DeviceLightEvent

这是一个实验中的功能
此功能某些浏览器尚在开发中,请参考浏览器兼容性表格以得到在不同浏览器中适合使用的前缀。由于该功能对应的标准文档可能被重新修订,所以在未来版本的浏览器中该功能的语法和行为可能随之改变。

DeviceLightEvent 为 Web 开发人员提供来自光传感器或类似设备的、关于附近环境光水平的信息。例如,基于当前环境光水平调节屏幕的亮度,以便节省电量或提供更好的阅读性。

属性

DeviceLightEvent.value
环境光的亮度,单位为 lux

示例

window.addEventListener('devicelight', function(event) {
  console.log(event.value);
});

规范

规范 状态 备注
Ambient Light Sensor
Ambient Light Events
Candidate Recommendation Initial specification

浏览器兼容性

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
DeviceLightEvent
ExperimentalNon-standard
Chrome No support NoEdge No support ≤18 — 79Firefox Full support 62
Notes Disabled
Full support 62
Notes Disabled
Notes See bug 1462308.
Disabled From version 62: this feature is behind the device.sensors.ambientLight.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
No support 22 — 61
Notes
Notes Not supported for MacBook with Touch Bar and Windows 7 (see bug 754199).
IE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoFirefox Android Full support 62
Notes Disabled
Full support 62
Notes Disabled
Notes See bug 1462308.
Disabled From version 62: this feature is behind the device.sensors.ambientLight.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
No support 15 — 61
Opera Android No support NoSafari iOS No support NoSamsung Internet Android No support No
value
ExperimentalNon-standard
Chrome No support NoEdge No support 13 — 79Firefox Full support 62
Notes Disabled
Full support 62
Notes Disabled
Notes See bug 1462308.
Disabled From version 62: this feature is behind the device.sensors.ambientLight.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
No support 22 — 61
Notes
Notes Not supported for MacBook with Touch Bar and Windows 7 (see bug 754199).
IE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoFirefox Android Full support 62
Notes Disabled
Full support 62
Notes Disabled
Notes See bug 1462308.
Disabled From version 62: this feature is behind the device.sensors.ambientLight.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
No support 15 — 61
Opera Android No support NoSafari iOS No support NoSamsung Internet Android No support No

Legend

Full support  
Full support
No support  
No support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.
See implementation notes.
See implementation notes.
User must explicitly enable this feature.
User must explicitly enable this feature.

参见