Permissions-Policy: compute-pressure

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 compute-pressure directive controls access to the Compute Pressure API.

Syntax

http
Permissions-Policy: compute-pressure=<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 compute-pressure is self allowing usage in same-origin nested frames but preventing third-party content from using the feature. Workers (dedicated and shared) adhere to the permission policy set by their owning document(s).

Examples

Enabling compute pressure on third-party content

Third-party usage can be selectively enabled using the allow attribute on <iframe> elements:

html
<iframe src="https://example.com" allow="compute-pressure"></iframe>

Disabling the Compute Pressure API completely

This HTTP response header disables compute pressure completely:

http
Permissions-Policy: {"compute-pressure": []}

Specifications

Specification
Compute Pressure Level 1
# policy-control

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
compute-pressure
Experimental

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support
Experimental. Expect behavior to change in the future.

See also