Simple Ambient Light Sensor Demo

ambient-light-simple-demo.js

if ( 'AmbientLightSensor' in window ) {
    const sensor = new AmbientLightSensor();
    sensor.onreading = () => {
        if ( sensor.illuminance < 20) {
           element.style.setProperty('--bg', 'black’);
        } else {
           element.style.setProperty('--bg', 'blue’);
        }
   };
   sensor.start();
}