ESLint 9.x

eslint.config.mjs

@@ -0,0 +1,77 @@
+import tsParser from '@typescript-eslint/parser';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import js from '@eslint/js';
+import { FlatCompat } from '@eslint/eslintrc';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+    baseDirectory: __dirname,
+    recommendedConfig: js.configs.recommended,
+    allConfig: js.configs.all,
+});
+
+export default [
+    {
+        ignores: ['**/build/', '**/.prettierrc.js', '**/.eslintrc.js', 'admin/words.js', '**/test/', '.dev-server/**'],
+    },
+    ...compat.extends('plugin:@typescript-eslint/recommended', 'plugin:prettier/recommended'),
+    {
+        plugins: {},
+
+        languageOptions: {
+            parser: tsParser,
+            ecmaVersion: 'latest',
+            sourceType: 'module',
+
+            parserOptions: {
+                project: './tsconfig.json',
+            },
+        },
+
+        rules: {
+            '@typescript-eslint/no-parameter-properties': 'off',
+            '@typescript-eslint/no-explicit-any': 'off',
+
+            '@typescript-eslint/no-use-before-define': [
+                'error',
+                {
+                    functions: false,
+                    typedefs: false,
+                    classes: false,
+                },
+            ],
+
+            '@typescript-eslint/no-unused-vars': [
+                'error',
+                {
+                    ignoreRestSiblings: true,
+                    argsIgnorePattern: '^_',
+                },
+            ],
+
+            '@typescript-eslint/explicit-function-return-type': [
+                'warn',
+                {
+                    allowExpressions: true,
+                    allowTypedFunctionExpressions: true,
+                },
+            ],
+
+            '@typescript-eslint/no-object-literal-type-assertion': 'off',
+            '@typescript-eslint/interface-name-prefix': 'off',
+            '@typescript-eslint/no-non-null-assertion': 'off',
+            'no-var': 'error',
+            'prefer-const': 'error',
+            'no-trailing-spaces': 'error',
+        },
+    },
+    {
+        files: ['**/*.test.ts'],
+
+        rules: {
+            '@typescript-eslint/explicit-function-return-type': 'off',
+        },
+    },
+];