http permissions policy directive
Permissions-Policy: browsing-topics directive
The HTTP Permissions-Policy header browsing-topics directive controls access to the Topics API.
Where a policy specifically disallows the use of the Topics API, any attempts to call the browsingTopics() method or send a request with a Sec-Browsing-Topics header will fail with a NotAllowedError DOMException.
Syntax
Permissions-Policy: browsing-topics=<allowlist>;
<allowlist>- : A list of origins for which permission is granted to use the feature. See
Permissions-Policy> Syntax for more details.
- : A list of origins for which permission is granted to use the feature. See
Default policy
The default allowlist for browsing-topics is *.
Specifications
This feature is not part of an official standard, although it is specified in the Topics API Unofficial Proposal Draft.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.