The vibrate read-only property of the Notification interface specifies a vibration pattern for the device's vibration hardware to emit when the notification fires. This is specified in the vibrate option of the Notification() constructor.

A vibration pattern, as specified in the Vibration API spec.

The following snippet is intended to create a notification that also triggers a device vibration; a simple options object is created, and then the notification is fired using the Notification() constructor.

const options = {
  body: "Your code submission has received 3 new review comments.",
  vibrate: [200, 100, 200],
};

const n = new Notification("New review activity", options);

console.log(n.vibrate); // "[200, 100, 200]"

• Using the Notifications API