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This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for the proper prefixes to use in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the spec changes.

The read-only property RTCPeerConnection.iceGatheringState returns an enum of type RTCIceGatheringState that describes the ICE gathering state for the connection.


 var state = peerConnection.iceGatheringState;


The possible values are those of an enum of type RTCIceGatheringState:

  • "new": the object was just created, and no networking has occurred yet.
  • "gathering": the ICE engine is in the process of gathering candidates for this RTCPeerConnection.
  • "complete": the ICE engine has completed gathering. Events such as adding a new interface or a new TURN server will cause the state to go back to gathering.


var pc = new RTCPeerConnection();
var state = pc.iceGatheringState;


Specification Status Comment
WebRTC 1.0: Real-time Communication Between Browser
The definition of 'RTCPeerConnection.iceGatheringState' in that specification.
Working Draft Initial specification.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) [1] (Yes) [1] Not supported (Yes) ?
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? ? ? Not supported ? ?

[1] Though this property is not prefixed, the interface it belongs to is.

See also

Document Tags and Contributors

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