RTCPeerConnection: datachannel event

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A datachannel event is sent to an RTCPeerConnection instance when an RTCDataChannel has been added to the connection, as a result of the remote peer calling RTCPeerConnection.createDataChannel() .

注意： This event is not dispatched when the local end of the connection creates the channel.

冒泡	No
可取消	No
接口	`RTCDataChannelEvent`
事件处理程序特性	`ondatachannel`

范例

This example sets up a function that handles datachannel events by gathering the information needed to communicate with the newly added RTCDataChannel and by adding event handlers for the events that occur on that channel.

pc.addEventListener("datachannel", ev => {
  receiveChannel = ev.channel;
  receiveChannel.onmessage = myHandleMessage;
  receiveChannel.onopen = myHandleOpen;
  receiveChannel.onclose = myHandleClose;
}, false);

receiveChannel is set to the value of the event's channel property, which specifies the RTCDataChannel object representing the data channel linking the remote peer to the local one.

This same code can also instead use the RTCPeerConnection 接口的 ondatachannel event handler property, like this:

pc.ondatachannel = ev => {
  receiveChannel = ev.channel;
  receiveChannel.onmessage = myHandleMessage;
  receiveChannel.onopen = myHandleOpen;
  receiveChannel.onclose = myHandleClose;
}

规范

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

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
`datachannel` event	Chrome 25	Edge ≤18	Firefox 22	IE No	Opera 43	Safari 11	WebView Android Yes	Chrome Android 25	Firefox Android 44	Opera Android 43	Safari iOS ?	Samsung Internet Android 6.0

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