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

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) Not supported (Yes) ?
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? ? ? Not supported ? ?


See also

Document Tags and Contributors

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