Skip to content

Set-Cookie: Domain directive default value clarification #41651

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 4 commits into from
Oct 28, 2025
Merged

Set-Cookie: Domain directive default value clarification #41651

Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
8346dbc
Set-Cookie: Domain directive default value clarification
hamishwillee Oct 24, 2025
7961d25
Apply suggestion from @hamishwillee
hamishwillee Oct 27, 2025
bf92ad0
Apply suggestion from @hamishwillee
hamishwillee Oct 27, 2025
446697b
Update files/en-us/web/http/reference/headers/set-cookie/index.md
hamishwillee Oct 27, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 2 additions & 1 deletion files/en-us/web/http/reference/headers/set-cookie/index.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -74,7 +74,8 @@ Set-Cookie: <cookie-name>=<cookie-value>; Domain=<domain-value>; Secure; HttpOnl

Only the current domain can be set as the value, or a domain of a higher order, unless it is a public suffix. Setting the domain will make the cookie available to it, as well as to all its subdomains.

If omitted, this attribute defaults to the host of the current document URL, not including subdomains.
If omitted, the cookie is returned only to the host that sent them (i.e., it becomes a "host-only cookie").
This is more restrictive than setting the host name, as the cookie is not made available to subdomains of the host.

Contrary to earlier specifications, leading dots in domain names (`.example.com`) are ignored.

Expand Down