@stordata/eslint-config/eslint.config.js

Shareable ESLint configuration for Stordata projects

import js from '@eslint/js';
import n from 'eslint-plugin-n';
import noOnlyTests from 'eslint-plugin-no-only-tests';
import stylistic from '@stylistic/eslint-plugin';
import globals from 'globals';
import jsxAccessibility from 'eslint-plugin-jsx-a11y';

export default [
  n.configs['flat/recommended'],
  stylistic.configs.customize({
    semi: true,
    braceStyle: '1tbs',
    commaDangle: 'never',
    quoteProps: 'as-needed'
  }),
  {
    files: [
      '**/*.?(c|m){j,t}s?(x)'
    ],
    plugins: {
      js,
      '@stylistic': stylistic
    },
    rules: {
      ...js.configs.recommended.rules,
      // Stuff we cherry-picked from Airbnb style guide
      '@stylistic/multiline-ternary': 'off',
      '@stylistic/no-confusing-arrow': ['error', { allowParens: true }],
      '@stylistic/no-extra-parens': ['error', 'all', {
        ignoreJSX: 'all',
        nestedBinaryExpressions: false,
        ignoredNodes: ['ArrowFunctionExpression[body.type=ConditionalExpression]']
      }],
      '@stylistic/operator-linebreak': 'off',
      '@stylistic/quotes': ['error', 'single', { avoidEscape: true }],
      eqeqeq: 'error',
      'guard-for-in': 'error',
      'no-alert': 'error',
      'no-console': 'warn',
      'no-else-return': ['error', { allowElseIf: false }],
      'no-eval': 'error',
      'no-extend-native': 'error',
      'no-extra-bind': 'error',
      'no-floating-decimal': 'error',
      'no-implied-eval': 'error',
      'no-lone-blocks': 'error',
      'no-param-reassign': ['error', {
        props: true,
        ignorePropertyModificationsFor: [
          'acc', // for reduce accumulators
          'accumulator', // for reduce accumulators
          'req', // for Express requests
          'res', // for Express responses
          'instance' // For sequelize instances (in hooks for instance)
        ]
      }],
      'no-return-assign': 'error',
      'no-var': 'error',
      'object-shorthand': ['error', 'always', { ignoreConstructors: false, avoidQuotes: true }],
      'one-var-declaration-per-line': ['error', 'always'],
      'prefer-const': ['error', { destructuring: 'any' }],
      'prefer-template': 'error',
      yoda: 'error',
      // Stordata overrides
      '@stylistic/indent': ['error', 2, {
        VariableDeclarator: {
          let: 2,
          const: 3
        },
        SwitchCase: 1
      }],
      '@stylistic/jsx-one-expression-per-line': 'off',
      '@stylistic/jsx-curly-brace-presence': ['error', { props: 'always', children: 'ignore', propElementValues: 'always' }],
      '@stylistic/padding-line-between-statements': [
        'error',
        { blankLine: 'always', prev: '*', next: 'return' }, // newline-before-return
        { blankLine: 'always', prev: ['const', 'let', 'var'], next: '*' } // newline-after-var
      ],
      '@stylistic/padded-blocks': 'off',
      '@stylistic/space-before-function-paren': ['error', {
        anonymous: 'never',
        named: 'never',
        asyncArrow: 'never',
        catch: 'always'
      }],
      'n/no-process-exit': 'off',
      'no-unused-vars': ['error', { argsIgnorePattern: 'next' }],
      'one-var': ['error', 'consecutive'],
      strict: ['error', 'safe'],
      // Not sure about these
      // They come from n/flat/recommended config, but there are lots of errors for packages that _apparently_ are published
      'n/no-unpublished-import': 'off',
      'n/no-unpublished-require': 'off'
    }
  },
  {
    files: [
      '**/*.{j,t}sx'
    ],
    languageOptions: {
      parserOptions: {
        ecmaFeatures: {
          jsx: true
        }
      }
    },
    plugins: {
      'jsx-a11y': jsxAccessibility
    },
    rules: {
      // Picked from eslint-config-react-app (CRA)
      'jsx-a11y/alt-text': 'warn',
      'jsx-a11y/anchor-has-content': 'warn',
      'jsx-a11y/anchor-is-valid': ['warn', { aspects: ['noHref', 'invalidHref'] }],
      'jsx-a11y/aria-activedescendant-has-tabindex': 'warn',
      'jsx-a11y/aria-props': 'warn',
      'jsx-a11y/aria-proptypes': 'warn',
      'jsx-a11y/aria-role': ['warn', { ignoreNonDOM: true }],
      'jsx-a11y/aria-unsupported-elements': 'warn',
      'jsx-a11y/heading-has-content': 'warn',
      'jsx-a11y/iframe-has-title': 'warn',
      'jsx-a11y/img-redundant-alt': 'warn',
      'jsx-a11y/no-access-key': 'warn',
      'jsx-a11y/no-distracting-elements': 'warn',
      'jsx-a11y/no-redundant-roles': 'warn',
      'jsx-a11y/role-has-required-aria-props': 'warn',
      'jsx-a11y/role-supports-aria-props': 'warn',
      'jsx-a11y/scope': 'warn'
    }
  },
  {
    files: [
      '**/*.test.?(c|m){j,t}s?(x)',
      '**/*.spec.?(c|m){j,t}s?(x)',
      '**/setupTests?(.*).{j,t}s?(x)'
    ],
    plugins: {
      'no-only-tests': noOnlyTests
    },
    languageOptions: {
      globals: {
        ...globals.mocha,
        ...globals.vitest
      }
    },
    rules: {
      'no-only-tests/no-only-tests': 'error'
    }
  },
  {
    files: [
      '**/*.c{j,t}s?(x)'
    ],
    languageOptions: {
      sourceType: 'commonjs'
    }
  },
  {
    files: [
      '**/*.m{j,t}s?(x)'
    ],
    languageOptions: {
      sourceType: 'module'
    }
  }
];