The value property provides the current level of the ambient light.
var light = instanceOfDeviceLightEvent.value;
A positive number representing a light intensity expressed in lux.
| Specification | Status | Comment |
|---|---|---|
| Ambient Light Sensor The definition of 'Ambient Light Events' in that specification. | Editor's Draft | Initial definition |
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | No support | (Yes) | 22.0 (22.0)[1] | No support | No support | No support |
| Feature | Android Webview | Chrome for Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
| Basic support | No support | No support | (Yes) | 15.0 (15.0)[1] | No support | No support | No support |
[1] The devicelight event is implemented and preference enabled by default in Firefox Mobile for Android (15.0) and in Firefox OS (B2G). Starting with Gecko 22.0 (Firefox 22.0 / Thunderbird 22.0 / SeaMonkey 2.19) a desktop implementation for Mac OS X is also available. Support for Windows 7 is in progress (see bug 754199).
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https://developer.mozilla.org/en-US/docs/Web/API/DeviceLightEvent/value