The track
event is sent to the ontrack
event handler on RTCPeerConnection
s after a new track has been added to an RTCRtpReceiver
which is part of the connection.
Bubbles | Yes |
---|---|
Cancelable | No |
Interface | RTCTrackEvent |
Event handler property | ontrack |
By the time this event is delivered, the new track has been fully added to the peer connection. See Track event types in RTCTrackEvent for details.
Examples
This example shows code that creates a new RTCPeerConnection
, then adds a new track
event handler.
pc = new RTCPeerConnection({
iceServers: [
{
urls: "turn:fake.turnserver.url",
username: "someusername",
credential: "somepassword"
}
]
});
pc.addEventListener("track", e => {
videoElement.srcObject = e.streams[0];
hangupButton.disabled = false;
}, false);
The event handler assigns the new track's first stream to an existing <video>
element, identified using the variable videoElement
.
You can also assign the event handler function to the ontrack
property, rather than use addEventListener()
.
pc.ontrack = e => {
videoElement.srcObject = e.streams[0];
hangupButton.disabled = false;
return false;
}
Specifications
Specification | Status | Comment |
---|---|---|
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'track' in that specification. |
Candidate Recommendation | Initial specification. |
Browser compatibility
BCD tables only load in the browser