The start() method of the IdleDetector interface returns a Promise that resolves when the detector starts listening for changes in the user's idle state. This method takes an optional options object with the threshold in milliseconds where inactivity should be reported and signal for an AbortSignal to abort the idle detector.

options Optional

An object with the following properties:

threshold

The minimum number of idle milliseconds before reporting should begin.

signal

A reference to an AbortSignal instance allowing you to abort idle detection.

A Promise.

NotAllowedError DOMException

Use of this feature was blocked by a Permissions Policy.

The following example shows how to start idle detection using the options argument. It retrieves an instance of AbortSignal from an instance of AbortController.

const controller = new AbortController();
const signal = controller.signal;

await idleDetector.start({
  threshold: 60_000,
  signal,
});
console.log("IdleDetector is active.");