.eslintrc.cjs

module.exports = {
  settings: {
    react: {
      version: '19.0',
      flowVersion: '0.336.0'
    }
  },
  // hermes parser to support Flow syntax
  parser: 'hermes-eslint',
  parserOptions: {
    sourceType: 'module'
  },
  extends: ['prettier'],
  plugins: ['react', 'react-hooks'],
  env: {
    browser: true,
    es2021: true,
    jest: true,
    node: true
  },
  ignorePatterns: [
    'coverage',
    'dist',
    'flow-typed',
    'node_modules',
    'packages/**/vendor/*',
    'packages/**/.next'
  ],
  // Flow built-in types
  globals: {
    ClientRect: 'readonly',
    Readonly: 'readonly',
    ReadonlyArray: 'readonly'
  },
  rules: {
    camelcase: 'off',
    'constructor-super': 'error',
    'default-case': ['error', { commentPattern: '^no default$' }],
    eqeqeq: ['error', 'allow-null'],
    'handle-callback-err': ['error', '^(err|error)$'],
    'new-cap': ['error', { newIsCap: true, capIsNew: false }],
    'no-alert': 'warn',
    'no-array-constructor': 'error',
    'no-caller': 'error',
    'no-case-declarations': 'error',
    'no-class-assign': 'error',
    'no-cond-assign': 'error',
    'no-const-assign': 'error',
    'no-control-regex': 'error',
    'no-debugger': 'error',
    'no-delete-var': 'error',
    'no-dupe-args': 'error',
    'no-dupe-class-members': 'error',
    'no-dupe-keys': 'error',
    'no-duplicate-case': 'error',
    'no-empty-character-class': 'error',
    'no-empty-pattern': 'error',
    'no-eval': 'error',
    'no-ex-assign': 'error',
    'no-extend-native': 'error',
    'no-extra-bind': 'error',
    'no-extra-boolean-cast': 'error',
    'no-fallthrough': 'error',
    'no-floating-decimal': 'error',
    'no-func-assign': 'error',
    'no-implied-eval': 'error',
    'no-inner-declarations': ['error', 'functions'],
    'no-invalid-regexp': 'error',
    'no-irregular-whitespace': 'error',
    'no-iterator': 'error',
    'no-label-var': 'error',
    'no-labels': ['error', { allowLoop: false, allowSwitch: false }],
    'no-lone-blocks': 'error',
    'no-loop-func': 'error',
    'no-multi-str': 'error',
    'no-native-reassign': 'error',
    'no-negated-in-lhs': 'error',
    'no-new': 'error',
    'no-new-func': 'error',
    'no-new-object': 'error',
    'no-new-require': 'error',
    'no-new-symbol': 'error',
    'no-new-wrappers': 'error',
    'no-obj-calls': 'error',
    'no-octal': 'error',
    'no-octal-escape': 'error',
    'no-path-concat': 'error',
    'no-proto': 'error',
    'no-redeclare': 'error',
    'no-regex-spaces': 'error',
    'no-return-assign': ['error', 'except-parens'],
    'no-script-url': 'error',
    'no-self-assign': 'error',
    'no-self-compare': 'error',
    'no-sequences': 'error',
    'no-shadow-restricted-names': 'error',
    'no-sparse-arrays': 'error',
    'no-this-before-super': 'error',
    'no-throw-literal': 'error',
    'no-undef': 'error',
    'no-undef-init': 'error',
    'no-unexpected-multiline': 'error',
    'no-unmodified-loop-condition': 'error',
    'no-unneeded-ternary': ['error', { defaultAssignment: false }],
    'no-unreachable': 'error',
    'no-unsafe-finally': 'error',
    'no-unused-vars': ['error', { vars: 'all', args: 'none' }],
    'no-useless-call': 'error',
    'no-useless-computed-key': 'error',
    'no-useless-concat': 'error',
    'no-useless-constructor': 'error',
    'no-useless-escape': 'error',
    'no-var': 'error',
    'no-with': 'error',
    'prefer-const': 'error',
    'prefer-rest-params': 'error',
    quotes: [
      'error',
      'single',
      { avoidEscape: true, allowTemplateLiterals: true }
    ],
    radix: 'error',
    'use-isnan': 'error',
    'valid-typeof': 'error',
    yoda: ['error', 'never'],

    // react
    'react/display-name': 'off',
    'react/jsx-no-bind': 'off',
    'react/jsx-no-duplicate-props': 'error',
    'react/jsx-no-undef': 'error',
    'react/jsx-pascal-case': 'error',
    'react/jsx-sort-props': 'error',
    'react/jsx-uses-react': 'error',
    'react/jsx-uses-vars': 'error',
    'react/no-did-mount-set-state': 'off',
    'react/no-did-update-set-state': 'error',
    'react/no-direct-mutation-state': 'error',
    'react/no-multi-comp': 'off',
    'react/no-string-refs': 'error',
    'react/no-unknown-property': 'error',
    'react/prefer-es6-class': 'error',
    'react/prop-types': 'off',
    'react/react-in-jsx-scope': 'off',
    'react/self-closing-comp': 'error',
    'react/sort-comp': 'off',
    'react/sort-prop-types': 'error',
    'react/wrap-multilines': 'off',

    // react-hooks
    'react-hooks/rules-of-hooks': 'error',
    'react-hooks/exhaustive-deps': 'warn'
  }
};