AmbientLightSensor

The AmbientLightSensor interface of the 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. See Feature-Policy for implementation instructions.

Constructor

AmbientLightSensor.AmbientLightSensor()
Creates a new AmbientLightSensor object.

Properties

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

Example

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

Specifications

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

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support

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AmbientLightSensor() constructor

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illuminance

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FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support

54

691

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AmbientLightSensor() constructor

54

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illuminance

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1. Based on Generic Sensor API.

Document Tags and Contributors

Contributors to this page: jpmedley, connorshea, fscholz, RockoDev, david_ross, Joel-Kornbluh
Last updated by: jpmedley,