# babel-loader: what changed from 9 to 10

- Product: babel-loader (https://whatsnew.fyi/product/babel-loader)
- Vendor: Babel
- Range: changelog entries numbered after v9.2.1 up to and including v10.1.1, stable releases only
- Entries below: 3 releases (newest first)
- Resolved: 9 is v9.2.1 and 10 is v10.1.1, the newest stable release of each major we track
- Carrying security changes: 0 · CVEs mentioned: 0 · Mentioning breaking changes: 1 · Removing or deprecating something: 0
- Page: https://whatsnew.fyi/product/babel-loader/compare/9...10

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

## What changed (10 changes, grouped by kind)

### Added

#### v10.1.0 (2026-03-06)

- Enable type checking and support Babel 8

#### v10.0.0 (2025-02-27)

- Add babel-loader logger
- Support cache with external dependencies

### Changed

#### v10.1.0 (2026-03-06)

- Use `module.findPackageJSON` API for package discovery

#### v10.0.0 (2025-02-27)

- Bump Node requirement to ^18.20.0 || ^20.10.0 || >=22.0.0 and webpack requirement to >= 5.61.0
- Use output.hashFunction as loader cache hasher
- Replace find-cache-dir with find-up

### Fixed

#### v10.1.1 (2026-03-09)

- Revert use of module.findPackageJSON API

#### v10.1.0 (2026-03-06)

- Mark webpack as optional peer dependency

#### v10.0.0 (2025-02-27)

- Ensure stability of filename cache-keys

## Release notes

### v10.1.1

- Date: 2026-03-09
- Version: v10.1.1
- Original notes: https://github.com/babel/babel-loader/releases/tag/v10.1.1
- Permalink: https://whatsnew.fyi/product/babel-loader/releases/v10.1.1

- **fixed** — Revert use of module.findPackageJSON API

##### What's Changed
* Revert #1055 ("use `module.findPackageJSON` API") by @JLHwung in https://github.com/babel/babel-loader/pull/1066


**Full Changelog**: https://github.com/babel/babel-loader/compare/v10.1.0...v10.1.1

### v10.1.0

- Date: 2026-03-06
- Version: v10.1.0
- Original notes: https://github.com/babel/babel-loader/releases/tag/v10.1.0
- Permalink: https://whatsnew.fyi/product/babel-loader/releases/v10.1.0

- **changed** — Use `module.findPackageJSON` API for package discovery
- **added** — Enable type checking and support Babel 8
- **fixed** — Mark webpack as optional peer dependency

##### What's Changed
* refactor: use `module.findPackageJSON` API by @JLHwung in https://github.com/babel/babel-loader/pull/1055
* Enable type checking and support Babel 8 by @JLHwung in https://github.com/babel/babel-loader/pull/1056
* Bump js-yaml from 4.1.0 to 4.1.1 by @dependabot[bot] in https://github.com/babel/babel-loader/pull/1059
* fix: mark webpack as optional peer dependency by @chenjiahan in https://github.com/babel/babel-loader/pull/1061
* Bump webpack from 5.101.0 to 5.104.1 by @dependabot[bot] in https://github.com/babel/babel-loader/pull/1062
* Bump glob from 10.4.5 to 10.5.0 by @dependabot[bot] in https://github.com/babel/babel-loader/pull/1060
* Bump minimatch from 3.1.2 to 3.1.5 by @dependabot[bot] in https://github.com/babel/babel-loader/pull/1063
* Pin Node.js on CI by @nicolo-ribaudo in https://github.com/babel/babel-loader/pull/1064

##### New Contributors
* @chenjiahan made their first contribution in https://github.com/babel/babel-loader/pull/1061

**Full Changelog**: https://github.com/babel/babel-loader/compare/v10.0.0...v10.1.0

### v10.0.0

- Date: 2025-02-27
- Version: v10.0.0
- Original notes: https://github.com/babel/babel-loader/releases/tag/v10.0.0
- Permalink: https://whatsnew.fyi/product/babel-loader/releases/v10.0.0

- **changed** — Bump Node requirement to ^18.20.0 || ^20.10.0 || >=22.0.0 and webpack requirement to >= 5.61.0
- **changed** — Use output.hashFunction as loader cache hasher
- **added** — Add babel-loader logger
- **added** — Support cache with external dependencies
- **fixed** — Ensure stability of filename cache-keys
- **changed** — Replace find-cache-dir with find-up

##### What's Changed

###### Breaking Changes
* bump node requirement to `^18.20.0 || ^20.10.0 || >=22.0.0` and webpack requirement to `>= 5.61.0` by @JLHwung in https://github.com/babel/babel-loader/pull/1026
* breaking: use output.hashFunction as loader cache hasher by @JLHwung in https://github.com/babel/babel-loader/pull/1027

###### New Features

* Add babel-loader logger by @JLHwung in https://github.com/babel/babel-loader/pull/1034
* Support cache with external dependencies by @JLHwung in https://github.com/babel/babel-loader/pull/1033

###### Bug Fixes
* [Bugfix] Ensure stability of filename cache-keys by @stefanpenner in https://github.com/babel/babel-loader/pull/909

###### Docs
* docs: clarify that `cacheIdentifier` is computed from the merged options by @JLHwung in https://github.com/babel/babel-loader/pull/1000
* Create SECURITY.md by @JLHwung in https://github.com/babel/babel-loader/pull/1032
* Add babel-loader v10 readme by @JLHwung in https://github.com/babel/babel-loader/pull/1046
* add readme section for loggingDebug support by @JLHwung in https://github.com/babel/babel-loader/pull/1038
* Update readme and repo templates by @JLHwung in https://github.com/babel/babel-loader/pull/1041

###### Dependencies

* migrate to c8 by @JLHwung in https://github.com/babel/babel-loader/pull/996
* Bump word-wrap from 1.2.3 to 1.2.4 by @dependabot in https://github.com/babel/babel-loader/pull/998
* Bump dev dependencies by @JLHwung in https://github.com/babel/babel-loader/pull/1001
* Bump braces from 3.0.2 to 3.0.3 by @dependabot in https://github.com/babel/babel-loader/pull/1020
* Update deps by @JLHwung in https://github.com/babel/babel-loader/pull/1025
* refactor: replace `find-cache-dir` by `find-up` by @JLHwung in https://github.com/babel/babel-loader/pull/1031
* Bump webpack from 5.93.0 to 5.94.0 by @dependabot in https://github.com/babel/babel-loader/pull/1035
* chore: update dev deps by @JLHwung in https://github.com/babel/babel-loader/pull/1036
* Bump cross-spawn from 7.0.3 to 7.0.6 by @dependabot in https://github.com/babel/babel-loader/pull/1049

###### Internal
* Remove caller option check by @JLHwung in https://github.com/babel/babel-loader/pull/1007
* Update tests by @JLHwung in https://github.com/babel/babel-loader/pull/1003
* Update metadata test by @JLHwung in https://github.com/babel/babel-loader/pull/1024
* Migrate to node test runner by @JLHwung in https://github.com/babel/babel-loader/pull/1028
* chore: use default eslint rules by @JLHwung in https://github.com/babel/babel-loader/pull/1029
* refactor: use webpack builtin schema util by @JLHwung in https://github.com/babel/babel-loader/pull/1030

##### New Contributors
* @stefanpenner made their first contribution in https://github.com/babel/babel-loader/pull/909

**Full Changelog**: https://github.com/babel/babel-loader/compare/v9.1.3...v10.0.0