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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.
Candidate Recommendation  

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes ?52 No ? ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No Yes ?52 ? ? ?

See also

Document Tags and Contributors

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