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 [
    {
        ignores: ['**/node_modules/', '**/dist/']
    },
    ...compat.extends(
        'eslint:recommended',
        'plugin:@typescript-eslint/recommended',
        'plugin:@typescript-eslint/recommended-requiring-type-checking',
        'plugin:prettier/recommended',
        'standard-with-typescript',
        'prettier'
    ),
    {
        plugins: {
            '@typescript-eslint': typescriptEslint
        },

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

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

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

        rules: {
            '@typescript-eslint/no-unused-vars': [
                'error',
                {
                    argsIgnorePattern: '^_'
                }
            ],

            '@typescript-eslint/explicit-function-return-type': 'error',
            '@typescript-eslint/no-explicit-any': 'error',
            '@typescript-eslint/no-non-null-assertion': 'error',
            '@typescript-eslint/no-unnecessary-type-assertion': 'error',
            '@typescript-eslint/prefer-nullish-coalescing': 'error',
            '@typescript-eslint/prefer-optional-chain': 'error',
            '@typescript-eslint/non-nullable-type-assertion-style': 'off',
            '@typescript-eslint/no-invalid-void-type': 'off',
            '@typescript-eslint/restrict-template-expressions': 'off',
            '@typescript-eslint/ban-types': 'off',
            '@typescript-eslint/no-throw-literal': 'off',
            '@typescript-eslint/lines-between-class-members': 'off',

            'prettier/prettier': [
                'error',
                {
                    singleQuote: true,
                    trailingComma: 'none',
                    tabWidth: 4
                }
            ],

            'no-warning-comments': 'warn',
            'no-multi-str': 'off'
        }
    }
];