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AmbientLightSensor.illuminance

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

The illuminance property of the AmbientLightSensor interface returns the current light level in lux of the ambient light level 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. The Feature-Policy HTTP header article contains implementation instructions.

Value

A Number indicating the current light level in lux.

Examples

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-reading-attribute

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
illuminance
56
In Chrome 79, this method stopped returning floats and returned integers to avoid fingerprinting.
79
No
No
43
In Opera 66, this method stopped returning floats and returned integers to avoid fingerprinting.
No
No
56
In Chrome for Android 79, this method stopped returning floats and returned integers to avoid fingerprinting.
No
43
In Opera for Android 57, this method stopped returning floats and returned integers to avoid fingerprinting.
No
No

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

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Last Updated 2022-04-27T09:33:08Z