AmbientLightSensor：illuminance 属性
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
AmbientLightSensor 接口的 illuminance 只读属性返回宿主设备周围环境光的当前光照强度，单位为 lux（勒克斯）。
值
一个 Number，表示当前的光照强度，单位为勒克斯（lux）。
示例
js
if ("AmbientLightSensor" in window) {
const sensor = new AmbientLightSensor();
sensor.addEventListener("reading", (event) => {
console.log("当前光照强度：", sensor.illuminance);
});
sensor.addEventListener("error", (event) => {
console.log(event.error.name, event.error.message);
});
sensor.start();
}
规范
| Specification |
|---|
| Ambient Light Sensor # ambient-light-sensor-reading-attribute |
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