RTCIceCandidateStats.transportId
 The RTCIceCandidateStats dictionary's transportId property is a string that uniquely identifies the transport that produced the RTCTransportStats from which information about this candidate was taken. 
Syntax
transportID = rtcIceCandidateStats.transportId;
Value
 A DOMString whose value uniquely identifies the transport from which any transport-related information accumulated in the RTCIceCandidateStats was taken. This can be used to compare candidates that would use the same transport, for example. 
Specifications
| Specification | 
|---|
| Identifiers for WebRTC's Statistics API (WebRTC Statistics) # dom-rtcicecandidatestats-transportid  | 
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
transportId | 
No  | 
No  | 
31  | 
No  | 
?  | 
12.1  | 
No  | 
No  | 
31  | 
?  | 
12.2  | 
No  | 
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    https://developer.mozilla.org/en-US/docs/Web/API/RTCIceCandidateStats/transportId