在此页

• 特性
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

这是 实验性技术
检查 浏览器兼容性表格 要小心谨慎在生产中使用这之前。

DeviceLightEvent provides web developers with information from photo sensors or similiar detectors about ambient light levels near the device. For example this may be useful to adjust the screen's brightness based on the current ambient light level in order to save energy or provide better readability.

特性

DeviceLightEvent.value

The level of the ambient light in lux .

范例

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

规范

No specification.

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
DeviceLightEvent 非标	Chrome No	Edge ≤18 — 79	Firefox 62 Disabled 62 Disabled 见 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. 不支持 22 — 61 Not supported for MacBook with Touch Bar and Windows 7 (see bug 754199 ).	IE No	Opera No	Safari No	WebView Android No	Chrome Android No	Firefox Android 62 Disabled 62 Disabled 见 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. 不支持 15 — 61	Opera Android No	Safari iOS No	Samsung Internet Android No
value 非标	Chrome No	Edge 13 — 79	Firefox 62 Disabled 62 Disabled 见 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. 不支持 22 — 61 Not supported for MacBook with Touch Bar and Windows 7 (see bug 754199 ).	IE No	Opera No	Safari No	WebView Android No	Chrome Android No	Firefox Android 62 Disabled 62 Disabled 见 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. 不支持 15 — 61	Opera Android No	Safari iOS No	Samsung Internet Android No

图例

完整支持

完整支持

不支持

不支持

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

非标。预期跨浏览器支持较差。

非标。预期跨浏览器支持较差。

见实现注意事项。

用户必须明确启用此特征。

用户必须明确启用此特征。

另请参阅

• devicelight
• Using Light Events

元数据

• 最后修改： Aug 28, 2019

相关话题

1. 环境光事件
2. DeviceLightEvent
3. 特性

   1. value
4. 继承：

   1. 事件
5. Related pages for Ambient Light Events

   1. Window.ondevicelight