RFC: ESLint 9 Migration – Transitioning from JSON Config to config.js

[gkbishnoi07]

Description

Summary

This RFC proposes migrating the ESLint configuration from the deprecated .eslintrc.* format to the new eslint.config.js format introduced in ESLint 9. Additionally, it outlines handling the removal of .eslintignore in favor of the ignores property inside the configuration file.

Expected Outcomes

• Successful Migration to eslint.config.js – Ensures compatibility with ESLint 9.
• Removal of Deprecated Configurations – .eslintrc.* and .eslintignore are replaced with eslint.config.js.
• Consistent and Maintainable Linting Rules – The same linting standards are preserved.

Related Issues

No response

Questions

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Other

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Checklist

• I have read and understood the Code of Conduct.
• Searched for existing issues and pull requests.
• The issue name begins with RFC:.

[stdlib-bot]

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[gkbishnoi07]

@kgryte @Planeshifter, could you please assign this issue to me? I would love to work on it!

[kgryte]

We don't assign issues, but are happy to accept a PR.

[gkbishnoi07]

We don't assign issues, but are happy to accept a PR.

Got it! Working on it

[sahilk45]

Hey @kgryte,
I have created eslint.config.js file and working for changes according to .eslintrc.*
But I'm not sure how to properly migrate the existing configuration to match the project's coding standards and linting requirements.
Also, Whether I should maintain the current ESLint version or migrate to v9.
Could you please provide guidance on this.

Thank you for help!
SAHIL KUMAR

[gkbishnoi07]

Hey @sahilk45, I'm already working on it. I've migrated the basic things and am working on the remaining parts. I'll migrate ESLint to v9 soon and raise the PR shortly.