RTCErrorEvent.error

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只读 RTCErrorEvent property error contains an RTCError object describing the details of the error which the event is announcing.

句法

let errorInfo = rtcErrorEvent.error;

值

RTCError object whose properties provide details about the error which has occurred in the context of a WebRTC operation. Since RTCError is based upon DOMException , it includes those properties. Additional properties defined by RTCError 是：

errorDetail 只读: DOMString specifying the WebRTC-specific error code identifying the type of error that occurred.
receivedAlert 只读: An unsigned long integer value indicating the fatal DTLS error which was received from the network. Only valid if the errorDetail 字符串是 dtls-failure 。若 null , no DTLS error was received.
sctpCauseCode 只读: 若 errorDetail is sctp-failure , this property is a long integer specifying the SCTP cause code indicating the cause of the failed SCTP negotiation. null if the error isn't an SCTP error.
sdpLineNumber 只读: 若 errorDetail is sdp-syntax-error , this property is a long integer identifying the line number of the SDP on which the syntax error occurred. null if the error isn't an SDP syntax error.
sentAlert 只读: 若 errorDetail is dtls-failure , this property is an unsigned long integer indicating the fatal DTLS error that was sent out by this device. If null , no DTLS error was transmitted.

所有 RTCError objects have their 名称 设为 OperationError .

范例

In this example, a handler is established for an RTCDataChannel 's error 事件。

dataChannel.addEventListener("error", (event) => {
  let error = event.error;
  if (error.errorDetail === "sdp-syntax-error") {
    let errLine = error.sdpLineNumber;
    let errMessage = error.message;
    let alertMessage = `A syntax error occurred interpreting line ${errLine} of the SDP: ${errMessage}`;
    showMyAlertMessage("Data Channel Error", alertMessage);
  } else {
    terminateMyConnection();
  }
});

If the error is an SDP syntax error—indicated by its errorDetail property being sdp-syntax-error —, a message string is constructed to present the error message and the line number within the SDP at which the error occurred. This message is then displayed using a function called showMyAlertMessage() , which stands in for whatever output mechanism this code might use.

Any other error is treated as terminal, causing a terminateMyConnection() function to be called.

The above example uses addEventListener() to add the handler for error events. You can also use the RTCDataChannel 对象的 onerror event handler property, like this:

dataChannel.onerror = (event) => {
  let error = event.error;
  /* and so forth */
};

规范

规范	状态	注释
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'RTCErrorEvent.error' 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
`error`	Chrome ?	Edge ?	Firefox ?	IE No	Opera ?	Safari ?	WebView Android ?	Chrome Android ?	Firefox Android ?	Opera Android ?	Safari iOS 6	Samsung Internet Android ?

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完整支持
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兼容性未知 ?

元数据

最后修改： Aug 17, 2020

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