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.

Syntax

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.

Default policy

The default allowlist for usb is self.

Specifications

Specification
WebUSB API
# permissions-policy

Browser compatibility

BCD tables only load in the browser

See also