RTCDTMFToneChangeEvent

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 Event , this interface offers the following:

RTCDTMFToneChangeEvent.tone 只读
A 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 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 Event . 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 Comment
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

更新 GitHub 上的兼容性数据
Desktop Mobile
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

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另请参阅