Javascript regex to match fully qualified domain name, without protocol, optional subdomain -


i haven't been able find 1 , i'm trying isn't quite working out me.

i want match domains that:

  • don't contain protocol (http, https, ftp)
  • optionally include subdomain
  • don't start hyphen can contain hyphen

example domains match:

  • domain.com
  • example.domain.com
  • example.domain-hyphen.com
  • www.domain.com
  • example.museum

example domains not match:

  • http://example.com
  • subdomain.-example.com
  • example.com/parameter
  • example.com?anything
  • www.subdomain.domain.com

what i've got:

/^(?!:\/\/)(^[a-za-z0-9])?.[a-za-z0-9-]+\.[a-za-z]{2,6}?$/i

it's not matching protocols, allowing hyphen inside domain, not allowing trailing characters after tld, , allowing subdomain (but 1 character).

i still need allow subdomains of length, not allow www.subdomain.domain.com , not allow leading hyphen.

try

/^(?!:\/\/)([a-za-z0-9]+\.)?[a-za-z0-9][a-za-z0-9-]+\.[a-za-z]{2,6}?$/i

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