MDN wants to learn about developers like you:


This page is not complete.

The ontonechange property of the RTCDTMFSender interface is used to set the event handler for the tonechange event, which is sent to the RTCDTMFSender each time a tone begins or ends. The event handler receives as input a single parameter of type RTCDTMFToneChangeEvent, which describes the change.


RTCDTMFSender.ontonechange = toneChangeHandlerFunction;


A function which is called when a tonechange event is sent to the RTCDTMFSender, indicating that a DTMF tone has either started playing, or if all tones have finished playing.




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

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support ? No support 52 (52) No support ? No support
Feature Android Chrome Firefox Mobile (Gecko) Firefox OS IE Phone Opera Mobile Safari Mobile
Basic support ? ? 52.0 (52) ? No support ? No support

See also

Document Tags and Contributors

 Contributors to this page: dminor, Sheppy
 Last updated by: dminor,