RTCDTMFToneChangeEvent

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特性
构造函数
方法
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RTCDTMFToneChangeEvent interface represents events sent to indicate that DTMF tones have started or finished playing. This interface is used by the tonechange 事件。

特性

In addition to the properties of 事件 , this interface offers the following:

RTCDTMFToneChangeEvent.tone 只读: DOMString specifying the tone which has begun playing, or an empty string ( "" ) if the previous tone has finished playing.

构造函数

RTCDTMFToneChangeEvent(): 返回新的 RTCDTMFToneChangeEvent . It takes two parameters, the first being a DOMString representing the type of the event (always "tonechange" ); the second a dictionary containing the initial state of the properties of the event.

方法

Supports the methods defined in 事件 . There are no additional methods.

范例

This snippet is derived loosely from the full, working example you'll find in When a tone finishes playing in Using DTMF with WebRTC . It appends each tone to a display box as it's played, and, once all tones have been sent, re-enabled a previously-disabled "Send" button, allowing the next DMTF string to be entered.

dtmfSender.addEventListener("change", function(event) {
  if (event.tone !== "") {
    dialStringBox.innerText += event.tone;
  } else {
    sendDTMFButton.disabled = false;
  }
}, false);

规范

规范	状态	注释
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'RTCDTMFToneChangeEvent' 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
`RTCDTMFToneChangeEvent`	Chrome 27	Edge ≤18	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
`RTCDTMFToneChangeEvent()` 构造函数	Chrome 27	Edge ≤18	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
`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

图例

完整支持
不支持
兼容性未知 ?

另请参阅

WebRTC
Its usual target: RTCDTMFSender .

元数据

最后修改： 2019 年 3 月 23 日

在此页

特性

构造函数

方法

范例

规范

浏览器兼容性

图例

另请参阅

相关话题