在此页

• 值
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

The optional property sdpMLineIndex 在 RTCIceCandidateInit dictionary specifies the value of the RTCIceCandidate 对象的 sdpMLineIndex 特性。

值

A number containing a 0-based index into the set of m-lines providing media descriptions, indicating which media source is associated with the candidate, or null if no such association is available.

注意： Attempting to add a candidate (using addIceCandidate() ) that has a value of null for either sdpMid or sdpMLineIndex will throw a TypeError 异常。

范例

...

规范

规范	状态	注释
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'RTCIceCandidateInit.sdpMLineIndex' 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
sdpMLineIndex	Chrome Yes	Edge ≤18	Firefox 22	IE No	Opera Yes	Safari ?	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS ?	Samsung Internet Android Yes

图例

完整支持

完整支持

不支持

不支持

兼容性未知 ?

兼容性未知

另请参阅

• WebRTC API
• RTCIceCandidate.sdpMLineIndex
• RTCPeerConnection.addIceCandidate()
• icecandidate
• Lifetime of a WebRTC session

元数据

• 最后修改： Mar 18, 2019

相关话题

1. WebRTC API
2. RTCIceCandidateInit
3. 特性

   1. candidate
   2. sdpMid
   3. sdpMLineIndex
   4. usernameFragment
4. Related pages for WebRTC

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