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

The AmbinentLightSensor() constructor creates a new AmbientLightSensor object, which returns the current light level or illuminance of the ambient light around the hosting device.

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. See Feature-Policy for implementation instructions.


var ambientLightSensor = new AmbientLightSensor(options)


options Optional
Currently only one option is supported:
  • frequency: The desired number of times per second a sample should be taken, meaning the number of times per second that sensor.onreading will be called. A whole number or decimal may be used, the latter for frequencies less than a second. The actual reading frequency depends device hardware and consequently may be less than requested.


Specification Status Comment
Generic Sensor API Candidate Recommendation Defines sensors in general.
Ambient Light Sensor
The definition of 'AmbientLightSensor()' in that specification.
Candidate Recommendation

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
AmbientLightSensor() constructorChrome Full support 56Edge Full support 79Firefox No support NoIE No support NoOpera Full support 43Safari No support NoWebView Android No support NoChrome Android Full support 56Firefox Android No support NoOpera Android Full support 43Safari iOS No support NoSamsung Internet Android No support No


Full support  
Full support
No support  
No support