RTCIceTransport: gatheringstatechange event
A gatheringstatechange
event is sent to an RTCIceTransport
when its ICE candidate gathering state changes.
The gathering state, whose actual status can be found in the transport object's gatheringState
property, indicates whether or not the ICE agent has begun gathering candidates, and if so, if it has finished doing so.
The key difference between gatheringstatechange
and icegatheringstatechange
is that the latter represents the overall state of the connection including every RTCIceTransport
used by every RTCRtpSender
and every RTCRtpReceiver
on the entire connection. In contrast, gatheringstatechange
represents changes to the candidate gathering state for a single transport.
This event is not cancelable and does not bubble.
Syntax
Use the event name in methods like addEventListener()
, or set an event handler property.
addEventListener('gatheringstatechange', event => { });
ongatheringstatechange = event => { };
Event type
A generic Event
.
Examples
This example creates a handler for gatheringstatechange
events on each RTCRtpSender
associated with a given RTCPeerConnection
. Here, the addEventListener()
method is called to add a listener for gatheringstatechange
events:
pc.getSenders().forEach(sender => {
sender.transport.iceTransport.addEventListener("gatheringstatechange", ev => {
let transport = ev.target;
if (transport.gatheringState === "complete") {
/* this transport has finished gathering candidates,
but others may still be working on it */
}
}, false);
Likewise, you can use the ongatheringstatechange
event handler property:
pc.getSenders().forEach(sender => {
sender.transport.iceTransport.ongatheringstatechange = ev => {
let transport = ev.target;
if (transport.gatheringState === "complete") {
/* this transport has finished gathering candidates,
but others may still be working on it */
}
};
});
Specifications
Specification |
---|
WebRTC 1.0: Real-Time Communication Between Browsers # event-icetransport-gatheringstatechange |
Browser compatibility
BCD tables only load in the browser