module.exports = { root: true, extends: [ 'eslint:recommended', 'plugin:react/recommended', 'plugin:react-hooks/recommended', 'plugin:jsx-a11y/recommended', 'plugin:import/recommended', 'plugin:promise/recommended', 'plugin:jsdoc/recommended', 'plugin:prettier/recommended', ], env: { browser: true, node: true, es6: true, }, globals: { ATTACHMENT_HOST: false, }, parser: '@typescript-eslint/parser', plugins: [ 'react', 'jsx-a11y', 'import', 'promise', '@typescript-eslint', 'formatjs', ], parserOptions: { sourceType: 'module', ecmaFeatures: { jsx: true, }, ecmaVersion: 2021, requireConfigFile: false, babelOptions: { configFile: false, presets: ['@babel/react', '@babel/env'], }, }, settings: { react: { version: 'detect', }, 'import/ignore': [ 'node_modules', '\\.(css|scss|json)$', ], 'import/resolver': { typescript: {}, }, }, rules: { 'consistent-return': 'error', 'dot-notation': 'error', eqeqeq: ['error', 'always', { 'null': 'ignore' }], 'jsx-quotes': ['error', 'prefer-single'], 'no-case-declarations': 'off', 'no-catch-shadow': 'error', 'no-console': [ 'warn', { allow: [ 'error', 'warn', ], }, ], 'no-empty': 'off', 'no-restricted-properties': [ 'error', { property: 'substring', message: 'Use .slice instead of .substring.' }, { property: 'substr', message: 'Use .slice instead of .substr.' }, ], 'no-restricted-syntax': [ 'error', { // eslint-disable-next-line no-restricted-syntax selector: 'Literal[value=/•/], JSXText[value=/•/]', // eslint-disable-next-line no-restricted-syntax message: "Use '·' (middle dot) instead of '•' (bullet)", }, ], 'no-self-assign': 'off', 'no-unused-expressions': 'error', 'no-unused-vars': 'off', '@typescript-eslint/no-unused-vars': [ 'error', { vars: 'all', args: 'after-used', destructuredArrayIgnorePattern: '^_', ignoreRestSiblings: true, }, ], 'valid-typeof': 'error', 'react/jsx-filename-extension': ['error', { extensions: ['.jsx', 'tsx'] }], 'react/jsx-boolean-value': 'error', 'react/display-name': 'off', 'react/jsx-fragments': ['error', 'syntax'], 'react/jsx-equals-spacing': 'error', 'react/jsx-no-bind': 'error', 'react/jsx-no-useless-fragment': 'error', 'react/jsx-no-target-blank': 'off', 'react/jsx-tag-spacing': 'error', 'react/jsx-uses-react': 'off', // not needed with new JSX transform 'react/jsx-wrap-multilines': 'error', 'react/no-deprecated': 'off', 'react/no-unknown-property': 'off', 'react/react-in-jsx-scope': 'off', // not needed with new JSX transform 'react/self-closing-comp': 'error', // recommended values found in https://github.com/jsx-eslint/eslint-plugin-jsx-a11y/blob/main/src/index.js 'jsx-a11y/accessible-emoji': 'warn', 'jsx-a11y/click-events-have-key-events': 'off', 'jsx-a11y/label-has-associated-control': 'off', 'jsx-a11y/media-has-caption': 'off', 'jsx-a11y/no-autofocus': 'off', // recommended rule is: // 'jsx-a11y/no-interactive-element-to-noninteractive-role': [ // 'error', // { // tr: ['none', 'presentation'], // canvas: ['img'], // }, // ], 'jsx-a11y/no-interactive-element-to-noninteractive-role': 'off', // recommended rule is: // 'jsx-a11y/no-noninteractive-element-interactions': [ // 'error', // { // body: ['onError', 'onLoad'], // iframe: ['onError', 'onLoad'], // img: ['onError', 'onLoad'], // }, // ], 'jsx-a11y/no-noninteractive-element-interactions': [ 'warn', { handlers: [ 'onClick', ], }, ], // recommended rule is: // 'jsx-a11y/no-noninteractive-tabindex': [ // 'error', // { // tags: [], // roles: ['tabpanel'], // allowExpressionValues: true, // }, // ], 'jsx-a11y/no-noninteractive-tabindex': 'off', 'jsx-a11y/no-onchange': 'warn', // recommended is full 'error' 'jsx-a11y/no-static-element-interactions': [ 'warn', { handlers: [ 'onClick', ], }, ], // See https://github.com/import-js/eslint-plugin-import/blob/main/config/recommended.js 'import/extensions': [ 'error', 'always', { js: 'never', jsx: 'never', mjs: 'never', ts: 'never', tsx: 'never', }, ], 'import/first': 'error', 'import/newline-after-import': 'error', 'import/no-anonymous-default-export': 'error', 'import/no-extraneous-dependencies': [ 'error', { devDependencies: [ 'config/webpack/**', 'app/javascript/mastodon/performance.js', 'app/javascript/mastodon/test_setup.js', 'app/javascript/**/__tests__/**', ], }, ], 'import/no-amd': 'error', 'import/no-commonjs': 'error', 'import/no-import-module-exports': 'error', 'import/no-relative-packages': 'error', 'import/no-self-import': 'error', 'import/no-useless-path-segments': 'error', 'import/no-webpack-loader-syntax': 'error', 'import/order': [ 'error', { alphabetize: { order: 'asc' }, 'newlines-between': 'always', groups: [ 'builtin', 'external', 'internal', 'parent', ['index', 'sibling'], 'object', ], pathGroups: [ // React core packages { pattern: '{react,react-dom,react-dom/client,prop-types}', group: 'builtin', position: 'after', }, // I18n { pattern: '{react-intl,intl-messageformat}', group: 'builtin', position: 'after', }, // Common React utilities { pattern: '{classnames,react-helmet,react-router-dom}', group: 'external', position: 'before', }, // Immutable / Redux / data store { pattern: '{immutable,react-redux,react-immutable-proptypes,react-immutable-pure-component,reselect}', group: 'external', position: 'before', }, // Internal packages { pattern: '{mastodon/**,flavours/glitch-soc/**}', group: 'internal', position: 'after', }, ], pathGroupsExcludedImportTypes: [], }, ], 'promise/always-return': 'off', 'promise/catch-or-return': [ 'error', { allowFinally: true, }, ], 'promise/no-callback-in-promise': 'off', 'promise/no-nesting': 'off', 'promise/no-promise-in-callback': 'off', 'formatjs/blocklist-elements': 'error', 'formatjs/enforce-default-message': ['error', 'literal'], 'formatjs/enforce-description': 'off', // description values not currently used 'formatjs/enforce-id': 'off', // Explicit IDs are used in the project 'formatjs/enforce-placeholders': 'off', // Issues in short_number.jsx 'formatjs/enforce-plural-rules': 'error', 'formatjs/no-camel-case': 'off', // disabledAccount is only non-conforming 'formatjs/no-complex-selectors': 'error', 'formatjs/no-emoji': 'error', 'formatjs/no-id': 'off', // IDs are used for translation keys 'formatjs/no-invalid-icu': 'error', 'formatjs/no-literal-string-in-jsx': 'off', // Should be looked at, but mainly flagging punctuation outside of strings 'formatjs/no-multiple-plurals': 'off', // Only used by hashtag.jsx 'formatjs/no-multiple-whitespaces': 'error', 'formatjs/no-offset': 'error', 'formatjs/no-useless-message': 'error', 'formatjs/prefer-formatted-message': 'error', 'formatjs/prefer-pound-in-plural': 'error', 'jsdoc/check-types': 'off', 'jsdoc/no-undefined-types': 'off', 'jsdoc/require-jsdoc': 'off', 'jsdoc/require-param-description': 'off', 'jsdoc/require-property-description': 'off', 'jsdoc/require-returns-description': 'off', 'jsdoc/require-returns': 'off', }, overrides: [ { files: [ '*.config.js', '.*rc.js', 'ide-helper.js', 'config/webpack/**/*', 'config/formatjs-formatter.js', ], env: { commonjs: true, }, parserOptions: { sourceType: 'script', }, rules: { 'import/no-commonjs': 'off', }, }, { files: [ '**/*.ts', '**/*.tsx', ], extends: [ 'eslint:recommended', 'plugin:@typescript-eslint/recommended', 'plugin:@typescript-eslint/recommended-requiring-type-checking', 'plugin:react/recommended', 'plugin:react-hooks/recommended', 'plugin:jsx-a11y/recommended', 'plugin:import/recommended', 'plugin:import/typescript', 'plugin:promise/recommended', 'plugin:jsdoc/recommended-typescript', 'plugin:prettier/recommended', ], parserOptions: { project: './tsconfig.json', tsconfigRootDir: __dirname, }, rules: { 'import/consistent-type-specifier-style': ['error', 'prefer-top-level'], '@typescript-eslint/consistent-type-definitions': ['warn', 'interface'], '@typescript-eslint/consistent-type-exports': 'error', '@typescript-eslint/consistent-type-imports': 'error', 'jsdoc/require-jsdoc': 'off', // Those rules set stricter rules for TS files // to enforce better practices when converting from JS 'import/no-default-export': 'warn', 'react/prefer-stateless-function': 'warn', 'react/function-component-definition': ['error', { namedComponents: 'arrow-function' }], 'react/jsx-uses-react': 'off', // not needed with new JSX transform 'react/react-in-jsx-scope': 'off', // not needed with new JSX transform 'react/prop-types': 'off', }, }, { files: [ '**/__tests__/*.js', '**/__tests__/*.jsx', ], env: { jest: true, }, }, { files: [ 'streaming/**/*', ], rules: { 'import/no-commonjs': 'off', }, }, ], };