refactor(types): Expose ChunkGroup to type definitions

[TheLarkInn]

Summary

🤖 Generated by Copilot at 53eccc3

Add type definition for ChunkGroup class in lib/index.js. This improves code quality and readability.

Details

🤖 Generated by Copilot at 53eccc3

• Add type definition for ChunkGroup class (link) to improve code documentation and type checking

[webpack-bot]

For maintainers only:

• This needs to be documented (issue in webpack/webpack.js.org will be filed when merged)
• This needs to be backported to webpack 4 (issue will be created when merged)

[alexander-akait]

Just want to say you can get some options using:

Compilation["chunkGroups"][0]

Not pretty, but allow to solve most of edge cases

[TheLarkInn]

Just want to say you can get some options using:

Compilation["chunkGroups"][0]

Not pretty, but allow to solve most of edge cases

Yup absolutely. Today I'm solving it contextually with:

          /**
           * TODO: For now we are going to extract the `ChunkGroup` type from the compilation
           * but once this pull request (https://github.com/webpack/webpack/pull/17201) lands,
           * then we can remove this and instead import the `ChunkGroup` type from webpack.
           */
          type ChunkGroup = ReturnType<typeof compilation.addChunkInGroup>;

[TheLarkInn]

Ideally though if it is a type used as an argument/parameter somewhere in a "public API", its own type should be exposed.