RTCPeerConnection.iceGatheringState

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The read-only property RTCPeerConnection.iceGatheringState returns an enum of type RTCIceGatheringState that describes connection's ICE gathering state. This lets you detect, for example, when collection of ICE candidates has finished.

You can detect when the value of this property changes by watching for an event of type icegatheringstatechange.

Syntax

 var state = RTCPeerConnection.iceGatheringState;

Value

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

RTCIceGatheringState enum

The RTCIceGatheringState enum defines string constants which reflect the current status of ICE gathering, as returned using the RTCPeerConnection.iceGatheringState property. You can detect when this value changes by watching for an event of type icegatheringstatechange.

Constant Description
"new" The peer connection was just created and hasn't done any networking yet.
"gathering" The ICE agent is in the process of gathering candidates for the connection.
"complete" The ICE agent has finished gathering candidates. If something happens that requires collecting new candidates, such as a new interface being added or the addition of a new ICE server, the state will revert to "gathering" to gather those candidates.

Example

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

Specifications

Specification Status Comment
WebRTC 1.0: Real-time Communication Between Browsers
The definition of 'RTCPeerConnection.iceGatheringState' in that specification.
Candidate Recommendation Initial specification.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
iceGatheringStateChrome Full support 25Edge Full support 15Firefox Full support 22IE No support NoOpera Full support 43
Notes
Full support 43
Notes
Notes Promise-based version.
No support 37 — 43
Safari Full support 11WebView Android Full support YesChrome Android Full support 25Edge Mobile Full support YesFirefox Android Full support 44Opera Android Full support 43
Notes
Full support 43
Notes
Notes Promise-based version.
No support 37 — 43
Safari iOS Full support YesSamsung Internet Android Full support 6.0

Legend

Full support  
Full support
No support  
No support
See implementation notes.
See implementation notes.

See also

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