Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The HTTP Permissions-Policy header summarizer directive controls access to the Summarizer API.
Specifically, where a defined policy blocks Summarizer API usage, the Summarizer.availability() static method will return unavailable, and any attempts to call the API's other methods will fail with a NotAllowedError DOMException.
Permissions-Policy: summarizer=<allowlist>;<allowlist>A list of origins for which permission is granted to use the feature. See Permissions-Policy > Syntax for more details.
The default allowlist for summarizer is self.