RTCDTMFToneChangeEvent.tone

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句法
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规范
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The read-only property RTCDTMFToneChangeEvent.tone returns the DTMF character which has just begun to play, or an empty string ( "" ). if all queued tones have finished playing (that is, RTCDTMFSender.toneBuffer is empty).

句法

 var tone = dtmfToneChangeEvent.tone;

范例

This example establishes a handler for the tonechange event which updates an element to display the currently playing tone in its content, or, if all tones have played, the string "<none>".

dtmfSender.ontonechange = function( ev ) {
  let tone = ev.tone;
  if (tone === "") {
    tone = "<none>"
  }
  document.getElementById("playingTone").innerText = tone;
};

规范

规范	状态	注释
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'RTCDTMFToneChangeEvent.tone' 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
`tone`	Chrome 27	Edge 12	Firefox 52	IE No	Opera Yes	Safari ?	WebView Android 4.4	Chrome Android 27	Firefox Android 52	Opera Android Yes	Safari iOS ?	Samsung Internet Android 1.5

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句法

范例

规范

浏览器兼容性

图例

另请参阅

元数据

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