chore: Update to ESLint 9

.github/workflows/super-linter.yml

@@ -49,6 +49,7 @@ jobs:
           VALIDATE_JAVASCRIPT_ES: false
           VALIDATE_JAVASCRIPT_PRETTIER: false
           VALIDATE_JAVASCRIPT_STANDARD: false
+          VALIDATE_JSON: false
           VALIDATE_JSON_PRETTIER: false
           VALIDATE_JSCPD: false
           VALIDATE_NATURAL_LANGUAGE: false

eslint.config.js

@@ -0,0 +1,201 @@
+const js = require('@eslint/js')
+const typescript = require('@typescript-eslint/eslint-plugin')
+const typescriptParser = require('@typescript-eslint/parser')
+const prettier = require('eslint-plugin-prettier')
+const prettierConfig = require('eslint-config-prettier')
+
+module.exports = [
+  // Base recommended config for JavaScript files
+  js.configs.recommended,
+
+  // JavaScript files
+  {
+    files: ['**/*.js', '**/*.mjs'],
+    languageOptions: {
+      ecmaVersion: 2020,
+      sourceType: 'module',
+      globals: {
+        process: 'readonly',
+        Buffer: 'readonly',
+        __dirname: 'readonly',
+        __filename: 'readonly',
+        module: 'readonly',
+        require: 'readonly',
+        exports: 'readonly',
+        global: 'readonly',
+        console: 'readonly',
+        setImmediate: 'readonly',
+      },
+    },
+    plugins: {
+      prettier,
+    },
+    rules: {
+      'prettier/prettier': 'error',
+    },
+  },
+
+  // TypeScript files
+  {
+    files: ['**/*.ts'],
+    languageOptions: {
+      parser: typescriptParser,
+      parserOptions: {
+        ecmaVersion: 2020,
+        sourceType: 'module',
+        project: './tsconfig.json',
+        warnOnUnsupportedTypeScriptVersion: false,
+      },
+      globals: {
+        process: 'readonly',
+        Buffer: 'readonly',
+        __dirname: 'readonly',
+        __filename: 'readonly',
+        module: 'readonly',
+        require: 'readonly',
+        exports: 'readonly',
+        global: 'readonly',
+        console: 'readonly',
+        setImmediate: 'readonly',
+      },
+    },
+    plugins: {
+      '@typescript-eslint': typescript,
+      prettier,
+    },
+    rules: {
+      // Base JavaScript rules we want to keep
+      'constructor-super': 'error',
+      'for-direction': 'error',
+      'getter-return': 'error',
+      'no-async-promise-executor': 'error',
+      'no-case-declarations': 'error',
+      'no-class-assign': 'error',
+      'no-compare-neg-zero': 'error',
+      'no-cond-assign': 'error',
+      'no-const-assign': 'error',
+      'no-constant-condition': 'error',
+      'no-control-regex': 'error',
+      'no-debugger': 'error',
+      'no-delete-var': 'error',
+      'no-dupe-args': 'error',
+      'no-dupe-class-members': 'error',
+      'no-dupe-else-if': 'error',
+      'no-dupe-keys': 'error',
+      'no-duplicate-case': 'error',
+      'no-empty': 'error',
+      'no-empty-character-class': 'error',
+      'no-empty-pattern': 'error',
+      'no-ex-assign': 'error',
+      'no-extra-boolean-cast': 'error',
+      'no-extra-semi': 'error',
+      'no-fallthrough': 'error',
+      'no-func-assign': 'error',
+      'no-global-assign': 'error',
+      'no-import-assign': 'error',
+      'no-inner-declarations': 'error',
+      'no-invalid-regexp': 'error',
+      'no-irregular-whitespace': 'error',
+      'no-misleading-character-class': 'error',
+      'no-mixed-spaces-and-tabs': 'error',
+      'no-new-symbol': 'error',
+      'no-nonoctal-decimal-escape': 'error',
+      'no-obj-calls': 'error',
+      'no-octal': 'error',
+      'no-prototype-builtins': 'error',
+      'no-redeclare': 'error',
+      'no-regex-spaces': 'error',
+      'no-self-assign': 'error',
+      'no-setter-return': 'error',
+      'no-shadow-restricted-names': 'error',
+      'no-sparse-arrays': 'error',
+      'no-this-before-super': 'error',
+      'no-unexpected-multiline': 'error',
+      'no-unreachable': 'error',
+      'no-unsafe-finally': 'error',
+      'no-unsafe-negation': 'error',
+      'no-useless-catch': 'error',
+      'no-useless-escape': 'off',
+      'no-with': 'error',
+      'require-yield': 'error',
+      'use-isnan': 'error',
+      'valid-typeof': 'error',
+
+      // Disable rules that TypeScript handles better
+      'no-unused-vars': 'off',
+      'no-undef': 'off',
+
+      // TypeScript-specific rules
+      '@typescript-eslint/no-unused-vars': [
+        'error',
+        {
+          argsIgnorePattern: '^_',
+          varsIgnorePattern: '^_',
+          caughtErrorsIgnorePattern: '^_|^e$|^error$',
+          destructuredArrayIgnorePattern: '^_',
+          ignoreRestSiblings: true,
+        },
+      ],
+      '@typescript-eslint/no-explicit-any': 'warn',
+
+      'prettier/prettier': 'error',
+
+      // Custom rules from original config
+      'arrow-body-style': ['error'],
+      'no-template-curly-in-string': 'error',
+      'no-useless-concat': 'error',
+      'no-var': 'error',
+      'one-var': ['error', 'never'],
+      'prefer-arrow-callback': ['error', { allowNamedFunctions: true }],
+      'prefer-const': 'error',
+      'prefer-template': 'error',
+      'template-curly-spacing': 'error',
+      'template-tag-spacing': 'error',
+      quotes: ['error', 'single', { avoidEscape: true }],
+
+      // TypeScript-specific rule overrides from original config
+      '@typescript-eslint/ban-ts-comment': 'off',
+      '@typescript-eslint/no-unsafe-argument': 'off',
+      '@typescript-eslint/no-unsafe-assignment': 'off',
+      '@typescript-eslint/no-unsafe-call': 'off',
+      '@typescript-eslint/no-non-null-assertion': 'off',
+      '@typescript-eslint/no-unsafe-member-access': 'off',
+      '@typescript-eslint/no-var-requires': 'off',
+      '@typescript-eslint/no-require-imports': 'off',
+      '@typescript-eslint/restrict-template-expressions': 'off',
+    },
+  },
+
+  // Jest test files
+  {
+    files: ['**/*.spec.js'],
+    languageOptions: {
+      globals: {
+        describe: 'readonly',
+        it: 'readonly',
+        test: 'readonly',
+        expect: 'readonly',
+        beforeEach: 'readonly',
+        afterEach: 'readonly',
+        beforeAll: 'readonly',
+        afterAll: 'readonly',
+        jest: 'readonly',
+      },
+    },
+  },
+
+  // Prettier config
+  prettierConfig,
+
+  // Ignore patterns (replacing .eslintignore)
+  {
+    ignores: [
+      'node_modules/**',
+      'bin/**',
+      'dist/**',
+      'website/.astro/**',
+      'website/build/**',
+      'website/src/**',
+    ],
+  },
+]