import { isDefined } from './isDefined';

export function isDomain(url: string | undefined | null) {
  return (
    isDefined(url) &&
    /^((?!-))(xn--)?[a-z0-9][a-z0-9-_]{0,61}[a-z0-9]{0,1}\.(xn--)?([a-z0-9-]{1,61}|[a-z0-9-]{1,30}\.[a-z]{2,})$/.test(
      url,
    )
  );
}