Permissions-Policy: usb

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The HTTP Permissions-Policy header usb directive controls whether the current document is allowed to use the WebUSB API.

Specifically, where a defined policy blocks WebHID usage, the Navigator.usb property will not be available.

http

Permissions-Policy: usb=<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 usb is self.

Specification
WebUSB API # permissions-policy

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