PressureObserver: knownSources static property

{{APIRef("Compute Pressure API")}}{{SeeCompatTable}}{{AvailableInWorkers("window_and_worker_except_service")}}{{securecontext_header}}

The static knownSources read-only property of the {{domxref("PressureObserver")}} interface returns an array of the {{domxref("PressureRecord.source","source")}} values supported by the user agent in alphabetical order.

[!NOTE] The list of supported sources varies per browser, operating system, and hardware, and is evolving. This property is merely a hint about source types the user agents supports. Call {{domxref("PressureObserver.observe()", "observe()")}} and check for a NotSupportedError to see if pressure observation is possible.

Value

An array of {{domxref("PressureRecord.source")}} values.

Examples

Using the console to see known sources

To find out which {{domxref("PressureRecord.source","source")}} values a browser knows, enter <kbd>PressureObserver.knownSources</kbd> into the console. This will return an array of known sources.

PressureObserver.knownSources;
// returns ["cpu"] in Chrome 125

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}