v1.0.0

Breaking

• Requires ESLint flat config
• Requires Node.js 20.17
• Configuration now only through package.json and xo.config.{js,cjs,mjs,ts,cts,mts} files
• Switched from eslint-plugin-import to eslint-plugin-import-x (since it's better maintained)
  • You will have to update ignore comments and config from import to import-x
• CLI flags removed:
  • --plugin: Configurable via config file
  • --extend: Configurable via config file
  • --global: Configurable via config file
  • --extension: Configurable via config file
  • --env: No longer relevant with new config system
  • --node-version: Removed as it only affected unsupported Node.js versions
  • --reporter: Removed due to potential lookup reliability issues
• Node.js engines check removed
  • Was only active in unsupported Node.js versions
• Webpack lookup and import resolution removed
  • Considered too niche for core functionality

Improvements

• React support
• Prettier compatibility mode with {prettier: 'compat'} option
  • Disables all Prettier-affected stylistic rules, and maintains existing Prettier functionality otherwise
• Enhanced stdin handling:
  • --stdin-filename now optional
  • Supports TypeScript files via stdin

New rules

• @typescript-eslint/no-wrapper-object-types
• @typescript-eslint/no-unsafe-function-type
• @typescript-eslint/no-deprecated
• @stylistic/type-named-tuple-spacing
• @stylistic/type-generic-spacing
• unicorn/consistent-date-clone
• unicorn/no-named-default
• unicorn/consistent-assert
• unicorn/no-instanceof-builtins
• unicorn/no-accessor-recursion
• unicorn/prefer-import-meta-properties
• unicorn/no-unnecessary-array-flat-depth
• unicorn/no-unnecessary-array-splice-count

Thanks

Huge thanks to @spence-s for doing most of the work for this 🎉

---

v0.60.0...v1.0.0

v0.61.0-2

• Remove need for xoToEslintConfig to be async (#790) 5866a17
• Fix: Ensure Prettier rules are applied last (#789) 35b8320

---

v0.61.0-1...v0.61.0-2

v0.61.0-1

• Fix types not being included in the package (#780) b181386

More here

---

v0.61.0-0...v0.61.0-1

v0.61.0-0

Help us test this pre-release 🙏

Breaking

• Requires Node.js 18.20
• Requires ESLint flat config
• Configuration now only through package.json and xo.config.{js,cjs,mjs,ts,cts,mts} files
• Switched from eslint-plugin-import to eslint-plugin-import-x (since it's better maintained)
  • You will have to update ignore comments and config from import to import-x
• CLI flags removed:
  • --plugin: Configurable via config file
  • --extend: Configurable via config file
  • --global: Configurable via config file
  • --extension: Configurable via config file
  • --env: No longer relevant with new config system
  • --node-version: Removed as it only affected unsupported Node.js versions
  • --reporter: Removed due to potential lookup reliability issues
• Node.js engines check removed
  • Was only active in unsupported Node.js versions
• Webpack lookup and import resolution removed
  • Considered too niche for core functionality

Improvements

• React support
• Prettier compatibility mode with {prettier: 'compat'} option
  • Disables all Prettier-affected stylistic rules, and maintains existing Prettier functionality otherwise
• Enhanced stdin handling:
  • --stdin-filename now optional
  • Supports TypeScript files via stdin

New rules

• @typescript-eslint/no-wrapper-object-types
• @typescript-eslint/no-unsafe-function-type
• @typescript-eslint/no-deprecated
• @stylistic/type-named-tuple-spacing
• @stylistic/type-generic-spacing
• unicorn/consistent-date-clone
• unicorn/no-named-default
• unicorn/consistent-assert
• unicorn/no-instanceof-builtins
• unicorn/no-accessor-recursion

Thanks

Huge thanks to @spence-s for doing most of the work for this 🎉

---

v0.60.0...v0.61.0-0

v0.60.0

New rules

• unicorn/no-length-as-slice-end
• unicorn/prefer-global-this
• unicorn/prefer-math-min-max
• unicorn/consistent-existence-index-check

Improvements

• Update dependencies 0c2be9c

---

v0.59.3...v0.60.0

v0.59.3

• Allow using experimental Node.js features 3eb8436
• Fix TypeScript extension support (#764) 46a91e0

v0.59.2...v0.59.3

v0.59.2

• Respect nodeVersion: false option (#762) c965843

v0.59.1...v0.59.2

v0.59.1

• Fix XO to not override rules from user's config (#761) 9cdab84

v0.59.0...v0.59.1

v0.59.0

New rules

• unicorn/no-single-promise-in-promise-methods
• unicorn/no-await-in-promise-methods
• unicorn/no-anonymous-default-export
• unicorn/consistent-empty-array-spread
• unicorn/no-invalid-fetch-options
• unicorn/no-magic-array-flat-depth
• unicorn/prefer-structured-clone
• unicorn/no-negation-in-equality-check
• @typescript-eslint/no-unnecessary-parameter-property-assignment
• @typescript-eslint/use-unknown-in-catch-callback-variable

Breaking

• Re-enable eslint-plugin-promise (#656) b168f08

---

v0.58.0...v0.59.0

v0.58.0

• TypeScript: Disable default-case rule to avoid conflict with stricter @typescript-eslint/switch-exhaustiveness-check rule

v0.57.0...v0.58.0