Limited availability
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
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) => { }
Event type
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();
Specifications Browser compatibility See also
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