PressureObserver: knownSources static property

Limited availabilityAvailable in workersSecure context

The static knownSources read-only property of the PressureObserver interface returns an array of the 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 observe() and check for a NotSupportedError to see if pressure observation is possible.

Value

An array of source values.

Examples

Using the console to see known sources

To find out which source values a browser knows, enter PressureObserver.knownSources into the console. This will return an array of known sources.

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

Specifications

Browser compatibility