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• 句法
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

只读 RTCRtpTransceiver property currentDirection is a string which indicates the current directionality of the transceiver. Its value is one of the strings defined by the RTCRtpTransceiverDirection 枚举。

You can examine and set the transceiver's preferred directionality using direction 特性。

句法

var direction = RTCRtpTransceiver.currentDirection
					

值

A DOMString whose value is one of the strings which are a member of the RTCRtpTransceiverDirection enumerated type.

RTCRtpTransceiverDirection type is an enumeration of string values. Each describes how the transceiver's associated RTCRtpSender and RTCRtpReceiver behave as shown in the table below.

值	RTCRtpSender behavior	RTCRtpReceiver behavior
"sendrecv"	Offers to send RTP data, and will do so if the other peer accepts the connection and at least one of the sender's encodings is active 1 .	Offers to receive RTP data, and does so if the other peer accepts.
"sendonly"	Offers to send RTP data, and will do so if the other peer accepts the connection and at least one of the sender's encodings is active 1 .	Does not offer to receive RTP data and will not do so.
"recvonly"	Does not offer to send RTP data, and will not do so.	Offers to receive RTP data, and will do so if the other peer offers.
"inactive"	Does not offer to send RTP data, and will not do so.	Does not offer to receive RTP data and will not do so.

[1] To determine if a sender has at least one active encoding, the 用户代理 gets its parameters using RTCRtpSender.getParameters() , then looks at the parameters' encodings property; if any of the listed encodings has its active 特性被设为 true , the sender has an active encoding.

规范

规范	状态	注释
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'RTCRtpTransceiver.currentDirection' in that specification.	候选推荐

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
currentDirection	Chrome 69	Edge 不支持 No	Firefox 59	IE 不支持 No	Opera 不支持 No	Safari ?	WebView Android 69	Chrome Android 69	Firefox Android 59	Opera Android 不支持 No	Safari iOS ?	Samsung Internet Android 10.0

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

• RTCRtpTransceiver.direction

元数据

• 最后修改： Mar 18, 2019

相关话题

1. WebRTC API
2. RTCRtpTransceiver
3. 特性

   1. currentDirection
   2. direction
   3. mid
   4. receiver
   5. sender
   6. stopped
4. 方法

   1. setCodecPreferences()
   2. stop()
5. 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. RTCSctpTransport
   18. RTCSessionDescription
   19. RTCStatsEvent
   20. RTCStatsReport
   21. RTCTrackEvent