AmbientLightSensor

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 insecure contexts (HTTPS), in some or allsupporting browsers.

Experimental:This is anexperimental technology
Check theBrowser compatibility table carefully before using this in production.

TheAmbientLightSensor interface of theSensor 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 thePermissions API.

This feature may be blocked by aPermissions Policy set on your server.

Constructor

AmbientLightSensor()Experimental: Creates a newAmbientLightSensor object.

Instance properties

AmbientLightSensor.illuminanceRead onlyExperimental: Returns the current light level in lux of the ambient light level around the hosting device.

Instance methods

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

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();}