PressureRecord

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

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

• {{domxref("PressureRecord.source")}} {{ReadOnlyInline}} {{experimental_inline}}
  • : A string indicating the origin source from which the record is coming.
• {{domxref("PressureRecord.state")}} {{ReadOnlyInline}} {{experimental_inline}}
  • : A string indicating the pressure state recorded.
• {{domxref("PressureRecord.time")}} {{ReadOnlyInline}} {{experimental_inline}}
  • : A {{domxref("DOMHighResTimeStamp")}} indicating the timestamp of the record.

Instance methods

• {{domxref("PressureRecord.toJSON()")}} {{experimental_inline}}
  • : 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.

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

{{Specifications}}

Browser compatibility

{{Compat}}