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The MediaStreamTrack.onoverconstrained event handler is a property called when the overconstrained event is received. Such an event is sent when the track is again able to send data.


track.onoverconstrained = function;


  • function is the name of a user-defined function, without the () suffix or any parameters, or an anonymous function declaration, such as function(event) {...}. An event handler always has one single parameter, containing the event, here of type MediaStreamErrorEvent.


dc.onoverconstrained = function(ev) { alert("overconstrained event detected!"); };


Specification Status Comment
Media Capture and Streams
The definition of 'MediaStreamTrack.onoverconstrained' in that specification.
Candidate Recommendation Initial specification.

Browser compatibility

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

See also

Document Tags and Contributors

 Contributors to this page: fscholz, libbymc, teoli
 Last updated by: fscholz,