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• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

The read-only property RTCPeerConnection.currentLocalDescription 返回 RTCSessionDescription object describing the local end of the connection as it was most recently successfully negotiated since the last time the RTCPeerConnection finished negotiating and connecting to a remote peer. Also included is a list of any ICE candidates that may already have been generated by the ICE agent since the offer or answer represented by the description was first instantiated.

To change the currentLocalDescription ，调用 RTCPeerConnection.setLocalDescription() , which triggers a series of events which leads to this value being set. For details on what exactly happens and why the change isn't necessarily instantaneous, see Pending and current descriptions in WebRTC connectivity .

不像 RTCPeerConnection.localDescription , this value represents the actual current state of the local end of the connection; localDescription may specify a description which the connection is currently in the process of switching over to.

句法

sessionDescription = RTCPeerConnection.currentLocalDescription;
					

返回值

The current description of the local end of the connection, if one has been set. If none has been successfully set, this value is null .

范例

This example looks at the currentLocalDescription and displays an alert containing the RTCSessionDescription 对象的 type and sdp 字段。

var pc = new RTCPeerConnection();
…
var sd = pc.currentLocalDescription;
if (sd) {
  alert("Local session: type='" +
        sd.type + "'; sdp description='" +
        sd.sdp + "'");
}
else {
  alert("No local session yet.");
}
					

规范

规范	状态	注释
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'RTCPeerConnection.currentLocalDescription' 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
currentLocalDescription	Chrome 70	Edge ≤18	Firefox 22	IE No	Opera 43 43 Promise-based version. 不支持 37 — 43	Safari 11	WebView Android 70	Chrome Android 70	Firefox Android 44	Opera Android 43 43 Promise-based version. 不支持 37 — 43	Safari iOS Yes	Samsung Internet Android 6.0

图例

完整支持

完整支持

不支持

不支持

见实现注意事项。

The addition of currentLocalDescription and pendingLocalDescription to the WebRTC spec is relatively recent. In browsers which don't support them, just use localDescription .

另请参阅

• RTCPeerConnection.setLocalDescription() , RTCPeerConnection.pendingLocalDescription , RTCPeerConnection.localDescription
• RTCPeerConnection.setRemoteDescription() , RTCPeerConnection.remoteDescription , RTCPeerConnection.pendingRemoteDescription , RTCPeerConnection.currentRemoteDescription
• WebRTC

元数据

• 最后修改： Jan 24, 2020

相关话题

1. WebRTC API
2. WebRTC Guides

   1. WebRTC Architecture
   2. WebRTC Basics
   3. WebRTC Protocols
   4. Dealing with connectivity
   5. Overview of WebRTC interfaces
   6. Lifetime of a WebRTC Session
   7. Using data channels
3. WebRTC Tutorials

   1. Interoperability with adapter.js
   2. Taking still photos from the camera
   3. A simple data channel example
4. 接口

   1. RTCPeerConnection
   2. RTCSessionDescription
   3. RTCIceCandidate
   4. RTCPeerConnectionIceEvent
   5. MessageEvent
   6. MediaStream
   7. RTCStatsReport
   8. RTCIdentityEvent
   9. RTCIdentityErrorEvent
   10. MediaStreamEvent
   11. MediaStreamTrack
   12. MediaDevices
5. 文档编制：
6. 有用清单

   1. Pages tagged "WebRTC"
7. 贡献

   1. WebRTC doc status
   2. MDN 工程