Documentation

Interfaces

Classes

AccessTokenExpiredError
AccessTokenGrantsInvalidError
AccessTokenHeaderInvalidError
AccessTokenInvalidError
AccessTokenIssuerInvalidError
AccessTokenNotYetValidError
AccessTokenSignatureInvalidError
AudioTrack
ConfigurationAcquireFailedError
ConfigurationAcquireTurnFailedError
LocalAudioTrack
LocalAudioTrackPublication
LocalAudioTrackStats
LocalDataTrack
LocalDataTrackPublication
LocalParticipant
LocalTrackPublication
LocalTrackStats
LocalVideoTrack
LocalVideoTrackPublication
LocalVideoTrackStats
MediaClientLocalDescFailedError
MediaClientRemoteDescFailedError
MediaConnectionError
MediaDTLSTransportFailedError
MediaNoSupportedCodecError
MediaServerLocalDescFailedError
MediaServerRemoteDescFailedError
NetworkQualityAudioStats
NetworkQualityBandwidthStats
NetworkQualityFractionLostStats
NetworkQualityLatencyStats
NetworkQualityMediaStats
NetworkQualityRecvStats
NetworkQualitySendOrRecvStats
NetworkQualitySendStats
NetworkQualityStats
NetworkQualityVideoStats
Participant
ParticipantDuplicateIdentityError
ParticipantIdentityCharsInvalidError
ParticipantIdentityInvalidError
ParticipantIdentityTooLongError
ParticipantMaxTracksExceededError
ParticipantNotFoundError
PreflightTest
RemoteAudioTrack
RemoteAudioTrackPublication
RemoteAudioTrackStats
RemoteDataTrack
RemoteDataTrackPublication
RemoteParticipant
RemoteTrackPublication
RemoteTrackStats
RemoteVideoTrack
RemoteVideoTrackPublication
RemoteVideoTrackStats
Room
RoomAudioOnlyFlagNotSupportedError
RoomCompletedError
RoomConnectFailedError
RoomCreateFailedError
RoomInvalidParametersError
RoomMaxParticipantsExceededError
RoomMaxParticipantsOutOfRangeError
RoomMediaRegionInvalidError
RoomMediaRegionUnavailableError
RoomNameCharsInvalidError
RoomNameInvalidError
RoomNameTooLongError
RoomNotFoundError
RoomRoomExistsError
RoomStatusCallbackInvalidError
RoomStatusCallbackMethodInvalidError
RoomStatusInvalidError
RoomSubscriptionOperationNotSupportedError
RoomTimeoutOutOfRangeError
RoomTrackKindNotSupportedError
RoomTypeInvalidError
SignalingConnectionDisconnectedError
SignalingConnectionError
SignalingConnectionTimeoutError
SignalingIncomingMessageInvalidError
SignalingOutgoingMessageInvalidError
SignalingServerBusyError
StatsReport
Track
TrackInvalidError
TrackNameCharsInvalidError
TrackNameInvalidError
TrackNameIsDuplicatedError
TrackNameTooLongError
TrackPublication
TrackServerTrackCapacityReachedError
TrackStats
TwilioError
VideoTrack

Events

disabled

The AudioTrack was disabled, i.e. "muted".

Parameters:
Name Type Description
track AudioTrack

The AudioTrack that was disabled

enabled

The AudioTrack was enabled, i.e. "unmuted".

Parameters:
Name Type Description
track AudioTrack

The AudioTrack that was enabled

started

The AudioTrack started. This means there is enough audio data to begin playback.

Parameters:
Name Type Description
track AudioTrack

The AudioTrack that started

event

The SDK raised an EventListenerEvent.

Parameters:
Name Type Description
event EventListenerEvent

Context about the event raised by the SDK. This can be one of the following:

disabled

The LocalAudioTrack was disabled, i.e. "muted".

Parameters:
Name Type Description
track LocalAudioTrack

The LocalAudioTrack that was disabled
Overrides:

enabled

The LocalAudioTrack was enabled, i.e. "unmuted".

Parameters:
Name Type Description
track LocalAudioTrack

The LocalAudioTrack that was enabled
Overrides:

started

The LocalAudioTrack started. This means there is enough audio data to begin playback.

Parameters:
Name Type Description
track LocalAudioTrack

The LocalAudioTrack that started
Overrides:

stopped

The LocalAudioTrack stopped, either because LocalAudioTrack#stop or LocalAudioTrack#restart was called or because the underlying MediaStreamTrack ended.

Parameters:
Name Type Description
track LocalAudioTrack

The LocalAudioTrack that stopped

trackDisabled

The published Track was disabled.

Inherited From:
Overrides:

trackEnabled

The published Track was enabled.

Inherited From:
Overrides:

warning

The published LocalTrack encountered a warning. This event is only raised if you enabled warnings using notifyWarnings in ConnectOptions.

Parameters:
Name Type Description
name string

The warning that was raised.
Inherited From:
Overrides:

warningsCleared

The published LocalTrack cleared all warnings. This event is only raised if you enabled warnings using notifyWarnings in ConnectOptions.

Inherited From:
Overrides:

trackDisabled

The published Track was disabled.

Inherited From:
Overrides:

trackEnabled

The published Track was enabled.

Inherited From:
Overrides:

warning

The published LocalTrack encountered a warning. This event is only raised if you enabled warnings using notifyWarnings in ConnectOptions.

Parameters:
Name Type Description
name string

The warning that was raised.
Inherited From:
Overrides:

warningsCleared

The published LocalTrack cleared all warnings. This event is only raised if you enabled warnings using notifyWarnings in ConnectOptions.

Inherited From:
Overrides:

disconnected

The Participant has disconnected.

Parameters:
Name Type Description
participant Participant

The Participant that disconnected.
Inherited From:
Overrides:

networkQualityLevelChanged

The Participant's NetworkQualityLevel changed.

Parameters:
Name Type Argument Description
networkQualityLevel NetworkQualityLevel

The new NetworkQualityLevel
networkQualityStats NetworkQualityStats <nullable>

The NetworkQualityStats based on which NetworkQualityLevel is calculated, if any
Inherited From:
Overrides:

reconnected

The LocalParticipant has reconnected to the Room after a signaling connection disruption.

Overrides:

reconnecting

The LocalParticipant is reconnecting to the Room after a signaling connection disruption.

Overrides:

trackDimensionsChanged

One of the LocalParticipant's LocalVideoTrack's dimensions changed.

Parameters:
Name Type Description
track LocalVideoTrack

The LocalVideoTrack whose dimensions changed
Overrides:

trackDisabled

A LocalTrack was disabled by the LocalParticipant.

Parameters:
Name Type Description
track LocalTrack

The LocalTrack that was disabled

trackEnabled

A LocalTrack was enabled by the LocalParticipant.

Parameters:
Name Type Description
track LocalTrack

The LocalTrack that was enabled

trackPublicationFailed

A LocalTrack failed to publish. Check the error message for more information. In a Large Group Room (Maximum Participants greater than 50), this event is raised with a ParticipantMaxTracksExceededError either when attempting to publish the LocalTrack will exceed the Maximum Published Tracks limit of 16, or the LocalTrack is part of a set of LocalTracks which along with the published Tracks exceeds 16.

Parameters:
Name Type Description
error TwilioError

A TwilioError explaining why publication failed
localTrack LocalTrack

The LocalTrack that failed to publish

trackPublished

A LocalTrack was successfully published.

Parameters:
Name Type Description
publication LocalTrackPublication

The resulting LocalTrackPublication for the published LocalTrack

trackStarted

One of the LocalParticipant's LocalTracks started.

Parameters:
Name Type Description
track LocalTrack

The LocalTrack that started
Overrides:

trackStopped

One of the LocalParticipant's LocalTracks stopped, either because LocalTrack#stop was called or because the underlying MediaStreamTrack ended).

Parameters:
Name Type Description
track LocalTrack

The LocalTrack that stopped

trackWarning

One of the LocalParticipant's LocalTrackPublications encountered a warning. This event is only raised if you enabled warnings using notifyWarnings in ConnectOptions.

Parameters:
Name Type Description
name string

The warning that was raised.
publication LocalTrackPublication

The LocalTrackPublication that encountered the warning.

trackWarningsCleared

One of the LocalParticipant's LocalTrackPublications cleared all warnings. This event is only raised if you enabled warnings using notifyWarnings in ConnectOptions.

Parameters:
Name Type Description
publication LocalTrackPublication

The LocalTrackPublication that cleared all warnings.

trackDisabled

The published Track was disabled.

Inherited From:
Overrides:

trackEnabled

The published Track was enabled.

Inherited From:
Overrides:

warning

The published LocalTrack encountered a warning. This event is only raised if you enabled warnings using notifyWarnings in ConnectOptions.

Parameters:
Name Type Description
name string

The warning that was raised.

warningsCleared

The published LocalTrack cleared all warnings. This event is only raised if you enabled warnings using notifyWarnings in ConnectOptions.

dimensionsChanged

The VideoTrack's dimensions changed.

Parameters:
Name Type Description
track VideoTrack

The VideoTrack whose dimensions changed
Inherited From:
Overrides:

disabled

The LocalVideoTrack was disabled, i.e. "muted".

Parameters:
Name Type Description
track LocalVideoTrack

The LocalVideoTrack that was disabled
Overrides:

enabled

The LocalVideoTrack was enabled, i.e. "unmuted".

Parameters:
Name Type Description
track LocalVideoTrack

The LocalVideoTrack that was enabled
Overrides:

started

The LocalVideoTrack started. This means there is enough video data to begin playback.

Parameters:
Name Type Description
track LocalVideoTrack

The LocalVideoTrack that started
Overrides:

stopped

The LocalVideoTrack stopped, either because LocalVideoTrack#stop or LocalVideoTrack#restart was called or because the underlying MediaStreamTrack ended.

Parameters:
Name Type Description
track LocalVideoTrack

The LocalVideoTrack that stopped

trackDisabled

The published Track was disabled.

Inherited From:
Overrides:

trackEnabled

The published Track was enabled.

Inherited From:
Overrides:

warning

The published LocalTrack encountered a warning. This event is only raised if you enabled warnings using notifyWarnings in ConnectOptions.

Parameters:
Name Type Description
name string

The warning that was raised.
Inherited From:
Overrides:

warningsCleared

The published LocalTrack cleared all warnings. This event is only raised if you enabled warnings using notifyWarnings in ConnectOptions.

Inherited From:
Overrides:

disconnected

The Participant has disconnected.

Parameters:
Name Type Description
participant Participant

The Participant that disconnected.

networkQualityLevelChanged

The Participant's NetworkQualityLevel changed.

Parameters:
Name Type Argument Description
networkQualityLevel NetworkQualityLevel

The new NetworkQualityLevel
networkQualityStats NetworkQualityStats <nullable>

The NetworkQualityStats based on which NetworkQualityLevel is calculated, if any

reconnected

The Participant has reconnected to the Room after a signaling connection disruption.

reconnecting

The Participant is reconnecting to the Room after a signaling connection disruption.

trackDimensionsChanged

One of the Participant's VideoTrack's dimensions changed.

Parameters:
Name Type Description
track VideoTrack

The VideoTrack whose dimensions changed

trackStarted

One of the Participant's Tracks started.

Parameters:
Name Type Description
track Track

The Track that started

completed

Preflight test has completed successfully.

Parameters:
Name Type Description
report PreflightTestReport

Results of the test.

failed

Preflight test has encountered a failure and is now stopped.

Parameters:
Name Type Description
error TwilioError | Error

A TwilioError or a DOMException. Possible TwilioErrors include Signaling and Media related errors which can be found here.
report PreflightTestReport

Partial results gathered during the test. Use this information to help determine the cause of failure.

progress

Emitted to indicate progress of the test

Parameters:
Name Type Description
progress PreflightProgress

Indicates the status completed.

disabled

The RemoteAudioTrack was disabled, i.e. "muted".

Parameters:
Name Type Description
track RemoteAudioTrack

The RemoteAudioTrack that was disabled
Overrides:

enabled

The RemoteAudioTrack was enabled, i.e. "unmuted".

Parameters:
Name Type Description
track RemoteAudioTrack

The RemoteAudioTrack that was enabled
Overrides:

started

The RemoteAudioTrack started. This means there is enough audio data to begin playback.

Parameters:
Name Type Description
track RemoteAudioTrack

The RemoteAudioTrack that started
Overrides:

switchedOff

A RemoteAudioTrack was switched off.

Parameters:
Name Type Description
track RemoteAudioTrack

The RemoteAudioTrack that was switched off

switchedOn

A RemoteAudioTrack was switched on.

Parameters:
Name Type Description
track RemoteAudioTrack

The RemoteAudioTrack that was switched on

subscribed

Your LocalParticipant subscribed to the RemoteAudioTrack.

Parameters:
Name Type Description
track RemoteAudioTrack

the RemoteAudioTrack that was subscribed to

subscriptionFailed

Your LocalParticipant failed to subscribe to the RemoteAudioTrack.

Parameters:
Name Type Description
error TwilioError

the reason the RemoteAudioTrack could not be subscribed to

trackDisabled

The RemoteAudioTrack was disabled.

trackEnabled

The RemoteAudioTrack was enabled.

unsubscribed

Your LocalParticipant unsubscribed from the RemoteAudioTrack.

Parameters:
Name Type Description
track RemoteAudioTrack

the RemoteAudioTrack that was unsubscribed from

message

A message was received over the RemoteDataTrack.

Parameters:
Name Type Description
data string | ArrayBuffer
track RemoteDataTrack

The RemoteDataTrack that received the message

switchedOff

A RemoteDataTrack was switched off.

Parameters:
Name Type Description
track RemoteDataTrack

The RemoteDataTrack that was switched off

switchedOn

A RemoteDataTrack was switched on.

Parameters:
Name Type Description
track RemoteDataTrack

The RemoteDataTrack that was switched on

subscribed

Your LocalParticipant subscribed to the RemoteDataTrack.

Parameters:
Name Type Description
track RemoteDataTrack

the RemoteDataTrack that was subscribed to

subscriptionFailed

Your LocalParticipant failed to subscribe to the RemoteDataTrack.

Parameters:
Name Type Description
error TwilioError

the reason the RemoteDataTrack could not be subscribed to

unsubscribed

Your LocalParticipant unsubscribed from the RemoteDataTrack.

Parameters:
Name Type Description
track RemoteDataTrack

the RemoteDataTrack that was unsubscribed from

disconnected

The Participant has disconnected.

Parameters:
Name Type Description
participant Participant

The Participant that disconnected.
Inherited From:
Overrides:

networkQualityLevelChanged

The Participant's NetworkQualityLevel changed.

Parameters:
Name Type Argument Description
networkQualityLevel NetworkQualityLevel

The new NetworkQualityLevel
networkQualityStats NetworkQualityStats <nullable>

The NetworkQualityStats based on which NetworkQualityLevel is calculated, if any
Inherited From:
Overrides:

reconnected

The RemoteParticipant has reconnected to the Room after a signaling connection disruption.

Overrides:

reconnecting

The RemoteParticipant is reconnecting to the Room after a signaling connection disruption.

Overrides:

trackDimensionsChanged

One of the RemoteParticipant's RemoteVideoTrack's dimensions changed.

Parameters:
Name Type Description
track RemoteVideoTrack

The RemoteVideoTrack whose dimensions changed
Overrides:

trackDisabled

A RemoteTrack was disabled by the RemoteParticipant.

Parameters:
Name Type Description
publication RemoteTrackPublication

The RemoteTrackPublication associated with the disabled RemoteTrack

trackEnabled

A RemoteTrack was enabled by the RemoteParticipant.

Parameters:
Name Type Description
publication RemoteTrackPublication

The RemoteTrackPublication associated with the enabled RemoteTrack

trackMessage

A message was received over one of the RemoteParticipant's RemoteDataTracks.

Parameters:
Name Type Description
data string | ArrayBuffer
track RemoteDataTrack

The RemoteDataTrack over which the message was received

trackPublished

A RemoteTrack was published by the RemoteParticipant after connecting to the Room. This event is not emitted for RemoteTracks that were published while the RemoteParticipant was connecting to the Room.

Parameters:
Name Type Description
publication RemoteTrackPublication

The RemoteTrackPublication which represents the published RemoteTrack
Example
function trackPublished(publication) {
  console.log(`Track ${publication.trackSid} was published`);
}

room.on('participantConnected', participant => {
  // Handle RemoteTracks published while connecting to the Room.
  participant.trackPublications.forEach(trackPublished);

  // Handle RemoteTracks published after connecting to the Room.
  participant.on('trackPublished', trackPublished);
});

trackPublishPriorityChanged

The RemoteTrackPublication's publish Track.Priority was changed by the RemoteParticipant.

Parameters:
Name Type Description
priority Track.Priority

the RemoteTrack's new publish Track.Priority;
publication RemoteTrackPublication

The RemoteTrackPublication for the RemoteTrack that changed priority

trackStarted

One of the RemoteParticipant's RemoteTracks started.

Parameters:
Name Type Description
track RemoteTrack

The RemoteTrack that started
Overrides:

trackSubscribed

A RemoteParticipant's RemoteTrack was subscribed to.

Parameters:
Name Type Description
track RemoteTrack

The RemoteTrack that was subscribed to
publication RemoteTrackPublication

The RemoteTrackPublication for the RemoteTrack that was subscribed to

trackSubscriptionFailed

A RemoteParticipant's RemoteTrack could not be subscribed to.

Parameters:
Name Type Description
error TwilioError

The reason the RemoteTrack could not be subscribed to
publication RemoteTrackPublication

The RemoteTrackPublication for the RemoteTrack that could not be subscribed to

trackSwitchedOff

A RemoteParticipant's RemoteTrack was subscribed to.

Parameters:
Name Type Description
track RemoteTrack

The RemoteTrack that was switched off
publication RemoteTrackPublication

The RemoteTrackPublication for the RemoteTrack that was switched off

trackSwitchedOn

A RemoteParticipant's RemoteTrack was switched on.

Parameters:
Name Type Description
track RemoteTrack

The RemoteTrack that was switched on.
publication RemoteTrackPublication

The RemoteTrackPublication for the RemoteTrack that was switched on

trackUnpublished

A RemoteTrack was unpublished by the RemoteParticipant.

Parameters:
Name Type Description
publication RemoteTrackPublication

The RemoteTrackPublication which represents the unpublished RemoteTrack

trackUnsubscribed

A RemoteParticipant's RemoteTrack was unsubscribed from.

Parameters:
Name Type Description
track RemoteTrack

The RemoteTrack that was unsubscribed from
publication RemoteTrackPublication

The RemoteTrackPublication for the RemoteTrack that was unsubscribed from

publishPriorityChanged

The RemoteTrack's publish Track.Priority was changed by the RemoteParticipant.

Parameters:
Name Type Description
priority Track.Priority

the RemoteTrack's new publish Track.Priority; RemoteTrackPublication#publishPriority is also updated accordingly

subscribed

Your LocalParticipant subscribed to the RemoteTrack.

Parameters:
Name Type Description
track RemoteTrack

the RemoteTrack that was subscribed to

subscriptionFailed

Your LocalParticipant failed to subscribe to the RemoteTrack.

Parameters:
Name Type Description
error TwilioError

the reason the RemoteTrack could not be subscribed to

trackDisabled

The RemoteTrack was disabled.

Overrides:

trackEnabled

The RemoteTrack was enabled.

Overrides:

trackSwitchedOff

The RemoteTrack was switched off.

Parameters:
Name Type Description
track RemoteTrack

the RemoteTrack that was switched off

trackSwitchedOn

The RemoteTrack was switched on.

Parameters:
Name Type Description
track RemoteTrack

the RemoteTrack that was switched on

unsubscribed

Your LocalParticipant unsubscribed from the RemoteTrack.

Parameters:
Name Type Description
track RemoteTrack

the RemoteTrack that was unsubscribed from

dimensionsChanged

The RemoteVideoTrack's dimensions changed.

Parameters:
Name Type Description
track RemoteVideoTrack

The RemoteVideoTrack whose dimensions changed
Overrides:

disabled

The RemoteVideoTrack was disabled, i.e. "paused".

Parameters:
Name Type Description
track RemoteVideoTrack

The RemoteVideoTrack that was disabled
Overrides:

enabled

The RemoteVideoTrack was enabled, i.e. "resumed".

Parameters:
Name Type Description
track RemoteVideoTrack

The RemoteVideoTrack that was enabled
Overrides:

started

The RemoteVideoTrack started. This means there is enough video data to begin playback.

Parameters:
Name Type Description
track RemoteVideoTrack

The RemoteVideoTrack that started
Overrides:

switchedOff

A RemoteVideoTrack was switched off.

Parameters:
Name Type Description
track RemoteVideoTrack

The RemoteVideoTrack that was switched off

switchedOn

A RemoteVideoTrack was switched on.

Parameters:
Name Type Description
track RemoteVideoTrack

The RemoteVideoTrack that was switched on

subscribed

Your LocalParticipant subscribed to the RemoteVideoTrack.

Parameters:
Name Type Description
track RemoteVideoTrack

the RemoteVideoTrack that was subscribed to

subscriptionFailed

Your LocalParticipant failed to subscribe to the RemoteVideoTrack.

Parameters:
Name Type Description
error TwilioError

the reason the RemoteVideoTrack could not be subscribed to

trackDisabled

The RemoteVideoTrack was disabled.

trackEnabled

The RemoteVideoTrack was enabled.

unsubscribed

Your LocalParticipant unsubscribed from the RemoteVideoTrack.

Parameters:
Name Type Description
track RemoteVideoTrack

the RemoteVideoTrack that was unsubscribed from

disconnected

Your LocalParticipant was disconnected from the Room and all other RemoteParticipants.

Parameters:
Name Type Argument Description
room Room

The Room your LocalParticipant was disconnected from
error TwilioError <nullable>

Present when the LocalParticipant got disconnected from the Room unexpectedly
Example
myRoom.on('disconnected', function(room, error) {
  if (error) {
    console.log('Unexpectedly disconnected:', error);
  }
  myRoom.localParticipant.tracks.forEach(function(track) {
    track.stop();
    track.detach();
  });
});

dominantSpeakerChanged

The Dominant Speaker in the Room changed. Either the Dominant Speaker is a new RemoteParticipant or the Dominant Speaker has been reset and is now null.

Parameters:
Name Type Argument Description
dominantSpeaker RemoteParticipant <nullable>

The Dominant Speaker in the Room, if any

participantConnected

A RemoteParticipant joined the Room. In Large Group Rooms (Maximum Participants greater than 50), this event is raised only when a RemoteParticipant publishes at least one LocalTrack.

Parameters:
Name Type Description
participant RemoteParticipant

The RemoteParticipant who joined
Example
myRoom.on('participantConnected', function(participant) {
  console.log(participant.identity + ' joined the Room');
});

participantDisconnected

A RemoteParticipant left the Room. In Large Group Rooms (Maximum Participants greater than 50), this event is raised only when a RemoteParticipant unpublishes all its LocalTracks.

Parameters:
Name Type Description
participant RemoteParticipant

The RemoteParticipant who left
Example
myRoom.on('participantDisconnected', function(participant) {
  console.log(participant.identity + ' left the Room');
  participant.tracks.forEach(function(track) {
    track.detach().forEach(function(mediaElement) {
      mediaElement.remove();
    });
  });
});

participantReconnected

A RemoteParticipant has reconnected to the Room after a signaling connection disruption.

Parameters:
Name Type Description
participant RemoteParticipant

The RemoteParticipant that has reconnected.
Example
myRoom.on('participantReconnected', participant => {
  console.log(participant.identity + ' reconnected to the Room');
});

participantReconnecting

A RemoteParticipant is reconnecting to the Room after a signaling connection disruption.

Parameters:
Name Type Description
participant RemoteParticipant

The RemoteParticipant that is reconnecting.
Example
myRoom.on('participantReconnecting', participant => {
  console.log(participant.identity + ' is reconnecting to the Room');
});

reconnected

Your application successfully reconnected to the Room. When this event is emitted, the Room is in state "connected".

Example
myRoom.on('reconnected', () => {
  console.log('Reconnected!');
});

reconnecting

Your application is reconnecting to the Room. This happens when there is a disruption in your signaling connection and/or your media connection. When this event is emitted, the Room is in state "reconnecting". If reconnecting succeeds, the Room will emit a "reconnected" event.

Parameters:
Name Type Description
error MediaConnectionError | SignalingConnectionDisconnectedError

A MediaConnectionError if your application is reconnecting due to a disruption in your media connection, or a SignalingConnectionDisconnectedError if your application is reconnecting due to a disruption in your signaling connection
Example
myRoom.on('reconnecting', error => {
  if (error.code === 53001) {
    console.log('Reconnecting your signaling connection!', error.message);
  } else if (error.code === 53405) {
    console.log('Reconnecting your media connection!', error.message);
  }
});

recordingStarted

The Room is now being recorded

recordingStopped

The Room is no longer being recorded

trackDimensionsChanged

One of the RemoteParticipant's VideoTrack's dimensions changed.

Parameters:
Name Type Description
track RemoteVideoTrack

The RemoteVideoTrack whose dimensions changed
participant RemoteParticipant

The RemoteParticipant whose RemoteVideoTrack's dimensions changed

trackDisabled

A RemoteTrack was disabled by a RemoteParticipant in the Room.

Parameters:
Name Type Description
publication RemoteTrackPublication

The RemoteTrackPublication that represents disabled RemoteTrack
participant RemoteParticipant

The RemoteParticipant who disabled the RemoteTrack

trackEnabled

A RemoteTrack was enabled by a RemoteParticipant in the Room.

Parameters:
Name Type Description
publication RemoteTrackPublication

The RemoteTrackPublication that represents enabled RemoteTrack
participant RemoteParticipant

The RemoteParticipant who enabled the RemoteTrack

trackMessage

A message was received over one of the RemoteParticipant's RemoteDataTrack's.

Parameters:
Name Type Description
data string | ArrayBuffer
track RemoteDataTrack

The RemoteDataTrack over which the message was received
participant RemoteParticipant

The RemoteParticipant whose RemoteDataTrack received the message

trackPublished

A RemoteTrack was published by a RemoteParticipant after connecting to the Room. This event is not emitted for RemoteTracks that were published while the RemoteParticipant was connecting to the Room.

Parameters:
Name Type Description
publication RemoteTrackPublication

The RemoteTrackPublication which represents the published RemoteTrack
participant RemoteParticipant

The RemoteParticipant who published the RemoteTrack
Example
function trackPublished(publication, participant) {
  console.log(`RemoteParticipant ${participant.sid} published Track ${publication.trackSid}`);
}

// Handle RemoteTracks published after connecting to the Room.
room.on('trackPublished', trackPublished);

room.on('participantConnected', participant => {
  // Handle RemoteTracks published while connecting to the Room.
  participant.trackPublications.forEach(publication => trackPublished(publication, participant));
});

trackPublishPriorityChanged

The RemoteTrack's publish Track.Priority was changed by the RemoteParticipant.

Parameters:
Name Type Description
priority Track.Priority

the RemoteTrack's new publish Track.Priority;
publication RemoteTrackPublication

The RemoteTrackPublication for the RemoteTrack that changed priority
participant RemoteParticipant

The RemoteParticipant whose RemoteTrack changed priority

trackStarted

One of a RemoteParticipant's RemoteTracks in the Room started.

Parameters:
Name Type Description
track RemoteTrack

The RemoteTrack that started
participant RemoteParticipant

The RemoteParticipant whose RemoteTrack started

trackSubscribed

A RemoteParticipant's RemoteTrack was subscribed to.

Parameters:
Name Type Description
track RemoteTrack

The RemoteTrack that was subscribed
publication RemoteTrackPublication

The RemoteTrackPublication for the RemoteTrack that was subscribed to
participant RemoteParticipant

The RemoteParticipant whose RemoteTrack was subscribed
Example
room.on('trackSubscribed', function(track, publication, participant) {
  var participantView = document.getElementById('participant-view-' + participant.identity);
  participantView.appendChild(track.attach());
});

trackSubscriptionFailed

A RemoteParticipant's RemoteTrack could not be subscribed to.

Parameters:
Name Type Description
error TwilioError

The reason the RemoteTrack could not be subscribed to
publication RemoteTrackPublication

The RemoteTrackPublication for the RemoteTrack that could not be subscribed to
participant RemoteParticipant

The RemoteParticipant whose RemoteTrack could not be subscribed to

trackSwitchedOff

A RemoteParticipant's RemoteTrack was switched off.

Parameters:
Name Type Description
track RemoteTrack

The RemoteTrack that was switched off
publication RemoteTrackPublication

The RemoteTrackPublication for the RemoteTrack that was subscribed to
participant RemoteParticipant

The RemoteParticipant whose RemoteTrack was switched off

trackSwitchedOn

A RemoteParticipant's RemoteTrack was switched on.

Parameters:
Name Type Description
track RemoteTrack

The RemoteTrack that was switched on
publication RemoteTrackPublication

The RemoteTrackPublication for the RemoteTrack that was subscribed to
participant RemoteParticipant

The RemoteParticipant whose RemoteTrack was switched on

trackUnpublished

A RemoteTrack was unpublished by a RemoteParticipant to the Room.

Parameters:
Name Type Description
publication RemoteTrackPublication

The RemoteTrackPublication which represents the unpublished RemoteTrack
participant RemoteParticipant

The RemoteParticipant who unpublished the RemoteTrack

trackUnsubscribed

A RemoteParticipant's RemoteTrack was unsubscribed from.

Parameters:
Name Type Description
track RemoteTrack

The RemoteTrack that was unsubscribed
publication RemoteTrackPublication

The RemoteTrackPublication for the RemoteTrack that was unsubscribed from
participant RemoteParticipant

The RemoteParticipant whose RemoteTrack was unsubscribed
Example
room.on('trackUnsubscribed', function(track, publication, participant) {
  track.detach().forEach(function(mediaElement) {
    mediaElement.remove();
  });
});

trackWarning

One of the LocalParticipant's LocalTrackPublications in the Room encountered a warning. This event is only raised if you enabled warnings using notifyWarnings in ConnectOptions.

Parameters:
Name Type Description
name string

The warning that was raised.
publication LocalTrackPublication

The LocalTrackPublication that encountered the warning.
participant LocalParticipant

The LocalParticipant
Example
room.on('trackWarning', (name, publication, participant) => {
  if (name === 'recording-media-lost') {
    log(`LocalTrack ${publication.track.name} is not recording media.`,
      name, publication, participant);

    // Wait a reasonable amount of time to clear the warning.
    const timer = setTimeout(() => {
      // If the warning is not cleared, you can manually
      // reconnect to the room, or show a dialog to the user
    }, 5000);

    room.once('trackWarningsCleared', (publication, participant) => {
      log('LocalTrack warnings have cleared!',
        publication, participant);
      clearTimeout(timer);
    });
  }
});

trackWarningsCleared

One of the LocalParticipant's LocalTrackPublications in the Room cleared all warnings. This event is only raised if you enabled warnings using notifyWarnings in ConnectOptions.

Parameters:
Name Type Description
publication LocalTrackPublication

The LocalTrackPublication that cleared all warnings.
participant LocalParticipant

The LocalParticipant

trackDisabled

The published Track was disabled.

trackEnabled

The published Track was enabled.

dimensionsChanged

The VideoTrack's dimensions changed.

Parameters:
Name Type Description
track VideoTrack

The VideoTrack whose dimensions changed

disabled

The VideoTrack was disabled, i.e. "paused".

Parameters:
Name Type Description
track VideoTrack

The VideoTrack that was disabled

enabled

The VideoTrack was enabled, i.e. "unpaused".

Parameters:
Name Type Description
track VideoTrack

The VideoTrack that was enabled

started

The VideoTrack started. This means there is enough video data to begin playback.

Parameters:
Name Type Description
track VideoTrack

The VideoTrack that started