eslint.config.js

import js from '@eslint/js';
import eslintConfigPrettier from 'eslint-config-prettier/flat';
import globals from './globals.js';

export default [
  js.configs.recommended,
  eslintConfigPrettier,
  {
    languageOptions: {
      ecmaVersion: 2025,
      sourceType: 'module',
      globals: { ...globals },
    },
    ignores: ['app/assets/config/manifest.js'],
    rules: {
      indent: 'off',
      'comma-dangle': [
        'error',
        {
          arrays: 'always-multiline',
          objects: 'always-multiline',
          imports: 'always-multiline',
          exports: 'only-multiline',
          functions: 'never',
        },
      ],
      quotes: [
        'error',
        'single',
        { avoidEscape: true, allowTemplateLiterals: true },
      ],
      semi: ['error', 'always'],
      'no-trailing-spaces': 'error',
      'no-duplicate-imports': 'error',
      'no-useless-computed-key': 'error',
      'rest-spread-spacing': ['error', 'never'],
      'no-console': 'off',
      eqeqeq: ['error', 'smart'],
      'brace-style': ['error', '1tbs', { allowSingleLine: true }],
      curly: 'off',
      'object-shorthand': ['warn', 'always'],
      'key-spacing': [
        'error',
        { beforeColon: false, afterColon: true, mode: 'strict' },
      ],
      camelcase: ['warn', { properties: 'always' }],
      'dot-location': ['error', 'property'],
      'generator-star-spacing': ['off'],
      'block-spacing': ['error', 'always'],
      'comma-style': ['error', 'last'],
      'comma-spacing': ['error', { before: false, after: true }],
      'no-extend-native': 'error',
      'no-loop-func': 'error',
      'no-implied-eval': 'error',
      'no-iterator': 'error',
      'no-label-var': 'error',
      'no-multi-str': 'error',
      'no-script-url': 'error',
      'no-shadow-restricted-names': 'error',
      'no-spaced-func': 'error',
      'no-sparse-arrays': 'warn',
      'no-fallthrough': 'warn',
      'no-caller': 'error',
      'no-eval': 'error',
      'no-multiple-empty-lines': ['error', { max: 2, maxEOF: 1 }],
      'no-multi-spaces': ['error', { ignoreEOLComments: true }],
      'no-negated-in-lhs': 'error',
      'no-new': 'error',
      'no-new-require': 'error',
      'block-scoped-var': 'error',
      'no-use-before-define': 'warn',
      'no-proto': 'error',
      complexity: ['warn', 50],
      'wrap-iife': ['error', 'outside'],
      'new-parens': 'error',
      'space-infix-ops': 'error',
      'eol-last': ['error', 'always'],
      'space-unary-ops': 'error',
      'arrow-parens': ['error', 'as-needed'],
      'arrow-spacing': 'error',
      'space-before-blocks': ['error', 'always'],
      yoda: ['error', 'never'],
      'space-before-function-paren': 'off',
      'spaced-comment': ['error', 'always'],
      'no-useless-assignment': 'error',
    },
  },
];