eslint.config.mjs

import js from '@eslint/js'
import globals from 'globals'

export default [
  js.configs.recommended,
  {
    languageOptions: {
      ecmaVersion: 2022,
      sourceType: 'module',
      globals: {
        ...globals.node,
        ...globals.mocha,
        fetch: 'readonly',
        AbortController: 'readonly',
        Headers: 'readonly',
        Request: 'readonly',
        Response: 'readonly',
        URL: 'readonly',
        URLSearchParams: 'readonly'
      }
    },
    rules: {
      // StandardJS-like rules
      'no-unused-vars': ['warn', {
        args: 'none',
        caughtErrors: 'none',
        ignoreRestSiblings: true,
        vars: 'all'
      }],
      'no-empty': ['error', { allowEmptyCatch: true }],
      'no-var': 'error',
      'prefer-const': ['error', { destructuring: 'all' }],
      'quote-props': ['error', 'as-needed'],
      semi: ['error', 'never'],
      quotes: ['error', 'single', { avoidEscape: true, allowTemplateLiterals: true }],
      'comma-dangle': ['error', 'never'],
      'space-before-function-paren': ['error', 'always'],
      indent: ['error', 2, {
        SwitchCase: 1,
        VariableDeclarator: 1,
        outerIIFEBody: 1,
        MemberExpression: 1,
        FunctionDeclaration: { parameters: 1, body: 1 },
        FunctionExpression: { parameters: 1, body: 1 },
        CallExpression: { arguments: 1 },
        ArrayExpression: 1,
        ObjectExpression: 1,
        ImportDeclaration: 1,
        flatTernaryExpressions: false,
        ignoreComments: false,
        ignoredNodes: ['TemplateLiteral *', 'JSXElement', 'JSXElement > *', 'JSXAttribute', 'JSXIdentifier', 'JSXNamespacedName', 'JSXMemberExpression', 'JSXSpreadAttribute', 'JSXExpressionContainer', 'JSXOpeningElement', 'JSXClosingElement', 'JSXFragment', 'JSXOpeningFragment', 'JSXClosingFragment', 'JSXText', 'JSXEmptyExpression', 'JSXSpreadChild'],
        offsetTernaryExpressions: true
      }],
      'key-spacing': ['error', { beforeColon: false, afterColon: true }],
      'keyword-spacing': ['error', { before: true, after: true }],
      'object-curly-spacing': ['error', 'always'],
      'array-bracket-spacing': ['error', 'never'],
      'space-in-parens': ['error', 'never'],
      'space-before-blocks': ['error', 'always'],
      'space-infix-ops': 'error',
      'eol-last': 'error',
      'no-multiple-empty-lines': ['error', { max: 1, maxBOF: 0, maxEOF: 0 }],
      'no-trailing-spaces': 'error',
      'comma-spacing': ['error', { before: false, after: true }],
      'no-multi-spaces': 'error',
      'no-mixed-operators': ['error', {
        groups: [
          ['==', '!=', '===', '!==', '>', '>=', '<', '<='],
          ['&&', '||'],
          ['in', 'instanceof']
        ],
        allowSamePrecedence: true
      }],
      'operator-linebreak': ['error', 'after', { overrides: { '?': 'before', ':': 'before', '|>': 'before' } }],
      'brace-style': ['error', '1tbs', { allowSingleLine: true }],
      'arrow-spacing': ['error', { before: true, after: true }],
      'padded-blocks': ['error', { blocks: 'never', switches: 'never', classes: 'never' }],
      'no-use-before-define': ['error', { functions: false, classes: false, variables: false }]
    }
  },
  {
    // Browser files (client-side code)
    files: ['common/**/*.mjs'],
    languageOptions: {
      globals: {
        ...globals.browser,
        solid: 'readonly',
        UI: 'readonly',
        owaspPasswordStrengthTest: 'readonly'
      }
    }
  },
  {
    ignores: [
      'node_modules/**',
      'coverage/**',
      '.db/**',
      'data/**',
      'resources/**'
    ]
  }
]