在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

这是 实验性技术
检查 浏览器兼容性表格 要小心谨慎在生产中使用这之前。

RTCDataChannel.onbufferedamountlow property is an EventHandler which specifies a function the browser calls when the bufferedamountlow event is sent to the RTCDataChannel . This event, which is represented by a simple 事件 object, is sent when the amount of data buffered to be sent falls to or below the threshold specified by the channel's bufferedAmountLowThreshold .

见 Buffering in Using WebRTC data channels to learn more about how to work with the data channel buffer.

句法

RTCDataChannel.onbufferedamountlow = function;
					

值

A function which the browser will call to handle the bufferedamountlow event. This function receives as its only input parameter a simple 事件 object representing the event which has occurred.

范例

This example responds to the bufferedamountlow event by fetching up to 64kB of a file represented by an object source and calling RTCDataChannel.send() to queue up the retrieved data for sending on the data channel.

pc = new RTCPeerConnection();
dc = pc.createDataChannel("SendFile");
/* ... */
dc.onbufferedamountlow = function() {
  if (source.position <= source.length) {
    dc.send(source.readFile(65536));
  }
}
					

规范

规范	状态	注释
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'RTCDataChannel.onbufferedamountlow' 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
onbufferedamountlow	Chrome 57 57 默认为 rtcpMuxPolicy is require .	Edge ≤79 ≤79 默认为 rtcpMuxPolicy is require .	Firefox Yes	IE No	Opera 44 44 默认为 rtcpMuxPolicy is require .	Safari Yes	WebView Android 57 57 默认为 rtcpMuxPolicy is require .	Chrome Android 57 57 默认为 rtcpMuxPolicy is require .	Firefox Android Yes	Opera Android 43 43 默认为 rtcpMuxPolicy is require .	Safari iOS No	Samsung Internet Android 7.0 7.0 默认为 rtcpMuxPolicy is require .

图例

完整支持

完整支持

不支持

不支持

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

见实现注意事项。

元数据

• 最后修改： Apr 16, 2020

相关话题

1. WebRTC API
2. RTCDataChannel
3. 特性

   1. binaryType
   2. bufferedAmount
   3. bufferedAmountLowThreshold
   4. id
   5. label
   6. maxPacketLifeTime
   7. maxRetransmits
   8. negotiated
   9. onbufferedamountlow
   10. onclose
   11. onclosing
   12. onerror
   13. onmessage
   14. onopen
   15. ordered
   16. 协议
   17. readyState
   18. reliable
   19. stream
4. 方法

   1. close()
   2. send()
5. 继承：

   1. EventTarget
6. Related pages for WebRTC

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