MediaError.message

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句法
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规范
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The read-only property MediaError.message 返回 DOMString which contains a human-readable string offering specific diagnostic details related to the error described by the MediaError object, or an empty string ( "" ) if no diagnostic information can be determined or provided.

句法

var errorMessage = mediaError.message;

值

A DOMString providing a detailed, specific explanation of what went wrong and possibly how it might be fixed. This is not simply a generic description of the MediaError.code property's value, but instead goes deeper into the specifics of this particular error and its circumstances. If no specific details are available, this string is empty.

范例

此范例创建 <audio> element, establishes an error handler for it, then lets the user click buttons to choose whether to assign a valid audio file or a missing file to the element's src attribute. The error handler simply outputs a message to a box onscreen describing the error, including both the code 和 message .

Only the relevant parts of the code are displayed; you can see the complete source code here .

The example creates an <audio> element and lets the user assign either a valid music file to it, or a link to a file which doesn't exist. This lets us see the behavior of the error event handler, which is received by an event handler we add to the <audio> element itself.

The error handler looks like this:

  audioElement.onerror = function() {
    let s = "";
    let err = audioElement.error;
    switch(err.code) {
      case MediaError.MEDIA_ERR_ABORTED:
        s += "The user canceled the audio.";
        break;
      case MediaError.MEDIA_ERR_NETWORK:
        s+= "A network error occurred while fetching the audio.";
        break;
      case MediaError.MEDIA_ERR_DECODE:
        s+= "An error occurred while decoding the audio.";
        break;
      case MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED:
        s+= "The audio is missing or is in a format not supported by your browser.";
        break;
      默认：
        s += "An unknown error occurred.";
        break;
    }
    let message = err.message;
    if (message && message.length) {
      s += " " + message;
    }
    displayErrorMessage("<strong>Error " + err.code + ":</strong> " + s + "<br>");
  };

This gets the MediaError object describing the error from the error property on the HTMLAudioElement representing the audio player. The error's code attribute is checked to determine a generic error message to display, and, if message is not empty, it's appended to provide additional details. Then the resulting text is output to the log.

结果

You can try out this example below, and can see the example in action outside this page here .

规范

规范	状态	注释
HTML 实时标准 The definition of 'MediaError.message' in that specification.	实时标准	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
`message`	Chrome 59	Edge ≤79	Firefox 52	IE ?	Opera 46	Safari ?	WebView Android 59	Chrome Android 59	Firefox Android 52	Opera Android 43	Safari iOS ?	Samsung Internet Android 7.0

图例

完整支持
兼容性未知 ?

另请参阅

<video> and <audio>
The interface defining it, MediaError .

元数据

最后修改： 2019 年 3 月 23 日

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句法

值

范例

结果

规范

浏览器兼容性

图例

另请参阅

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