在此页

• 句法
• 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。

只读 RTCDataChannel property label 返回 DOMString containing a name describing the data channel. These labels are not required to be unique.

You may use the label as you wish; you could use it to identify all the channels that are being used for the same purpose, by giving them all the same name. Or you could give each channel a unique label for tracking purposes. It's entirely up to the design decisions made when building your site or app.

A unique ID can be found in the id 特性。

A data channel's label is set when the channel is created by calling RTCPeerConnection.createDataChannel() . It cannot be changed after that.

句法

var name = aDataChannel.label;
					

值

A string identifier assigned by the Web site or app when the data channel was created, as specified when RTCPeerConnection.createDataChannel() was called to create the channel.

范例

This sample creates a data channel on an RTCPeerConnection , then, some time later, sets the content of a UI element to display the channel's name.

var pc = new RTCPeerConnection();
var dc = pc.createDataChannel("my channel");
/* ... */

document.getElementById("channel-name").innerHTML =
          "<span class='channelName'>" + dc.label + "</span>";
					

规范

规范	状态	注释
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'RTCDataChannel.label' in that specification.	候选推荐	最初的规范。

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 56	Edge ≤79	Firefox Yes	IE No	Opera 43	Safari No	WebView Android 56	Chrome Android 56	Firefox Android Yes	Opera Android 43	Safari iOS No	Samsung Internet Android 6.0

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。

另请参阅

• WebRTC
• RTCDataChannel
• RTCDataChannel.id
• RTCPeerConnection.createDataChannel()

元数据

• 最后修改： 2020 年 1 月 22 日

相关话题

1. WebRTC API
2. RTCDataChannel
3. 特性

   1. binaryType
   2. bufferedAmount
   3. bufferedAmountLowThreshold
   4. id
   5. label
   6. maxPacketLifeTime
   7. maxRetransmits
   8. negotiated
   9. onbufferedamountlow
   10. onclose
   11. onclosing
   12. onerror
   13. onmessage
   14. onopen
   15. ordered
   16. 协议
   17. readyState
   18. reliable
   19. stream
4. 方法

   1. close()
   2. send()
5. 继承：

   1. EventTarget
6. Related pages for WebRTC

   1. MediaDevices.getUserMedia()
   2. Navigator.mediaDevices
   3. RTCCertificate
   4. RTCDTMFSender
   5. RTCDTMFToneChangeEvent
   6. RTCDataChannelEvent
   7. RTCDtlsTransport
   8. RTCErrorEvent
   9. RTCIceCandidate
   10. RTCIceTransport
   11. RTCPeerConnection
   12. RTCPeerConnectionIceErrorEvent
   13. RTCPeerConnectionIceEvent
   14. RTCRtpReceiver
   15. RTCRtpSender
   16. RTCRtpTransceiver
   17. RTCSctpTransport
   18. RTCSessionDescription
   19. RTCStatsEvent
   20. RTCStatsReport
   21. RTCTrackEvent