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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.

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

Constructor

AmbientLightSensor() Experimental: Creates a new AmbientLightSensor object.

Instance properties

AmbientLightSensor.illuminance Experimental: 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 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

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`AmbientLightSensor`	56	79	No	No	43	No	No	56	No	No	No	No
`AmbientLightSensor`	56	79	No	No	43	No	No	56	No	No	No	No
`illuminance`	56 In Chrome 79, this method stopped returning floats and returned integers to avoid fingerprinting.	79 In Edge 79, this method stopped returning floats and returned integers to avoid fingerprinting.	No	No	43 In Opera 66, this method stopped returning floats and returned integers to avoid fingerprinting.	No	No	56 In Chrome 79, this method stopped returning floats and returned integers to avoid fingerprinting.	No	No	No	No

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https://developer.mozilla.org/en-US/docs/Web/API/AmbientLightSensor