AmbientLightSensor

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

The AmbientLightSensor interface of the Sensor APIs returns the current light level or illuminance of the ambient light around the hosting device.

To use this sensor, the user must grant permission to the 'ambient-light-sensor' device sensor through the Permissions API.

If a feature policy blocks use of a feature it is because your code is inconsistent with the policies set on your server. This is not something that would ever be shown to a user. The Feature-Policy HTTP header article contains implementation instructions.

EventTarget Sensor AmbientLightSensor

Constructor

AmbientLightSensor() Experimental

Creates a new AmbientLightSensor object.

Properties

AmbientLightSensor.illuminance Experimental

Returns the current light level in lux of the ambient light level around the hosting device.

Methods

AmbientLightSensor doesn't have own methods. However, it inherits methods from its parent interfaces, Sensor and EventTarget.

Events

AmbientLightSensor doesn't have own events. However, it inherits events from its parent interface, Sensor.

Example

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-interface

Browser compatibility

BCD tables only load in the browser