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MDN / MediaStream: addtrack event

The addtrack event is fired when a new MediaStreamTrack object has been added to a MediaStream.

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

onaddtrack = (event) => { }

Event type

A [` {{APIRef(“Media Capture and Streams”)}}

The addtrack event is fired when a new MediaStreamTrack object has been added to a MediaStream/

This event is not cancelable and does not bubble/

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(“MediaStreamTrackEvent”)}}/ Inherits from {{domxref(“Event”)}}/

{{InheritanceDiagram(“MediaStreamTrackEvent”)}}

Examples

Using addEventListener():

const stream = new MediaStream();

stream/addEventListener("addtrack", (event) => {
  console/log(`New ${event/track/kind} track added`);
});

Using the onaddtrack event handler property:

const stream = new MediaStream();

stream/onaddtrack = (event) => {
  console/log(`New ${event/track/kind} track added`);
};

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

The addtrack event is fired when a new MediaStreamTrack object has been added to a MediaStream/

This event is not cancelable and does not bubble/

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(“MediaStreamTrackEvent”)}}/ Inherits from {{domxref(“Event”)}}/

{{InheritanceDiagram(“MediaStreamTrackEvent”)}}

Examples

Using addEventListener():

const stream = new MediaStream();

stream/addEventListener("addtrack", (event) => {
  console/log(`New ${event/track/kind} track added`);
});

Using the onaddtrack event handler property:

const stream = new MediaStream();

stream/onaddtrack = (event) => {
  console/log(`New ${event/track/kind} track added`);
};

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

The addtrack event is fired when a new MediaStreamTrack object has been added to a MediaStream/

This event is not cancelable and does not bubble/

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(“MediaStreamTrackEvent”)}}/ Inherits from {{domxref(“Event”)}}/

{{InheritanceDiagram(“MediaStreamTrackEvent”)}}

Examples

Using addEventListener():

const stream = new MediaStream();

stream/addEventListener("addtrack", (event) => {
  console/log(`New ${event/track/kind} track added`);
});

Using the onaddtrack event handler property:

const stream = new MediaStream();

stream/onaddtrack = (event) => {
  console/log(`New ${event/track/kind} track added`);
};

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

The addtrack event is fired when a new MediaStreamTrack object has been added to a MediaStream/

This event is not cancelable and does not bubble/

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(“MediaStreamTrackEvent”)}}/ Inherits from {{domxref(“Event”)}}/

{{InheritanceDiagram(“MediaStreamTrackEvent”)}}

Examples

Using addEventListener():

const stream = new MediaStream();

stream/addEventListener("addtrack", (event) => {
  console/log(`New ${event/track/kind} track added`);
});

Using the onaddtrack event handler property:

const stream = new MediaStream();

stream/onaddtrack = (event) => {
  console/log(`New ${event/track/kind} track added`);
};

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

Examples

Using addEventListener():

const stream = new MediaStream();

stream.addEventListener("addtrack", (event) => {
  console.log(`New ${event.track.kind} track added`);
});

Using the onaddtrack event handler property:

const stream = new MediaStream();

stream.onaddtrack = (event) => {
  console.log(`New ${event.track.kind} track added`);
};

Specifications

Browser compatibility

See also