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• 句法
• 规范
• 浏览器兼容性
• 相关话题

label readonlyinline property of the MediaDeviceInfo interface returns a DOMString , that is a label describing this device (for example "External USB Webcam"). Only available during active MediaStream use, or when persistent permissions have been granted.

句法

var label = MediaDeviceInfo.label;
					

值

A DOMString which describes the media device. For security reasons, the label is always an empty string ( "" ) if the user has not obtained permission to use at least one media device, either by starting a stream from the microphone or camera, or by persistent permissions being granted.

规范

规范	状态	注释
媒体捕获和流 The definition of 'label' in that specification.	候选推荐	初始定义。

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
label	Chrome 55 注意事项 55 注意事项 For earlier versions, this interface is available through the adapter.js polyfill	Edge 12	Firefox 39	IE 不支持 No	Opera 不支持 No 注意事项 No 注意事项 This property can be used in Opera by using the adapter.js polyfill.	Safari 不支持 No	WebView Android 55 注意事项 55 注意事项 For earlier versions, this interface is available through the adapter.js polyfill	Chrome Android 55 注意事项 55 注意事项 For earlier versions, this interface is available through the adapter.js polyfill	Firefox Android 39	Opera Android 不支持 No 注意事项 No 注意事项 This property can be used in Opera by using the adapter.js polyfill.	Safari iOS 不支持 No	Samsung Internet Android 6.0 注意事项 6.0 注意事项 For earlier versions, this interface is available through the adapter.js polyfill

图例

完整支持

完整支持

不支持

不支持

见实现注意事项。

元数据

• 最后修改： 2019 年 3 月 23 日

相关话题

1. MediaDeviceInfo
2. 特性

   1. deviceId
   2. groupId
   3. kind
   4. label