http permissions policy directive
Permissions-Policy: bluetooth directive
Limited availability
The HTTP Permissions-Policy header bluetooth directive controls whether the current document is allowed to use the Web Bluetooth API.
Specifically, where a defined policy disallows use of this feature, the methods of the Bluetooth object returned by bluetooth, will block access:
getAvailability()will always fulfill its returnedPromisewith a value offalse.getDevices()will reject its returnedPromisewith aSecurityErrorDOMException.requestDevice()will reject its returnedPromisewith aSecurityErrorDOMException.
Syntax
Permissions-Policy: bluetooth=<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 bluetooth is self. The top-level browsing context and same-origin iframes are allowed access to the bluetooth feature by default.
Examples
Basic usage
SecureCorp Inc. wants to disallow bluetooth within all cross-origin iframes except 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: bluetooth=(self "https://example.com")
SecureCorp Inc. must also include an <allow> attribute on each <iframe> element where bluetooth is to be allowed:
<iframe src="https://example.com/blue" allow="bluetooth"></iframe>
[!NOTE] Specifying the
Permissions-Policyheader in this manner disallowsbluetoothfor other origins, even if they are allowed by the<iframe>allowattribute.
Using the default policy
If an allowlist for bluetooth is not defined by a Permissions-Policy response header, user agents will apply the default allowlist self. In this mode, bluetooth is automatically allowed in the top-level browsing context and same-origin iframes, but not in cross-origin iframes.
To allow bluetooth in a cross-origin iframe, include an <allow> attribute on the <iframe> element:
<iframe src="https://other.com/blue" allow="bluetooth"></iframe>