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: ['**/dist'],
}, ...compat.extends(
  'eslint:recommended',
  'plugin:@typescript-eslint/eslint-recommended',
  'plugin:@typescript-eslint/recommended',
), {
  languageOptions: {
    parser: tsParser,
    ecmaVersion: 2018,
    sourceType: 'module',
  },

  rules: {
    quotes: ['warn', 'single'],

    indent: ['warn', 2, {
      SwitchCase: 1,
    }],

    'comma-dangle': ['warn', 'always-multiline'],
    'dot-notation': 'off',
    eqeqeq: 'warn',
    curly: ['warn', 'all'],
    'brace-style': ['warn'],
    'prefer-arrow-callback': ['warn'],
    'max-len': ['warn', 140],
    'no-console': ['warn'],
    'no-non-null-assertion': ['off'],
    'comma-spacing': ['error'],

    'no-multi-spaces': ['warn', {
      ignoreEOLComments: true,
    }],

    'no-trailing-spaces': ['warn'],

    'lines-between-class-members': ['warn', 'always', {
      exceptAfterSingleLine: true,
    }],

    '@typescript-eslint/explicit-function-return-type': 'off',
    '@typescript-eslint/no-non-null-assertion': 'off',
    '@typescript-eslint/explicit-module-boundary-types': 'off',
    semi: ['warn'],
  },
}];