The activate event is fired when a sensor becomes activated. It means that it will start obtaining readings.

The Sensor interface is a base class, onactivate and the activate event may only be used on one of the derived classes.

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener("activate", (event) => {});

onactivate = (event) => {};

A generic Event with no added properties.

This example adds an event listener to log the activation of an Accelerometer.

const acl = new Accelerometer({ frequency: 60 });
acl.addEventListener("activate", () => console.log("Ready to measure."));
acl.start();

• Sensor error event
• Sensor reading event