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AmbientLightSensor: illuminance property

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.

Value

A Number indicating the current light level in lux.

Examples

js

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

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