RTCPeerConnection.oniceconnectionstatechange

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

The RTCPeerConnection.oniceconnectionstatechange property is an event handler which specifies a function to be called when the iceconnectionstatechange event is fired on an RTCPeerConnection instance. This happens when the state of the connection's ICE agent, as represented by the iceConnectionState property, changes.

Syntax

RTCPeerConnection.oniceconnectionstatechange = eventHandler;

Value

This event handler can be set to function which is passed a single input parameter: an Event object describing the iceconnectionstatechange event which occurred. Your code can look at the value of RTCPeerConnection.iceConnectionState to determine what the new state is.

Example

The example below watches the state of the ICE agent for a failure or unexpected closure and takes appropriate action, such as presenting an error message or attempting to restart the ICE agent.

pc.oniceconnectionstatechange = function(event) {
  if (pc.iceConnectionState === "failed" ||
      pc.iceConnectionState === "disconnected" ||
      pc.iceConnectionState === "closed") {
    // Handle the failure
  }
};

Of course, "disconnected" and "closed" don't necessarily indicate errors; these can be the result of normal ICE negotiation, so be sure to handle these properly (if at all).

Specifications

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

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic support
Experimental
Chrome Full support 56Edge Full support 15Firefox Full support 22IE ? Opera Full support 43
Notes
Full support 43
Notes
Notes Promise based version.
No support 37 — 43
Safari ? WebView Android Full support 56Chrome Android Full support 56Edge 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 ? Samsung Internet Android Full support 6.0

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
See implementation notes.
See implementation notes.

See also

Document Tags and Contributors

Contributors to this page: boldt, fscholz, kalitine, jpmedley, abbycar, Sheppy, teoli
Last updated by: boldt,