4 ms·

But is "foo.localhost" a valid domain name, for cookies and such?

• jeroenhd 2y ago
  The RFC treats .localhost as a full TLD. I believe Windows does as well, as does Ubuntu (using default systemd-resolved), but macOS doesn't seem to resolve .localhost by default, necessitating the host file trickery. Of course, in the early internet, the difference between a TLD and a host name weren't quite as clear as they are right now.
  • EGreg 2y ago
    We still need the Public Suffix List because of how inconsistent it was
  • sebazzz 2y ago
    > I believe Windows does as well I cannot ping xyz.localhost because it doesn't resolve it.