PressureRecord

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental:This is anexperimental technology
Check theBrowser compatibility table carefully before using this in production.

Note: This feature is available inWeb Workers, except forService Workers.

Secure context: This feature is available only insecure contexts (HTTPS), in some or allsupporting browsers.

ThePressureRecord interface is part of theCompute Pressure API and describes the pressure trend of a source at a specific moment of transition.

Instance properties

PressureRecord.sourceRead onlyExperimental: A string indicating the origin source from which the record is coming.
PressureRecord.stateRead onlyExperimental: A string indicating the pressure state recorded.
PressureRecord.timeRead onlyExperimental: A DOMHighResTimeStamp indicating the timestamp of the record.

Instance methods

PressureRecord.toJSON()Experimental: Returns a JSON representation of thePressureRecord object.

Examples

Using the`PressureRecord` object

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

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}