RTCDTMFToneChangeEvent.tone

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).

Syntax

 var tone = RTCDTMFToneChangeEvent.tone;

Example

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 = "&lt;none&gt;"
  }
  document.getElementById("playingTone").innerText = tone;
};

Specifications

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

Feature	Chrome	Edge	Firefox (Gecko)	Internet Explorer	Opera	Safari
Basic support	(Yes)	?	52 (52)	No support	?	?

Feature	Android	Chrome for Android	Edge	Firefox Mobile (Gecko)	IE Mobile	Opera Mobile	Safari Mobile
Basic support	?	?	?	52.0 (52)	No support	?	?

Syntax

Example

Specifications

Browser compatibility

See also

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