RTCDTMFToneChangeEvent: tone property
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).
Value
A string with the DTML character playing, or the empty string.
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>".
js
dtmfSender.ontonechange = (ev) => {
let tone = ev.tone;
if (tone === "") {
tone = "<none>";
}
document.getElementById("playingTone").innerText = tone;
};
Specifications
Specification |
---|
WebRTC: Real-Time Communication in Browsers # dom-rtcdtmftonechangeevent-tone |
Browser compatibility
BCD tables only load in the browser