MediaRecorder.onstart event handler (part of the MediaRecorder API ) handles the start event, allowing you to run code in response to media recording being started by a MediaRecorder .

start event is thrown as a result of the MediaRecorder.start() method being invoked. At this point, the data starts being gathered into a Blob .

句法

MediaRecorder.onstart = function(event) { ... }
MediaRecorder.addEventListener('start', function(event) { ... })
					

范例

...
  record.onclick = function() {
    mediaRecorder.start();
    console.log("recorder started");
  }
  mediaRecorder.onstart = function() {
    // do something in response to
    // recording being started
  }
...
					

特性

None.

规范

规范 状态 注释
MediaStream 录制
The definition of 'MediaRecorder.onstart' in that specification.
工作草案 初始定义

浏览器兼容性

The compatibility table in 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
onstart Chrome 49 Edge 79 Firefox 25 IE No Opera 36 Safari No WebView Android 49 Chrome Android 49 Firefox Android 25 Opera Android 36 Safari iOS No Samsung Internet Android 5.0

图例

完整支持

完整支持

不支持

不支持

另请参阅

元数据

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