Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The HTTP Permissions-Policy header on-device-speech-recognition directive controls access to the on-device speech recognition functionality of the Web Speech API.
Specifically, where a defined policy blocks usage, any attempts to call the API's SpeechRecognition.available() or SpeechRecognition.install() methods will fail.
Permissions-Policy: on-device-speech-recognition=<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 on-device-speech-recognition is self.