webpack: changelog & breaking changes

Auto-tracked from github.com/webpack/webpack. Updated Jun 28, 2026.

v5.108.1

2026-06-26

No breaking-change keywords detected in release notes.

2026-06-25

⚠ Potential breaking changes

CommonJS tree-shaking no longer drops exports accessed before a deferred require binding. (by [@xiaoxiaojx](https://github.com/xiaoxiaojx) in [#21123](https://github.com/webpack/webpack/pull/21123))

2026-05-25

⚠ Potential breaking changes

Remove unnecessary `__webpack_require__` runtime helpers in ESM library output with multi-module chunks. (by [@xiaoxiaojx](https://github.com/xiaoxiaojx) in [#21032](https://github.com/webpack/webpack/pull/21032))

2026-05-21

No breaking-change keywords detected in release notes.

2026-05-20

⚠ Potential breaking changes

Remove outdated `@types/eslint-scope` package from dependencies. (by [@alexander-akait](https://github.com/alexander-akait) in [#20869](https://github.com/webpack/webpack/pull/20869))

2026-04-15

⚠ Potential breaking changes

Migrate from `mime-types` to `mime-db`. (by [@alexander-akait](https://github.com/alexander-akait) in [#20812](https://github.com/webpack/webpack/pull/20812))

2026-04-10

⚠ Potential breaking changes

Prevent `!important` from being renamed as a local identifier in CSS modules. (by [@xiaoxiaojx](https://github.com/xiaoxiaojx) in [#20798](https://github.com/webpack/webpack/pull/20798))

2026-04-08

⚠ Potential breaking changes

All deprecated methods and options now have `@deprecated` flag in types. (by [@alexander-akait](https://github.com/alexander-akait) in [#20707](https://github.com/webpack/webpack/pull/20707))