Permissions-Policy: bluetooth directive
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 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 Navigator.bluetooth, will block access:
Bluetooth.getAvailability()will always fulfill its returnedPromisewith a value offalse.Bluetooth.getDevices()will reject its returnedPromisewith aSecurityErrorDOMException.Bluetooth.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.
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-Policy header in this manner disallows bluetooth for other origins, even if they are allowed by the <iframe> allow attribute.
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>
Specifications
| Specification |
|---|
| Web Bluetooth # permissions-policy |