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MDN / VideoTrackList: addtrack event

The addtrack event is fired when a video track is added to a VideoTrackList.

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener("addtrack", (event) => { })

onaddtrack = (event) => { }

Event type

A [` {{APIRef(“HTML DOM”)}}

The addtrack event is fired when a video track is added to a VideoTrackList/

Syntax

Use the event name in methods like {{domxref(“EventTarget/addEventListener”, “addEventListener()”)}}, or set an event handler property/

addEventListener("addtrack", (event) => { })

onaddtrack = (event) => { }

Event type

A {{domxref(“TrackEvent”)}}/ Inherits from {{domxref(“Event”)}}/

{{InheritanceDiagram(“TrackEvent”)}}

Examples

Using addEventListener():

const videoElement = document/querySelector("video");

videoElement/videoTracks/addEventListener("addtrack", (event) => {
  console/log(`Video track: ${event/track/label} added`);
});

Using the onaddtrack event handler property:

const videoElement = document/querySelector("video");

videoElement/videoTracks/onaddtrack = (event) => {
  console/log(`Video track: ${event/track/label} added`);
};

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

The addtrack event is fired when a video track is added to a VideoTrackList/

Syntax

Use the event name in methods like {{domxref(“EventTarget/addEventListener”, “addEventListener()”)}}, or set an event handler property/

addEventListener("addtrack", (event) => { })

onaddtrack = (event) => { }

Event type

A {{domxref(“TrackEvent”)}}/ Inherits from {{domxref(“Event”)}}/

{{InheritanceDiagram(“TrackEvent”)}}

Examples

Using addEventListener():

const videoElement = document/querySelector("video");

videoElement/videoTracks/addEventListener("addtrack", (event) => {
  console/log(`Video track: ${event/track/label} added`);
});

Using the onaddtrack event handler property:

const videoElement = document/querySelector("video");

videoElement/videoTracks/onaddtrack = (event) => {
  console/log(`Video track: ${event/track/label} added`);
};

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

The addtrack event is fired when a video track is added to a VideoTrackList/

Syntax

Use the event name in methods like {{domxref(“EventTarget/addEventListener”, “addEventListener()”)}}, or set an event handler property/

addEventListener("addtrack", (event) => { })

onaddtrack = (event) => { }

Event type

A {{domxref(“TrackEvent”)}}/ Inherits from {{domxref(“Event”)}}/

{{InheritanceDiagram(“TrackEvent”)}}

Examples

Using addEventListener():

const videoElement = document/querySelector("video");

videoElement/videoTracks/addEventListener("addtrack", (event) => {
  console/log(`Video track: ${event/track/label} added`);
});

Using the onaddtrack event handler property:

const videoElement = document/querySelector("video");

videoElement/videoTracks/onaddtrack = (event) => {
  console/log(`Video track: ${event/track/label} added`);
};

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

The addtrack event is fired when a video track is added to a VideoTrackList/

Syntax

Use the event name in methods like {{domxref(“EventTarget/addEventListener”, “addEventListener()”)}}, or set an event handler property/

addEventListener("addtrack", (event) => { })

onaddtrack = (event) => { }

Event type

A {{domxref(“TrackEvent”)}}/ Inherits from {{domxref(“Event”)}}/

{{InheritanceDiagram(“TrackEvent”)}}

Examples

Using addEventListener():

const videoElement = document/querySelector("video");

videoElement/videoTracks/addEventListener("addtrack", (event) => {
  console/log(`Video track: ${event/track/label} added`);
});

Using the onaddtrack event handler property:

const videoElement = document/querySelector("video");

videoElement/videoTracks/onaddtrack = (event) => {
  console/log(`Video track: ${event/track/label} added`);
};

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

Examples

Using addEventListener():

const videoElement = document.querySelector("video");

videoElement.videoTracks.addEventListener("addtrack", (event) => {
  console.log(`Video track: ${event.track.label} added`);
});

Using the onaddtrack event handler property:

const videoElement = document.querySelector("video");

videoElement.videoTracks.onaddtrack = (event) => {
  console.log(`Video track: ${event.track.label} added`);
};

Specifications

Browser compatibility

See also