http permissions policy directive
Permissions-Policy: gamepad directive
Limited availability
The HTTP Permissions-Policy header gamepad directive controls whether the current document is allowed to use the Gamepad API.
Specifically, where a defined policy blocks use of this feature, calls to getGamepads() will throw a SecurityError DOMException. In addition, the gamepadconnected and gamepaddisconnected events will not fire.
Syntax
Permissions-Policy: gamepad=<allowlist>;
<allowlist>- : A list of origins for which permission is granted to use the feature. See
Permissions-Policy> Syntax for more details.
- : A list of origins for which permission is granted to use the feature. See
Default policy
The default allowlist for gamepad is *.
Examples
General example
SecureCorp Inc. wants to disable the Gamepad API within all browsing contexts except for its own origin and those whose origin is https://example.com.
It can do so by delivering the following HTTP response header to define a Permissions Policy:
Permissions-Policy: gamepad=(self "https://example.com")
With an <iframe> element
FastCorp Inc. wants to disable gamepad for all cross-origin child frames, except for a specific <iframe>.
It can do so by delivering the following HTTP response header to define a Permissions Policy:
Permissions-Policy: gamepad=(self)
Then include an <allow> attribute on the <iframe> element:
<iframe src="https://other.com/game" allow="gamepad"></iframe>
iframe attributes can selectively enable features in certain frames, and not in others, even if those frames contain documents from the same origin.