eslint.config.js

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import js from '@eslint/js'
import tseslint from 'typescript-eslint'
import svelte from 'eslint-plugin-svelte'
import globalsPackage from 'globals'

const allowedProps = ['__APP_VERSION__', 'FlexSearch', 'ADD_TAGS', 'ADD_ATTR']

const namingConventionRules = {
  '@typescript-eslint/naming-convention': [
    'error',
    {
      selector: 'interface',
      format: ['PascalCase'],
    },
    {
      selector: 'typeAlias',
      format: ['PascalCase'],
    },
    {
      selector: 'class',
      format: ['PascalCase'],
    },
    {
      selector: 'method',
      format: ['camelCase'],
    },
    {
      selector: 'function',
      format: ['camelCase'],
    },
    {
      selector: 'variableLike',
      format: ['camelCase'],
    },
    {
      selector: 'variableLike',
      filter: {
        regex: '.*Component$',
        match: true,
      },
      format: ['PascalCase'],
    },
    {
      selector: 'variableLike',
      filter: {
        regex: '^__APP_VERSION__$',
        match: true,
      },
      format: null,
    },
    {
      selector: 'property',
      format: ['camelCase'],
      leadingUnderscore: 'allow',
    },
    {
      selector: 'property',
      modifiers: ['requiresQuotes'],
      format: null,
    },
    {
      selector: 'property',
      filter: {
        regex: `^(${allowedProps.join('|')})$`,
        match: true,
      },
      format: null,
    },
  ],
}

const globals = {
  ...globalsPackage.browser,
  __APP_VERSION__: 'readonly',
}

const strictTypeScriptRules = {
  '@typescript-eslint/no-unsafe-assignment': 'error',
  '@typescript-eslint/no-explicit-any': 'error',
  '@typescript-eslint/no-unsafe-call': 'error',
  '@typescript-eslint/no-unsafe-return': 'error',
  '@typescript-eslint/no-unsafe-member-access': 'error',
  '@typescript-eslint/no-inferrable-types': 'off',
  'init-declarations': ['error', 'always'],
}

export default [
  js.configs.recommended,
  ...tseslint.configs.recommended,
  ...svelte.configs['flat/recommended'],
  {
    ignores: [
      '**/*.json.js',
      'dist/',
      'node_modules/',
      'package/app/assets/',
      'src/page/.router-index.ts',
      'docs/.vitepress/cache/',
      'docs/.vitepress/dist/',
      'tmp/',
    ],
  },
  {
    files: ['**/*.ts', '**/*.svelte.ts'],
    ignores: ['eslint.config.js'],
    languageOptions: {
      globals,
      parser: tseslint.parser,
      parserOptions: {
        project: './tsconfig.json',
      },
    },
    rules: { ...namingConventionRules, ...strictTypeScriptRules },
  },
  {
    files: ['**/*.svelte'],
    languageOptions: {
      globals,
      parserOptions: {
        parser: tseslint.parser,
        projectService: true,
        extraFileExtensions: ['.svelte'],
      },
    },
    linterOptions: {
      // Allow eslint-disable comments for Svelte 5 $bindable() false positives
      reportUnusedDisableDirectives: 'off',
    },
    rules: { ...namingConventionRules, ...strictTypeScriptRules },
  },
]