AmbientLightSensor: illuminance property

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The illuminance property of the AmbientLightSensor interface returns the current light level in lux of the ambient light level around the hosting device.

Value

A Number indicating the current light level in lux.

Examples

if ("AmbientLightSensor" in window) {
  const sensor = new AmbientLightSensor();
  sensor.addEventListener("reading", (event) => {
    console.log("Current light level:", sensor.illuminance);
  });
  sensor.addEventListener("error", (event) => {
    console.log(event.error.name, event.error.message);
  });
  sensor.start();
}

Specifications

Specification
Ambient Light Sensor # ambient-light-sensor-reading-attribute

Browser compatibility

BCD tables only load in the browser