Sensor: activate event
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
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.
Syntax
Use the event name in methods like addEventListener()
, or set an event handler property.
js
addEventListener("activate", (event) => {});
onactivate = (event) => {};
Event type
A generic Event
with no added properties.
Examples
Log when an accelerometer is ready to measure
This example adds an event listener to log the activation of an Accelerometer
.
js
const acl = new Accelerometer({ frequency: 60 });
acl.addEventListener("activate", () => console.log("Ready to measure."));
acl.start();
Specifications
Specification |
---|
Generic Sensor API # sensor-onactivate |
Browser compatibility
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