eslint.config.mjs

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: ['eleventy/**/*.js', 'jest/**/*.js', 'src/_data/**/*.js'],
  },
  ...compat.extends('plugin:@typescript-eslint/recommended', 'plugin:prettier/recommended'),
  {
    languageOptions: {
      parser: tsParser,
      ecmaVersion: 2018,
      sourceType: 'module',

      parserOptions: {
        ecmaFeatures: {
          jsx: true,
        },
      },
    },

    rules: {
      'prettier/prettier': [
        2,
        {
          trailingComma: 'es5',
          singleQuote: true,
          printWidth: 100,
        },
      ],
      'no-unused-vars': 'off',
      '@typescript-eslint/no-unused-vars': [
        'warn',
        {
          argsIgnorePattern: '^_',
          varsIgnorePattern: '^_',
          caughtErrorsIgnorePattern: '^_',
        },
      ],
      '@typescript-eslint/explicit-function-return-type': 'off',
      '@typescript-eslint/ban-ts-comment': 0,
    },
  },
];