Permissions-Policy: browsing-topics directive
Deprecated
To be removed
This feature is pending removal from browsers. Using it now may lead to broken functionality in future updates. Following the announcement that Chrome will maintain its current approach to third-party cookies, Chrome decided to withdraw certain Privacy Sandbox features including the topics API.
Non-standard: This feature is not standardized. We do not recommend using non-standard features in production, as they have limited browser support, and may change or be removed. However, they can be a suitable alternative in specific cases where no standard option exists.
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 Document.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.
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.