es-toolkit/.eslintrc.js

module.exports = {
  root: true,

  env: {
    es6: true,
    node: true,
    browser: true,
    jest: true,
    'shared-node-browser': true,
  },

  parser: '@typescript-eslint/parser',
  parserOptions: {
    ecmaFeatures: { jsx: true },
  },

  extends: ['eslint:recommended', 'plugin:@typescript-eslint/recommended', 'prettier'],
  plugins: ['@typescript-eslint'],
  rules: {
    'no-implicit-coercion': 'error',
    'no-warning-comments': [
      'warn',
      {
        terms: ['TODO', 'FIXME', 'XXX', 'BUG'],
        location: 'anywhere',
      },
    ],
    curly: ['error', 'all'],
    eqeqeq: ['error', 'always', { null: 'ignore' }],

    '@typescript-eslint/no-explicit-any': 'warn',
    '@typescript-eslint/no-use-before-define': 'off',
    '@typescript-eslint/no-empty-interface': 'off',
    '@typescript-eslint/explicit-function-return-type': 'off',
    '@typescript-eslint/no-parameter-properties': 'off',
    '@typescript-eslint/no-var-requires': 'warn',
    '@typescript-eslint/no-non-null-asserted-optional-chain': 'warn',
    '@typescript-eslint/no-inferrable-types': 'warn',
    '@typescript-eslint/no-empty-function': 'off',
    '@typescript-eslint/naming-convention': [
      'error',
      { format: ['camelCase', 'UPPER_CASE', 'PascalCase'], selector: 'variable', leadingUnderscore: 'allow' },
      { format: ['camelCase', 'PascalCase'], selector: 'function' },
      { format: ['PascalCase'], selector: 'interface' },
      { format: ['PascalCase'], selector: 'typeAlias' },
    ],
    '@typescript-eslint/explicit-module-boundary-types': 'off',
    '@typescript-eslint/array-type': ['error', { default: 'array-simple' }],
    '@typescript-eslint/no-unused-vars': ['error', { ignoreRestSiblings: true }],
    '@typescript-eslint/member-ordering': [
      'error',
      {
        default: [
          'public-static-field',
          'private-static-field',
          'public-instance-field',
          'private-instance-field',
          'public-constructor',
          'private-constructor',
          'public-instance-method',
          'private-instance-method',
        ],
      },
    ],
  },
};