eslint.config.mjs

import unusedImports from 'eslint-plugin-unused-imports';
import preferArrow from 'eslint-plugin-prefer-arrow';
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: ['**/*.{js,jsx,mjs,cjs,d.ts}'],
  },
  {
    plugins: {
      'unused-imports': unusedImports,
      'prefer-arrow': preferArrow,
    },

    rules: {
      'no-unused-vars': [
        'warn',
        {
          vars: 'all',
          varsIgnorePattern: '^_.*',
          args: 'after-used',
          argsIgnorePattern: '^_.*',
        },
      ],

      'unused-imports/no-unused-imports': 'error',
      'unused-imports/no-unused-vars': 'off',

      'prefer-arrow/prefer-arrow-functions': [
        'warn',
        {
          disallowPrototype: true,
          singleReturnOnly: false,
          classPropertiesAllowed: false,
        },
      ],
    },
  },
  ...compat
    .extends('eslint:recommended', 'plugin:@typescript-eslint/recommended', 'plugin:prettier/recommended')
    .map(config => ({
      ...config,
      files: ['**/*.ts'],
    })),
  {
    files: ['**/*.ts'],
    rules: {
      '@typescript-eslint/no-explicit-any': 'off',
      '@typescript-eslint/no-unused-vars': 'off',
      '@typescript-eslint/no-unused-expressions': 'off',
    },
  },
];