RTCDtlsTransport.state

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state 只读特性在 RTCDtlsTransport interface provides information which describes a Datagram Transport Layer Security ( DTLS ) transport state.

句法

let myState = dtlsTransport.state;

值

A string whose value is taken from the RTCDtlsTransportState enumerated type. Its value is one of the following:

new
connecting
connected
closed: The transport has been closed intentionally as the result of receipt of a close_notify alert, or calling RTCPeerConnection.close() .
failed

范例

This example presents a function, tallySenders() , which iterates over an RTCPeerConnection 's RTCRtpSender s, tallying up how many of them are in various states. The function returns an object containing properties whose values indicate how many of the senders are in each state.

let pc = new RTCPeerConnection({ bundlePolicy: "max-bundle" });
/* ... */
function tallySenders(pc) {
  let results = {
    transportMissing: 0,
    connectionPending: 0,
    connected: 0,
    closed: 0,
    failed: 0,
    unknown: 0
  };
  let senderList = pc.getSenders();
  senderList.forEach(sender => {
    let transport = sender.transport;
    if (!transport) {
      results.transportMissing++;
    } else {
      switch(transport.state) {
        case "new":
        case "connecting":
          results.connectionPending++;
          break;
       case "connected":
          results.connected++;
          break;
       case "closed":
          results.closed++;
          break;
       case "failed":
          results.failed++;
          break;
       默认：
          results.unknown++;
          break;
      }
    }
  });
  return results;
}

Note that in this code, the new and connecting states are being treated as a single connectionPending status in the returned object.

规范

规范	状态	注释
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'RTCDtlsTransport.state' in that specification.	候选推荐	初始定义。

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
`state`	Chrome 72	Edge 12	Firefox No 不支持 No 见 bug 1307996 .	IE No	Opera 60	Safari No	WebView Android 72	Chrome Android 72	Firefox Android No 不支持 No 见 bug 1307996 .	Opera Android 50	Safari iOS No	Samsung Internet Android 11.0

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