connectionstatechange
event is sent to the
ontrack
event handler on an
RTCPeerConnection
object after a new track has been added to an
RTCRtpReceiver
which is part of the connection.
The new connection state can be found in
connectionState
, and is one of the strings in the
RTCPeerConnectionState
enumerated type.
| 冒泡 | No |
|---|---|
| 可取消 | No |
| 接口 |
事件
|
| Event handler |
onconnectionstatechange
|
For an
RTCPeerConnection
,
pc
, this example sets up a handler for
connectionstatechange
messages to handle changes to the connectivity of the WebRTC session. It simply calls an app-defined function called
setOnlineStatus()
to update a status display.
pc.onconnectionstatechange = ev => {
switch(pc.connectionState) {
case "new":
case "checking":
setOnlineStatus("Connecting...");
break;
case "connected":
setOnlineStatus("Online");
break;
case "disconnected":
setOnlineStatus("Disconnecting...");
break;
case "closed":
setOnlineStatus("Offline");
break;
case "failed":
setOnlineStatus("Error");
break;
默认：
setOnlineStatus("Unknown");
break;
}
}
You can also create a handler for
connectionstatechange
通过使用
addEventListener()
:
pc.addEventListener("connectionstatechange", ev => {
switch(pc.connectionState) {
/* ... */
}
}, false);
| 规范 | 状态 | 注释 |
|---|---|---|
|
WebRTC 1.0: Real-time Communication Between Browsers
The definition of 'connectionstatechange' in that specification. |
候选推荐 | 最初的规范。 |
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