RTCDTMFToneChangeEvent

The RTCDTMFToneChangeEvent interface represents events sent to indicate that DTMF tones have started or finished playing. This interface is used by the tonechange event.

Properties

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

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

Constructors

RTCDTMFToneChangeEvent()
Returns a new 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.

Methods

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

Examples

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);

Specifications

Specification Status Comment
WebRTC 1.0: Real-time Communication Between Browsers
The definition of 'RTCDTMFToneChangeEvent' in that specification.
Candidate Recommendation Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic supportChrome Full support YesEdge Full support YesFirefox Full support 52IE No support NoOpera Full support YesSafari ? WebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support 52Opera Android Full support YesSafari iOS ? Samsung Internet Android Full support Yes
toneChrome Full support YesEdge Full support 12Firefox Full support 52IE No support NoOpera Full support YesSafari ? WebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support 52Opera Android Full support YesSafari iOS ? Samsung Internet Android Full support Yes
RTCDTMFToneChangeEvent()Chrome Full support YesEdge Full support YesFirefox Full support 52IE No support NoOpera Full support YesSafari ? WebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support 52Opera Android Full support YesSafari iOS ? Samsung Internet Android Full support Yes

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown

See also

Document Tags and Contributors

Contributors to this page: fscholz, myf, Sheppy
Last updated by: fscholz,