugs into customizeArray. This allows you to force only one plugin of a type to the end result. #58

2.3.1 / 2017-01-06

  • Bug fix - Clear up CopyWebpackPlugin handling. #56

2.3.0 / 2017-01-06

  • Refactor - Depend only on lodash instead of individual packages as latter has been discontinued. #52

2.2.0 / 2017-01-05

  • Bug fix - Drop merge.smartStrategy(rules, plugins) as that caused other issues (prototype copying for complex cases). That needs a better approach. #55

2.1.1 / 2017-01-05

  • Bug fix - Avoid recursion at merge.smart. #53

2.1.0 / 2017-01-05

  • Feature - Allow merge.smartStrategy to merge plugin contents. API: merge.smartStrategy(rules, plugins). #44. Example:
const output = merge.smartStrategy(
  {
    entry: 'prepend', // or 'replace'
    'module.loaders': 'prepend'
  },
  ['LoaderOptionsPlugin']
)(object1, object2, object3, ...);

2.0.0 / 2016-12-22

  • Breaking - Disallow overriding configuration with empty arrays/objects (#48). If you want to override, use merge.strategy. Example:
const a = {
  entry: ["foo"],
};
const b = {
  entry: [],
};

merge(a, b); // Yields a result, not b like before.

1.1.2 / 2016-12-18

  • Bug fix - merge({ entry: {} }) should return the same result as input instead of a function.

1.1.1 / 2016-12-11

  • Bug fix - Support previously undocumented, yet used, merge([<object>]) format. This works with all available functions. #46

1.1.0 / 2016-12-09

  • Feature - Allow merge behavior to be customized with overrides. Example:
var output = merge({
  customizeArray(a, b, key) { return [...a, ...b]; },
  customizeObject(a, b, key) { return mergeWith(a, b); }
})(object1, object2, object3, ...);

This allows you to guarantee array uniqueness and so on.

1.0.2 / 2016-11-29

  • Bug fix - merge should not mutate inputs with mismatched keys.

1.0.0 / 2016-11-28

  • Feature: Support merging Webpack 2 Rule.use. #38
  • Bug fix - Don't concat loaders if the first matching entry's include/exclude doesn't match. #39

0.20.0 / 2016-11-27

  • Feature: Add support for merging functions. This feature has been designed postcss in mind. It executes the functions, picks their results, and packs them again.

0.19.0 / 2016-11-26

  • Feature: Add support for 'replace' option at merge.strategy. It literally replaces the old field value with the newer one. #40

0.18.0 / 2016-11-24

  • Feature: Add support for recursive definitions at merge.strategy. Example:
var output = merge.strategy({
  entry: 'prepend',
  'module.loaders': 'prepend'
})(object1, object2, object3, ...);
  • Feature: Add merge.smartStrategy. This combines the ideas of merge.smart and merge.strategy into one. Example:
var output = merge.smartStrategy({
  entry: 'prepend',
  'module.loaders': 'prepend'
})(object1, object2, object3, ...);

0.17.0 / 2016-11-16

  • Feature: Add support for merge.strategy. Now you can customize merging behavior per root level configuration field. Example: merge.strategy({ entry: 'prepend' })(object1, object2, object3, ...);. #17

0.16.0 / 2016-11-14

  • Feature: Add support for webpack 2 at merge.smart. It should pick up module.rules as you might expect now. #35

0.15.0 / 2016-10-18

  • Breaking: Rework merge.smart so that it appends loaders instead of prepending them. This is the logical thing to do as it allows you to specify behavior better as you merge. #32

0.14.1 / 2016-07-25

  • Docs: Improve package description. #23.
  • Bug fix - Let merge.smart merge loaders based on their full name instead of first letter. Thanks to @choffmeister. #26.

0.14.0 / 2016-06-05

  • Feature: Allow merge.smart to merge loaders if exclude is the same. Thanks to @mshwery. #21.

0.13.0 / 2016-05-24

  • Bug fix: Allow merge.smart to merge configuration if include is defined. Thanks to @blackrabbit99. #20.

0.12.0 / 2016-04-19

  • Feature: Support include/exclude at merge.smart for loader definition too. Thanks to @Whoaa512. #16.

0.11.0 / 2016-04-18

  • Feature: Support include/exclude at merge.smart when its set only in a parent. #15.

0.10.0 / 2016-04-10

  • Feature: Support include/exclude at merge.smart. Thanks to @siready. #14.

0.9.0 / 2016-04-08

  • Feature: Allow existing objects/arrays to be emptied with an empty object/array later in merge. This overriding behavior is useful for example emptying your entry configuration.

0.8.4 / 2016-03-17

  • Bug fix: webpack-merge should not mutate inputs. #12

0.8.3 / 2016-03-02

  • Bug fix: Drop files field from package.json as it wasn't including the dist correctly.

0.8.0 / 2016-03-02

  • Breaking: Change merging behavior so that only loaders get prepended. The rest follow appending logic. This makes entry array merging behavior logical. Prepend makes sense only for loaders after all. #10

0.7.3 / 2016-01-11

  • Bug fix: Do not error when there are no matching loaders. Thanks @GreenGremlin!

0.7.2 / 2016-01-08

  • Regenerate tarball. The problem was that there were some old dependencies included. Closes #7.

0.7.1 / 2016-01-03

  • Improve performance by defaulting to concat and by dropping a redundant check. Thanks @davegomez!

0.7.0 / 2015-12-31

  • Bug fix: Arrays get merged within nested structures correctly now. Array items are prepended (reverse order compared to earlier). This is related to the change made in 0.6.0. Incidentally this change affects normal merge as well.
  • Smart merge: If a loader contains either include or exclude, it will generate separate entries instead of merging. Without this the configuration might change in an unpredictable manner.

0.6.0 / 2015-12-30

  • Support preLoaders and postLoaders. Previously only loaders were supported.
  • Breaking: Change smart merging behavior for loaders field so that it prepends loaders instead of appending them. The benefit of this is that now it's possible to specialize loader setup in a predictable manner. For example you can have a linter set up at the root and expect it to become evaluated first always.

0.5.1 / 2015-12-26

  • Fix merge object/array case (missing bind). The behavior should be correct now.

0.5.0 / 2015-12-26

  • Breaking: Push smart merging behind merge.smart. Now merge behaves exactly as in 0.3.0 series.

0.4.0 / 2015-12-23

  • Dropped changelog generator. It's better to write these by hand.
  • Breaking: Added smart merging (@GreenGremlin)

0.3.2 / 2015-11-23

  • Tweaked changelog generator process.

0.3.1 / 2015-11-23

  • Added changelog generator.

0.3.0 / 2015-11-13

  • Improved formatting
  • Allowed an arbitrary amount of objects to be merged

0.2.0 / 2015-08-30

  • Only require lodash modules used by the package (@montogeek)
  • Removed lodash.isarray dependency, use Array.isArray standard object

0.1.3 / 2015-08-10

  • Improved README example

0.1.2 / 2015-07-01

  • Simplified example

0.1.1 / 2015-06-26

  • Fixed travis link

0.1.0 / 2015-06-26

  • Initial implementation