RTCPeerConnection.iceGatheringState

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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

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`iceGatheringState`	Chrome Full support 25	Edge Full support 15	Firefox Full support 22	IE No support No	Opera Full support 43 Notes Full support 43 Notes Notes Promise-based version. No support 37 — 43	Safari Full support 11	WebView Android Full support Yes	Chrome Android Full support 25	Firefox Android Full support 44	Opera Android Full support 43 Notes Full support 43 Notes Notes Promise-based version. No support 37 — 43	Safari iOS Full support Yes	Samsung Internet Android Full support 6.0

Legend

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