nvenv/eslint.config.mjs

Python venv-like Node.js environment manager - project-local Node.js installation without global environment pollution

import stylistic from '@stylistic/eslint-plugin';

export default [
  {
    ignores: [
      'node_modules/**',
      'test/.test-*/**',
      'test/**/.test-*/**',
      '**/coverage/**'
    ]
  },
  {
    files: ['**/*.js'],
    plugins: {
      '@stylistic': stylistic
    },
    languageOptions: {
      ecmaVersion: 2022,
      sourceType: 'commonjs',
      globals: {
        console: 'readonly',
        process: 'readonly',
        require: 'readonly',
        module: 'readonly',
        __dirname: 'readonly',
        __filename: 'readonly',
        exports: 'readonly',
        Buffer: 'readonly'
      }
    },
    rules: {
      // Core ESLint rules
      'no-unused-vars': ['error', {
        argsIgnorePattern: '^_',
        varsIgnorePattern: '^_'
      }],
      'no-undef': 'error',
      'no-console': 'off',
      'prefer-const': 'error',
      'no-var': 'error',
      'eqeqeq': ['error', 'always', { null: 'ignore' }],
      'curly': ['error', 'all'],
      'no-throw-literal': 'error',
      'prefer-promise-reject-errors': 'error',

      // Stylistic rules
      '@stylistic/indent': ['error', 2, { SwitchCase: 1 }],
      '@stylistic/quotes': ['error', 'single', { avoidEscape: true }],
      '@stylistic/semi': ['error', 'always'],
      '@stylistic/comma-dangle': ['error', 'never'],
      '@stylistic/comma-spacing': ['error', { before: false, after: true }],
      '@stylistic/keyword-spacing': ['error', { before: true, after: true }],
      '@stylistic/space-before-blocks': ['error', 'always'],
      '@stylistic/space-before-function-paren': ['error', {
        anonymous: 'always',
        named: 'never',
        asyncArrow: 'always'
      }],
      '@stylistic/object-curly-spacing': ['error', 'always'],
      '@stylistic/array-bracket-spacing': ['error', 'never'],
      '@stylistic/brace-style': ['error', '1tbs', { allowSingleLine: true }],
      '@stylistic/no-trailing-spaces': 'error',
      '@stylistic/eol-last': ['error', 'always'],
      '@stylistic/no-multiple-empty-lines': ['error', { max: 1, maxEOF: 0, maxBOF: 0 }],
      '@stylistic/arrow-spacing': ['error', { before: true, after: true }],
      '@stylistic/key-spacing': ['error', { beforeColon: false, afterColon: true }]
    }
  }
];