eslint.config.mjs

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 [
  ...compat.extends(
    'eslint:recommended',
    'plugin:@typescript-eslint/eslint-recommended',
    'plugin:@typescript-eslint/recommended'
  ),
  {
    plugins: {
      '@typescript-eslint': typescriptEslint,
    },

    languageOptions: {
      globals: {
        ...globals.browser,
        ...globals.node,
        ...globals.mocha,
        Atomics: 'readonly',
        SharedArrayBuffer: 'readonly',
      },

      parser: tsParser,
      ecmaVersion: 2018,
      sourceType: 'module',
    },

    rules: {
      indent: [
        'error',
        2,
        {
          SwitchCase: 1,
        },
      ],

      'linebreak-style': ['error', 'unix'],

      'no-constant-condition': [
        'error',
        {
          checkLoops: false,
        },
      ],

      quotes: [
        'error',
        'single',
        {
          allowTemplateLiterals: false,
          avoidEscape: true,
        },
      ],

      semi: ['error', 'always'],

      'no-console': [
        'warn',
        {
          allow: ['warn', 'error', 'info', 'debug'],
        },
      ],

      'no-trailing-spaces': 'error',
      'eol-last': 'error',

      '@typescript-eslint/ban-ts-comment': [
        'error',
        {
          'ts-expect-error': 'allow-with-description',
        },
      ],

      '@typescript-eslint/ban-tslint-comment': 'error',

      '@typescript-eslint/consistent-type-assertions': [
        'error',
        {
          assertionStyle: 'as',
          objectLiteralTypeAssertions: 'never',
        },
      ],

      // "@typescript-eslint/member-delimiter-style": "error",
      '@typescript-eslint/no-inferrable-types': 'off',
      '@typescript-eslint/no-explicit-any': 0,
      // "@typescript-eslint/no-for-in-array": "error",
      '@typescript-eslint/no-invalid-void-type': 'error',
      '@typescript-eslint/no-namespace': 'error',
      '@typescript-eslint/no-non-null-asserted-optional-chain': 'error',

      '@typescript-eslint/no-unsafe-function-type': 0,
      '@typescript-eslint/no-unused-vars': [
        'error',
        {
          ignoreRestSiblings: true,
          args: 'none',
        },
      ],

      '@typescript-eslint/prefer-for-of': ['warn'],
      '@typescript-eslint/prefer-ts-expect-error': ['error'],
    },
  },
];