RTCDTMFSender: tonechange event

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tonechange event is sent to an RTCDTMFSender 通过 WebRTC API to indicate when DTMF tones previously queued for sending (by calling RTCDTMFSender.insertDTMF() ) begin and end.

冒泡	No
可取消	No
接口	`RTCDTMFToneChangeEvent`
事件处理程序特性	`ontonechange`

To determine what tone started playing, or if a tone stopped playing, check the value of the event's tone 特性。

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>".

This can be done using addEventListener() :

dtmfSender.addEventListener("tonechange", ev => {
  let tone = ev.tone;
  if (tone === "") {
    tone = "<none>";
  }
  document.getElementById("playingTone").innerText = tone;
}, false);

You can also just set the ontonechange event handler property directly:

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 'tonechange' in that specification.	候选推荐	Definition for the WebRTC API

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
`tonechange` event	Chrome 27	Edge ≤79	Firefox 52	IE No	Opera Yes	Safari ?	WebView Android Yes	Chrome Android 27	Firefox Android 52	Opera Android Yes	Safari iOS ?	Samsung Internet Android 1.5

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完整支持
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兼容性未知 ?

元数据

最后修改： Apr 22, 2019

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