Ultimate regex specific domain

regex.ts

export const getValidUrlRegex = (domainName?: string) => {
  return domainName
    ? RegExp(
        /^(?:https?:\/\/)?(?:www\.)?(?:(?<subdomain>[a-z0-9-]+)\.)?/.source +
          RegExp(domainName).source +
          /\.(?:(?<tld>[a-z]{1,63}))?(?::(?<port>[0-9]{1,5}))??(?:[/#](?<path>[\w/\-._~:/?#[\]@!$&'()*+,;=.]*)?)?$/
            .source,
      )
    : /^(?:https?:\/\/)?(?:www\.)?(?:(?<subdomain>[a-z0-9-]+)\.)?(?<domain>[a-z0-9-]+)\.(?:(?<tld>[a-z]{1,63}))?(?::(?<port>[0-9]{1,5}))??(?:[/#](?<path>[\w/\-._~:/?#[\]@!$&'()*+,;=.]*)?)?$/;
};