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import eslintJs from '@eslint/js'

import pluginVue from 'eslint-plugin-vue'

import pluginHtml from 'eslint-plugin-html'

import pluginI18nJson from 'eslint-plugin-i18n-json'

import pluginJsonc from 'eslint-plugin-jsonc'

import neostandard, { plugins as neostandardPlugins } from 'neostandard'

import babelParser from '@babel/eslint-parser'

import tseslint from 'typescript-eslint'

import vueParser from 'vue-eslint-parser'

import globals from 'globals'

const { configs: js } = eslintJs

export default [

// 0. Global ignores (must be first)

{

ignores: [

'.claude/**',

'**/out/**',

'**/dist/**',

// The website ships with its own ESLint v8 config (React conventions).

// The root config here is desktop-focused; mixing the two surfaces

// pre-existing website style errors into desktop CI.

'packages/website/**',

// muya v2 (TS) self-lints with its own antfu-based config

// (packages/muya/eslint.config.mjs). Different style rules from the

// marktext-desktop config (4-space indent, semis required, strict

// ts/no-explicit-any), so we keep them isolated rather than try to

// merge two flat configs.

'packages/muya/**',

'packages/desktop/src/renderer/src/assets/symbolIcon/index.js',

'**/*.min.json',

// Playwright writes these next to its config (packages/desktop/), not at

// the repo root, so they need the `**/` prefix to be ignored at all.

'**/test-results/**',

'**/playwright-report/**'

]

},

// 1. ESLint core recommended

js.recommended,

...neostandard(),

// 2. typescript-eslint recommended — scoped to TS files only. `.vue` cannot

// join this scope: it needs `vue-eslint-parser` as the top-level parser, so

// section 5 sets that up and opts in to the rules it wants.

...tseslint.configs.recommended.map((config) => ({

...config,

files: ['**/*.ts', '**/*.tsx', '**/*.mts', '**/*.cts']

})),

// 3. TS/TSX files: typescript-eslint parser

{

files: ['**/*.ts', '**/*.tsx', '**/*.mts', '**/*.cts'],

// neostandard scopes its `@stylistic` registration to JS files, so the

// `@stylistic/*` overrides below need the plugin declared for TS here.

plugins: { '@stylistic': neostandardPlugins['@stylistic'] },

languageOptions: {

parser: tseslint.parser,

parserOptions: {

ecmaVersion: 'latest',

sourceType: 'module'

// `project: ...` (type-aware linting) intentionally omitted — too slow

// for ~200-file lint on every PR. Add a separate `lint:types` script

// later if we want type-aware rules.

},

globals: {

...globals.browser,

...globals.node,

MARKTEXT_VERSION_STRING: 'readonly',

MARKTEXT_VERSION: 'readonly',

__static: 'readonly'

}

},

rules: {

'@typescript-eslint/no-explicit-any': 'error',

'@typescript-eslint/no-unused-vars': [

'warn',

{ argsIgnorePattern: '^_', varsIgnorePattern: '^_' }

],

'@typescript-eslint/consistent-type-imports': [

'error',

{ prefer: 'type-imports', fixStyle: 'inline-type-imports' }

],

'@typescript-eslint/no-non-null-assertion': 'warn',

// Disable JS-only rules that double-trigger or fight TS:

'no-unused-vars': 'off',

'no-undef': 'off',

'no-redeclare': 'off',

// Defer to @stylistic/no-extra-semi (set by neostandard) — it knows

// about leading-semi standard-style guards; the deprecated core rule

// does not.

'no-extra-semi': 'off',

'@stylistic/indent': ['error', 2, { SwitchCase: 1, ignoreComments: true }],

'@stylistic/semi': ['error', 'never'],

// @stylistic 5 added a `catch` category; the string form now also

// forbids `catch (e)`, which is the style used throughout this repo.

'@stylistic/space-before-function-paren': [

'error',

{ anonymous: 'never', named: 'never', asyncArrow: 'never', catch: 'always' }

],

'@stylistic/arrow-parens': 'off',

'@stylistic/no-mixed-operators': 'off'

}

},

// 4. Vue plugin baseline

...pluginVue.configs['flat/recommended'],

// 5. Vue files: vue-eslint-parser with delegated TS sub-parser for <script lang="ts">

// The plugin has to be registered here too: flat config only exposes a

// plugin's rules to files matched by the config object that declares it, and

// section 2 is scoped to `.ts`.

{

files: ['**/*.vue'],

plugins: { '@typescript-eslint': tseslint.plugin },

languageOptions: {

parser: vueParser,

parserOptions: {

parser: {

ts: tseslint.parser,

tsx: tseslint.parser,

js: babelParser,

jsx: babelParser

},

ecmaVersion: 'latest',

sourceType: 'module',

extraFileExtensions: ['.vue'],

requireConfigFile: false

},

globals: { ...globals.browser }

},

rules: {

'@typescript-eslint/no-explicit-any': 'error',

// `<script setup lang="ts">` needs the TS-aware rule: core `no-unused-vars`

// misreads type members (props/emit signatures) as unused bindings.

'no-unused-vars': 'off',

'@typescript-eslint/no-unused-vars': [

'warn',

{ argsIgnorePattern: '^_', varsIgnorePattern: '^_' }

],

'vue/multi-word-component-names': 'off',

'vue/require-default-prop': 'off'

}

},

// 6. JS files: keep the Babel parser for the few hand-written `.js` files

// left in the source tree. Narrow the scope so stray .js files in the

// migrated directories can't slip past the TS lint rules.

{

files: [

'packages/desktop/src/renderer/src/assets/symbolIcon/**/*.js',

'eslint.config.js'

],

plugins: {

html: pluginHtml,

'@stylistic': neostandardPlugins['@stylistic']

},

languageOptions: {

parser: babelParser,

parserOptions: {

requireConfigFile: false,

ecmaVersion: 'latest',

sourceType: 'module'

},

globals: {

...globals.browser,

...globals.node,

MARKTEXT_VERSION_STRING: 'readonly',

MARKTEXT_VERSION: 'readonly',

__static: 'readonly'

}

},

rules: {

'@stylistic/indent': ['error', 2, { SwitchCase: 1, ignoreComments: true }],

'@stylistic/semi': ['error', 'never'],

'@stylistic/space-before-function-paren': [

'error',

{ anonymous: 'never', named: 'never', asyncArrow: 'never', catch: 'always' }

],

'@stylistic/arrow-parens': 'off',

'@stylistic/no-mixed-operators': 'off',

'no-return-await': 'error',

'no-return-assign': 'error',

'no-new': 'error',

'no-console': 'off',

'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',

'require-atomic-updates': 'off',

'prefer-const': 'off',

'no-prototype-builtins': 'off'

},

ignores: ['node_modules']

},

// 7. Test files: add Vitest globals (covers both .js and .ts specs)

{

files: ['packages/desktop/test/**/*.js', 'packages/desktop/test/**/*.ts'],

languageOptions: {

globals: { ...globals.vitest }

}

},

// 8. JSON validation

...pluginJsonc.configs['flat/recommended-with-json'],

// 9. i18n JSON locales

{

files: ['packages/desktop/src/shared/i18n/locales/*.json'],

plugins: {

'i18n-json': pluginI18nJson

},

rules: {

'i18n-json/valid-json': 'error',

'i18n-json/sorted-keys': 'warn',

'i18n-json/identical-keys': [

'error',

{

filePath: 'packages/desktop/src/shared/i18n/locales/en.json'

}

]

}

}

]