// Scheme: https://tools.ietf.org/html/rfc3986#section-3.1
// Absolute URL: https://tools.ietf.org/html/rfc3986#section-4.3
const ABSOLUTE_URL_REGEX = /^[a-zA-Z][a-zA-Z\d+\-.]*?:/;

// Windows paths like `c:\`
const WINDOWS_PATH_REGEX = /^[a-zA-Z]:\\/;

export default function isAbsoluteUrl(url) {
	if (typeof url !== 'string') {
		throw new TypeError(`Expected a \`string\`, got \`${typeof url}\``);
	}

	if (WINDOWS_PATH_REGEX.test(url)) {
		return false;
	}

	return ABSOLUTE_URL_REGEX.test(url);
}