MediaStream.onremovetrack - Web APIs
the mediastream.onremovetrack property is an eventhandler which specifies a function to be called when the removetrack event occurs on a mediastream instance. this happens when a track of any kind is removed from the media stream. this event is fired when the browser removes a track from the stream (such as when a rtcpeerconnection is renegotiated or a stream being captured using htmlmediaelement.capturestream() gets a new set of tracks because the media element being captured loaded a new source. the removetrack event does not get fired when javascript code explicitly removes tracks from the stream (by calling removetrack()). ...
...he browser removes a track from the stream (such as when a rtcpeerconnection is renegotiated or a stream being captured using htmlmediaelement.capturestream() gets a new set of tracks because the media element being captured loaded a new source. the removetrack event does not get fired when javascript code explicitly removes tracks from the stream (by calling removetrack()). syntax mediastream.onremovetrack = eventhandler; value this should be set to a function which you provide that accepts as input a mediastreamtrackevent object representing the removetrack event which has occurred. the mediastreamtrack representing the track which was removed is specified in the event's track property. example this example adds a listener which, when a track is removed from the stream, logs the track that wa...
...value this should be set to a function which you provide that accepts as input a mediastreamtrackevent object representing the removetrack event which has occurred. the mediastreamtrack representing the track which was removed is specified in the event's track property. example this example adds a listener which, when a track is removed from the stream, logs the track that was removed. ...
...t was removed. stream.onremovetrack = function(event) { let tracklist = document.getelementbyid("tracks"); let label = document.createelement("li"); label.innerhtml = "removed: " + event.track.kind + ": " + event.track.label; tracklist.appendchild(label); }; specifications specification status comment media capture and streamsthe definition of 'mediastream.onremovetrack' in that specification. candidate recommendation initial specification. ...

AudioTrackList.onremovetrack - Web APIs
the audiotracklist onremovetrack event handler is called when the removetrack event occurs, indicating that an audio track has been removed from the media element, and therefore also from the audiotracklist. the event is passed into the event handler in the form of a trackevent object, whose track property identifies the track that was removed from the media element's audiotracklist. note: you can also add a handler for the removetrack event using addeventlistener(). syntax audiotracklist.onremovetrack = eventhandler; value set onremovetrack to a function that accepts as input a trackevent object which indicates in its track property which audio track has been removed from the media element. example this simple example just fetches the current number of audio tracks in the media element when...
...track = eventhandler; value set onremovetrack to a function that accepts as input a trackevent object which indicates in its track property which audio track has been removed from the media element. example this simple example just fetches the current number of audio tracks in the media element whenever a track is removed from the media element. document.queryselector("my-video").audiotracks.onremovetrack = function(event) { mytrackcount = document.queryselector("my-video").audiotracks.length; }; the current number of audio tracks remaining in the media element is obtained from audiotracklist property length. specifications specification status comment html living standardthe definition of 'audiotracklist.onremovetrack' in that specification. living standard ...
...yselector("my-video").audiotracks.length; }; the current number of audio tracks remaining in the media element is obtained from audiotracklist property length. specifications specification status comment html living standardthe definition of 'audiotracklist.onremovetrack' in that specification. living standard html5the definition of 'audiotracklist.onremovetrack' in that specification. recommendation ...

TextTrackList.onremovetrack - Web APIs
the texttracklist onremovetrack event handler is called when the removetrack event occurs, indicating that a text track has been removed from the media element, and therefore also from the texttracklist. the event is passed into the event handler in the form of a trackevent object, whose track property identifies the track that was removed from the media element's texttracklist. note: you can also add a handler for the removetrack event using addeventlistener(). syntax texttracklist.onremovetrack = eventhandler; value set onremovetrack to a function that accepts as input a trackevent object which indicates in its track property which text track has been removed from the media element. example this simple example just fetches the current number of text tracks in the first media element whenev...
...handler; value set onremovetrack to a function that accepts as input a trackevent object which indicates in its track property which text track has been removed from the media element. example this simple example just fetches the current number of text tracks in the first media element whenever a track is removed from the media element. document.queryselectorall("video, audio")[0].texttracks.onremovetrack = function(event) { mytrackcount = document.queryselectorall("video, audio")[0].texttracks.length; }; the current number of text tracks remaining in the media element is obtained from texttracklist property length. specifications specification status comment html living standardthe definition of 'texttracklist: onremovetrack' in that specification. living stan...

VideoTrackList.onremovetrack - Web APIs
the videotracklist onremovetrack event handler is called when the removetrack event occurs, indicating that a video track has been removed from the media element, and therefore also from the videotracklist. the event is passed into the event handler in the form of a trackevent object, whose track property identifies the track that was removed from the media element's videotracklist. note: you can also add a handler for the removetrack event using addeventlistener(). syntax videotracklist.onremovetrack = eventhandler; value set onremovetrack to a function that accepts as input a trackevent object which indicates in its track property which video track has been removed from the media element. example this simple example just fetches the current number of video tracks in the media element whene...
...track = eventhandler; value set onremovetrack to a function that accepts as input a trackevent object which indicates in its track property which video track has been removed from the media element. example this simple example just fetches the current number of video tracks in the media element whenever a track is removed from the media element. document.queryselector("my-video").videotracks.onremovetrack = function(event) { mytrackcount = document.queryselector("my-video").videotracks.length; }; the current number of video tracks remaining in the media element is obtained from videotracklist property length. specifications specification status comment html living standardthe definition of 'videotracklist: onremovetrack' in that specification. living standard ...

Index - Web APIs
list.onchange api, adding audio tracks, adding tracks, audio, audiotracklist, event handler, html dom, media, property, reference, addtrack, onchange, track the audiotracklist property onchange is an event handler which is called when the change event occurs, indicating that one or more of the audiotracks in the audiotracklist have been enabled or disabled. 198 audiotracklist.onremovetrack api, audio, audiotracklist, event handler, html dom, media, property, reference, removing audio tracks, removing tracks, onremovetrack, remove, removetrack, track the audiotracklist onremovetrack event handler is called when the removetrack event occurs, indicating that an audio track has been removed from the media element, and therefore also from the audiotracklist. 199 aud...
...er (guid) for the object. 2437 mediastream.onaddtrack api, event handler, media streams api, mediastream, property, reference the mediastream.onaddtrack property is an eventhandler which specifies a function to be called when the addtrack event occurs on a mediastream instance. this happens when a new track of any kind is added to the media stream. 2438 mediastream.onremovetrack api, event handler, media streams api, mediastream, property, reference, onremovetrack the mediastream.onremovetrack property is an eventhandler which specifies a function to be called when the removetrack event occurs on a mediastream instance. this happens when a track of any kind is removed from the media stream. 2439 mediastream: addtrack event event the addtrac...
... texttracklist.onchange api, adding tracks, event handler, html dom, htmlmediaelement, media, property, reference, texttrack, texttracklist, addtrack, onchange, text track, track the texttracklist property onchange is an event handler which is called when the change event occurs, indicating that a change has occurred on a texttrack in the videotracklist. 4250 texttracklist.onremovetrack api, event handler, html dom, media, property, reference, removing tracks, texttrack, texttracklist, videotracklist, onremovetrack, remove, removetrack, track the texttracklist onremovetrack event handler is called when the removetrack event occurs, indicating that a text track has been removed from the media element, and therefore also from the texttracklist. 4251 texttrackl...
... 4534 videotracklist.onchange api, adding tracks, adding video tracks, event handler, html dom, media, property, reference, video, videotracklist, addtrack, onchange, track the videotracklist property onchange is an event handler which is called when the change event occurs, indicating that a videotrack in the videotracklist has been made active. 4535 videotracklist.onremovetrack api, event handler, html dom, media, property, reference, removing tracks, removing video tracks, video, videotracklist, onremovetrack, remove, removetrack, track the videotracklist onremovetrack event handler is called when the removetrack event occurs, indicating that a video track has been removed from the media element, and therefore also from the videotracklist. 4536 vid...

AudioTrackList - Web APIs
. length read only the number of tracks in the list. event handlers onaddtrack an event handler to be called when the addtrack event is fired, indicating that a new audio track has been added to the media element. onchange an event handler to be called when the change event occurs. this occurs when one or more tracks have been enabled or disabled by their enabled flag being changed. onremovetrack an event handler to call when the removetrack event is sent, indicating that an audio track has been removed from the media element. methods this interface also inherits methods from its parent interface, eventtarget. gettrackbyid() returns the audiotrack found within the audiotracklist whose id matches the specified string. if no match is found, null is returned. events addtrack fi...
...specified string. if no match is found, null is returned. events addtrack fired when a new audio track has been added to the media element. also available via the onaddtrack property. change fired when a track has been enabled or disabled. also available via the onchange property. removetrack fired when a new audio track has been removed from the media element. also available via the onremovetrack property. usage notes in addition to being able to obtain direct access to the audio tracks present on a media element, audiotracklist lets you set event handlers on the addtrack and removetrack events, so that you can detect when tracks are added to or removed from the media element's stream. see onaddtrack and onremovetrack for details and examples. examples getting a media element's audio...
... a media element's audiotracklist, use its audiotracks property. var audiotracks = document.queryselector("video").audiotracks; monitoring track count changes in this example, we have an app that displays information about the number of channels available. to keep it up to date, handlers for the addtrack and removetrack events are set up. audiotracks.onaddtrack = updatetrackcount; audiotracks.onremovetrack = updatetrackcount; function updatetrackcount(event) { trackcount = audiotracks.length; drawtrackcountindicator(trackcount); } specifications specification status comment html living standardthe definition of 'audiotracklist' in that specification. living standard html5the definition of 'audiotracklist' in that specification. recommendation ...

TextTrackList - Web APIs
for example. properties this interface also inherits properties from its parent interface, eventtarget. length read only the number of tracks in the list. event handlers onaddtrack an event handler to be called when the addtrack event is fired, indicating that a new text track has been added to the media element. onchange an event handler to be called when the change event occurs. onremovetrack an event handler to call when the removetrack event is sent, indicating that a text track has been removed from the media element. methods this interface also inherits methods from its parent interface, eventtarget. gettrackbyid() returns the texttrack found within the texttracklist whose id matches the specified string. if no match is found, null is returned. events addtrack fired ...
...ed string. if no match is found, null is returned. events addtrack fired when a new text track has been added to the media element. also available via the onaddtrack property. change fired when a text track has been made active or inactive. also available via the onchange property. removetrack fired when a new text track has been removed from the media element. also available via the onremovetrack property. usage notes in addition to being able to obtain direct access to the text tracks present on a media element, texttracklist lets you set event handlers on the addtrack and removetrack events, so that you can detect when tracks are added to or removed from the media element's stream. see onaddtrack and onremovetrack for details and examples. examples getting a video element's text tr...
...to get a media element's texttracklist, use its texttracks property. var texttracks = document.queryselector("video").texttracks; monitoring track count changes in this example, we have an app that displays information about the number of channels available. to keep it up to date, handlers for the addtrack and removetrack events are set up. texttracks.onaddtrack = updatetrackcount; texttracks.onremovetrack = updatetrackcount; function updatetrackcount(event) { trackcount = texttracks.length; drawtrackcountindicator(trackcount); } specifications specification status comment html living standardthe definition of 'textracklist' in that specification. living standard ...

VideoTrackList - Web APIs
d track, if any, or −1 otherwise. event handlers onaddtrack an event handler to be called when the addtrack event is fired, indicating that a new video track has been added to the media element. onchange an event handler to be called when the change event occurs — that is, when the value of the selected property for a track has changed, due to the track being made active or inactive. onremovetrack an event handler to call when the removetrack event is sent, indicating that a video track has been removed from the media element. methods this interface also inherits methods from its parent interface, eventtarget. gettrackbyid() returns the videotrack found within the videotracklist whose id matches the specified string. if no match is found, null is returned. events addtrack fir...
...string. if no match is found, null is returned. events addtrack fired when a new video track has been added to the media element. also available via the onaddtrack property. change fired when a video track has been made active or inactive. also available via the onchange property. removetrack fired when a new video track has been removed from the media element. also available via the onremovetrack property. usage notes in addition to being able to obtain direct access to the video tracks present on a media element, videotracklist lets you set event handlers on the addtrack and removetrack events, so that you can detect when tracks are added to or removed from the media element's stream. see onaddtrack and onremovetrack for details and examples. examples getting a media element's video...
... a media element's videotracklist, use its videotracks property. var videotracks = document.queryselector("video").videotracks; monitoring track count changes in this example, we have an app that displays information about the number of channels available. to keep it up to date, handlers for the addtrack and removetrack events are set up. videotracks.onaddtrack = updatetrackcount; videotracks.onremovetrack = updatetrackcount; function updatetrackcount(event) { trackcount = videotracks.length; drawtrackcountindicator(trackcount); } specifications specification status comment html living standardthe definition of 'videotracklist' in that specification. living standard ...

Signaling and video calling - Web APIs
) { mypeerconnection = new rtcpeerconnection({ iceservers: [ // information about ice servers - use your own! ...
... media to an element to display it, for example. see receiving new streams for details. rtcpeerconnection.onnegotiationneeded this function is called whenever the webrtc infrastructure needs you to start the session negotiation process anew. its job is to create and send an offer, to the callee, asking it to connect with us. see starting negotiation to see how we handle this. rtcpeerconnection.onremovetrack this counterpart to ontrack is called to handle the removetrack event; it's sent to the rtcpeerconnection when the remote peer removes a track from the media being sent. see handling the removal of tracks. rtcpeerconnection.oniceconnectionstatechange the iceconnectionstatechange event is sent by the ice layer to let you know about changes to the state of the ice connection. this can help you k...
... ending the call the closevideocall() function, shown below, is responsible for stopping the streams, cleaning up, and disposing of the rtcpeerconnection object: function closevideocall() { var remotevideo = document.getelementbyid("received_video"); var localvideo = document.getelementbyid("local_video"); if (mypeerconnection) { mypeerconnection.ontrack = null; mypeerconnection.onremovetrack = null; mypeerconnection.onremovestream = null; mypeerconnection.onicecandidate = null; mypeerconnection.oniceconnectionstatechange = null; mypeerconnection.onsignalingstatechange = null; mypeerconnection.onicegatheringstatechange = null; mypeerconnection.onnegotiationneeded = null; if (remotevideo.srcobject) { remotevideo.srcobject.gettracks().foreach(track => ...

MediaStream - Web APIs
its value is ended for the track or tracks you want to ensure have finished playing. mediastream.id read only a domstring containing 36 characters denoting a universally unique identifier (uuid) for the object. event handlers mediastream.onaddtrack an eventhandler containing the action to perform when an addtrack event is fired when a new mediastreamtrack object is added. mediastream.onremovetrack an eventhandler containing the action to perform when a removetrack event is fired when a mediastreamtrack object is removed from it. methods this interface inherits methods from its parent, eventtarget. mediastream.addtrack() stores a copy of the mediastreamtrack given as argument. if the track has already been added to the mediastream object, nothing happens. mediastream.clone() re...
...ther, but also from one call to another. mediastream.removetrack() removes the mediastreamtrack given as argument. if the track is not part of the mediastream object, nothing happens. events addtrack fired when a new mediastreamtrack object is added. also available via the onaddtrack property. removetrack fired when a mediastreamtrack object has been removed. also available via the onremovetrack property. active fired when the mediastream is activated. inactive fired when the mediastream is inactivated. specifications specification status comment media capture and streamsthe definition of 'mediastream' in that specification. candidate recommendation ...

AudioTrackList: removetrack event - Web APIs
the removetrack event is fired when a track is removed from an audiotracklist. bubbles no cancelable no interface trackevent event handler property onremovetrack examples using addeventlistener(): const videoelement = document.queryselector('video'); videoelement.audiotracks.addeventlistener('removetrack', (event) => { console.log(`audio track: ${event.track.label} removed`); }); using the onremovetrack event handler property: const videoelement = document.queryselector('video'); videoelement.audiotracks.onremovetrack = (event) => { console.log(`audio track: ${event.track.label} removed`); }; specifications specification status html living standardthe definition of 'removetrack' in that specification. living st...

MediaDevices - Web APIs
selector('video'); var constraints = window.constraints = { audio: false, video: true }; var errorelement = document.queryselector('#errormsg'); navigator.mediadevices.getusermedia(constraints) .then(function(stream) { var videotracks = stream.getvideotracks(); console.log('got stream with constraints:', constraints); console.log('using video device: ' + videotracks[0].label); stream.onremovetrack = function() { console.log('stream ended'); }; window.stream = stream; // make variable available to browser console video.srcobject = stream; }) .catch(function(error) { if (error.name === 'constraintnotsatisfiederror') { errormsg('the resolution ' + constraints.video.width.exact + 'x' + constraints.video.height.exact + ' px is not supported by your device.'); } else if...

MediaStream: removetrack event - Web APIs
the removetrack event is fired when a new mediastreamtrack object has been removed from a mediastream. bubbles no cancelable no interface mediastreamtrackevent event handler property onremovetrack examples using addeventlistener(): let stream = new mediastream(); stream.addeventlistener('removetrack', (event) => { console.log(`${event.track.kind} track removed`); }); using the onremovetrack event handler property: let stream = new mediastream(); stream.onremovetrack = (event) => { console.log(`${event.track.kind} track removed`); }; specifications specification status media capture and streamsthe definition of 'removetrack' in that specification. candidate recommendation ...

RTCPeerConnection.onremovestream - Web APIs
the rtcpeerconnection api is now track-based, so having zero tracks in the remote stream is equivalent to the remote stream being removed and the old removestream event. the rtcpeerconnection.onremovestream event handler is a property containing the code to execute when the removestream event, of type mediastreamevent, is received by this rtcpeerconnection. ...

RTCPeerConnection: removestream event - Web APIs
he counterpart to the addstream event, which is also obsolete. bubbles no cancelable no interface mediastreamevent event handler property rtcpeerconnection.onremovestream important: this event has been removed from the webrtc specification in favor of the existing removetrack event on the remote mediastream and the corresponding mediastream.onremovetrack event handler property of the remote mediastream. the rtcpeerconnection api is now track-based, so having zero tracks in the remote stream is equivalent to the remote stream being removed, which caused a removestream event. ...