RTCIceTransport: statechange event

A statechange event occurs when the RTCIceTransport changes state. The state can be used to determine how far through the process of examining, verifying, and selecting a valid candidate pair is prior to successfully connecting the two peers for WebRTC communications.

Bubbles No
Cancelable No
Interface Event
Event handler property RTCIceTransport.onstatechange


Given an RTCPeerConnection, pc, the following code creates an event handler that calls a function named handleFailure() if the ICE transport enters a failure state.

let iceTransport = pc.getSenders()[0].transport.iceTransport;

iceTransport.addEventListener("statechange", ev => {
  if (iceTransport.state === "failed") {
}, false);

The same code, using the onstatechange event handler property, looks like this:

let iceTransport = pc.getSenders()[0].transport.iceTransport;

iceTransport.onstatechange = ev => {
  if (iceTransport.state === "failed") {


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

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
statechange eventChrome Full support 70Edge No support NoFirefox No support NoIE No support NoOpera No support NoSafari No support NoWebView Android Full support 70Chrome Android Full support 70Edge Mobile No support NoFirefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android No support No


Full support  
Full support
No support  
No support

See also


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