hostOnly

Returns true if this cookie's domain should be interpreted as a single host name, or false if it should be interpreted as a pattern. This flag will be false if its Set-Cookie header included a domain attribute.

For example, suppose the cookie's domain is example.com. If this flag is true it matches only example.com. If this flag is false it matches example.com and all subdomains including api.example.com, www.example.com, and beta.api.example.com.