eslint.config.mjs

import { defineConfig, globalIgnores } from 'eslint/config';
import typescriptEslint from '@typescript-eslint/eslint-plugin';
import globals from 'globals';
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 defineConfig([
  globalIgnores(['**/dist']),
  {
    extends: compat.extends('eslint:recommended', 'plugin:@typescript-eslint/recommended'),

    plugins: {
      '@typescript-eslint': typescriptEslint,
    },

    languageOptions: {
      globals: {
        ...globals.browser,
      },

      parser: tsParser,
      ecmaVersion: 5,
      sourceType: 'script',

      parserOptions: {
        project: './tsconfig.eslint.json',
      },
    },

    rules: {
      '@typescript-eslint/switch-exhaustiveness-check': 'error',
      '@typescript-eslint/consistent-type-imports': 'error',
      '@typescript-eslint/no-non-null-assertion': 'off',
    },
  },
]);