eslint.config.mjs

import globals from "globals";
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"), {
	languageOptions: {
		globals: {
			...globals.node
		},

		ecmaVersion: 2021,
		sourceType: "module"
	},

	rules: {
		"arrow-spacing": ["warn", {
			before: true,
			after: true
		}],

		"brace-style": ["error", "1tbs", {
			allowSingleLine: true
		}],

		"comma-dangle": ["error", "never"],
		"comma-spacing": "error",
		"comma-style": "error",
		curly: ["error", "multi-line", "consistent"],
		"dot-location": ["error", "property"],
		"handle-callback-err": "off",

		indent: ["error", "tab", {
			SwitchCase: 1
		}],

		"keyword-spacing": "error",

		"max-nested-callbacks": ["error", {
			max: 4
		}],

		"max-statements-per-line": ["error", {
			max: 2
		}],

		"no-console": "off",
		"no-empty": "warn",
		"no-empty-function": "error",
		"no-floating-decimal": "error",
		"no-lonely-if": "error",
		"no-multi-spaces": "error",

		"no-multiple-empty-lines": ["error", {
			max: 2,
			maxEOF: 1,
			maxBOF: 0
		}],

		"no-shadow": ["error", {
			allow: ["err", "resolve", "reject"]
		}],

		"no-trailing-spaces": ["error"],
		"no-var": "error",
		"object-curly-spacing": ["error", "always"],
		"prefer-const": "error",
		quotes: ["error", "double"],
		semi: ["error", "always"],
		"space-before-blocks": "error",

		"space-before-function-paren": ["error", {
			anonymous: "never",
			named: "never",
			asyncArrow: "always"
		}],

		"space-in-parens": "error",
		"space-infix-ops": "error",
		"space-unary-ops": "error",
		"spaced-comment": "error",
		yoda: "error",
		"default-case-last": "error",

		"switch-colon-spacing": ["error", {
			after: true,
			before: false
		}]
	}
}];