PressureRecord

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.

Note: This feature is available in Web Workers, except for Service Workers.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The PressureRecord interface is part of the Compute Pressure API and describes the pressure trend of a source at a specific moment of transition.

Instance properties

PressureRecord.source Read only Experimental

A string indicating the origin source from which the record is coming.

PressureRecord.state Read only Experimental

A string indicating the pressure state recorded.

PressureRecord.time Read only Experimental

A DOMHighResTimeStamp indicating the timestamp of the record.

Instance methods

PressureRecord.toJSON() Experimental

Returns a JSON representation of the PressureRecord object.

Examples

Using the PressureRecord object

In the following example we log the properties of the PressureRecord object in the pressure observer callback.

js
function callback(records) {
  const lastRecord = records[records.length - 1];
  console.log(`Current pressure is ${lastRecord.state}`);
  console.log(`Current pressure observed at ${lastRecord.time}`);
  console.log(`Current pressure source: ${lastRecord.source}`);
}

try {
  const observer = new PressureObserver(callback);
  await observer.observe("cpu", {
    sampleInterval: 1000, // 1000ms
  });
} catch (error) {
  // report error setting up the observer
}

Specifications

Specification
Compute Pressure Level 1
# the-pressurerecord-interface

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
PressureRecord
Experimental
source
Experimental
state
Experimental
time
Experimental
toJSON
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.