RTCDataChannel.maxRetransmits - Web APIs
the read-only rtcdatachannel property maxretransmits returns the maximum number of times the browser should try to retransmit a message before giving up, as set when the data channel was created, or null, which indicates that there is no maximum.
... this can only be set when the rtcdatachannel is created by calling rtcpeerconnection.createdatachannel(), using the maxretransmits field in the specified options.
... syntax var tries = adatachannel.maxretransmits; value the maximum number of times the browser will try to retransmit a message before giving up, or null if not set when rtcpeerconnection.createdatachannel() was called.
... example // tbd specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannel.maxretransmits' in that specification.

RTCDataChannel.onclose - Web APIs
the rtcdatachannel.onclose property is an eventhandler which specifies a function to be called by the browser when the close event is received by the rtcdatachannel.
... syntax rtcdatachannel.onclose = function; value a function which the browser will call to handle the close event.
... let pc = new rtcpeerconnection(); let dc = pc.createdatachannel("messagechannel")}}; dc.onopen = function(event) { document.getelementbyid("messagebox").disabled = false; document.getelementbyid("sendbutton").disabled = false; }; dc.onclose = function(event) { document.getelementbyid("messagebox").disabled = true; document.getelementbyid("sendbutton").disabled = true; } /* now negotiate the connection, etc...
... */ specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannel.onclose' in that specification.

RTCDataChannel.onerror - Web APIs
the rtcdatachannel.onerror property is an eventhandler which specifies a function to be called when the error event is received.
... syntax rtcdatachannel.onerror = function; value a function which the browser will call to handle the error event when it occurs on the data channel.
... let pc = new rtcpeerconnection(); let dc = pc.createdatachannel("playercontrol"); dc.onerror = function(event) { myuilibrary.doalertbox({ 'network error', // alert title 'the error "' + event.message + '" occurred while handling player control network messages.', event.filename, event.lineno, event.colno }); } /* ...
... */ specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannel.onerror' in that specification.

RTCDataChannel.ordered - Web APIs
the read-only rtcdatachannel property ordered indicates whether or not the data channel guarantees in-order delivery of messages; the default is true, which indicates that the data channel is indeed ordered.
... this is set when the rtcdatachannel is created, by setting the ordered property on the rtcdatachannelinit object passed as rtcpeerconnection.createdatachannel()'s options parameter.
... syntax var ordered = adatachannel.ordered; a boolean value which is true if in-order delivery is guaranteed and is otherwise false.
... example var pc = new rtcpeerconnection(); var dc = pc.createdatachannel("my channel"); if (!dc.ordered) { // handle unordered messaging } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannel.ordered' in that specification.

RTCDataChannel.send() - Web APIs
the send() method of the rtcdatachannel interface sends data across the data channel to the remote peer.
... syntax rtcdatachannel.send(data); parameters data the data to transmit across the connection.
... example in this example, a routine called sendmessage() is created; it accepts an object as input and sends to the remote peer, over the rtcdatachannel, a json string with the specified object and a time stamp.
... var pc = new rtcpeerconnection(); var dc = pc.createdatachannel("backchannel"); function sendmessage(msg) { let obj = { "message": msg, "timestamp": new date() } dc.send(json.stringify(obj)); } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannel.send()' in that specification.

RTCDataChannelEvent.channel - Web APIs
the read-only property rtcdatachannelevent.channel returns the rtcdatachannel associated with the event.
... syntax var channel = rtcdatachannelevent.channel; value a rtcdatachannel object representing the data channel linking the receiving rtcpeerconnection to its remote peer.
... example the first line of code in the datachannel event handler shown below takes the channel from the event object and saves it locally for use by the code handling data traffic.
... pc.ondatachannel = function(event) { inbounddatachannel = event.channel; inbounddatachannel.onmessage = handleincomingmessage; inbounddatachannel.onopen = handlechannelopen; inbounddatachannel.onclose = handlechannelclose; } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannelevent.channel' in that specification.

RTCPeerConnection: datachannel event - Web APIs
a datachannel event is sent to an rtcpeerconnection instance when an rtcdatachannel has been added to the connection, as a result of the remote peer calling rtcpeerconnection.createdatachannel().
... bubbles no cancelable no interface rtcdatachannelevent event handler property ondatachannel examples this example sets up a function that handles datachannel events by gathering the information needed to communicate with the newly added rtcdatachannel and by adding event handlers for the events that occur on that channel.
... pc.addeventlistener("datachannel", ev => { receivechannel = ev.channel; receivechannel.onmessage = myhandlemessage; receivechannel.onopen = myhandleopen; receivechannel.onclose = myhandleclose; }, false); receivechannel is set to the value of the event's channel property, which specifies the rtcdatachannel object representing the data channel linking the remote peer to the local one.
... this same code can also instead use the rtcpeerconnection interface's ondatachannel event handler property, like this: pc.ondatachannel = ev => { receivechannel = ev.channel; receivechannel.onmessage = myhandlemessage; receivechannel.onopen = myhandleopen; receivechannel.onclose = myhandleclose; } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'datachannel' in that specification.

RTCDataChannel.binaryType - Web APIs
the property binarytype on the rtcdatachannel interface is a domstring which specifies the type of javascript object which should be used to represent binary data received on the rtcdatachannel.
... syntax var type = adatachannel.binarytype; adatachannel.binarytype = type; value a domstring that can have one of these values: "blob" received binary messages' contents will be contained in blob objects.
... var dc = peerconnection.createdatachannel("binary"); dc.binarytype = "arraybuffer"; dc.onmessage = function(event) { let bytearray = new uint8array(event.data); let hexstring = ""; bytearray.foreach(function(byte) { hexstring += byte.tostring(16) + " "; }); }; specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannel.binarytype' in that specification.

RTCDataChannel.bufferedAmountLowThreshold - Web APIs
the rtcdatachannel property bufferedamountlowthreshold is used to specify the number of bytes of buffered outgoing data that is considered "low." the default value is 0.
... syntax var threshold = adatachannel.bufferedamountlowthreshold; adatachannel.bufferedamountlowthreshold = threshold; value the number of queued outgoing data bytes below which the buffer is considered to be "low." example in this snippet of code, bufferedamountlowthreshold is set to 64kb, and a handler for the bufferedamountlow event is established by setting the rtcdatachannel.onbufferedamountlow property to a function which...
... var dc = peerconnection.createdatachannel("file transfer"); dc.bufferedamountlowthreshold = 65535; dc.onbufferedamountlow = function() { /* use send() to queue more data to be sent */ }; specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannel.bufferedamountlowthreshold' in that specification.

RTCDataChannel: close event - Web APIs
the close event is sent to the onclose event handler on an rtcdatachannel instance when the data transport being used for the data channel has closed.
... before any further data can be transferred using rtcdatachannel, a new data channel instance must be created.
... bubbles no cancelable no interface event event handler property rtcdatachannel.onclose examples this example sets up a handler for the close event for the rtcdatachannel named dc; its responsibility in this example is to update user interface elements to reflect that there is no longer an ongoing call, and to allow a new call to be started.

RTCDataChannel: message event - Web APIs
the webrtc message event is sent to the onmessage event handler on an rtcdatachannel object when a message has been received from the remote peer.
... examples for a given rtcdatachannel, dc, created for a peer connection using its createdatachannel() method, this code sets up a handler for incoming messages and acts on them by adding the data contained within the message to the current document as a new <p> (paragraph) element.
... you can also use an rtcdatachannel object's onmessage event handler property to set the event handler: dc.onmessage = ev => { let newparagraph = document.createelement("p"); let textnode = document.createtextnode(event.data); newparagraph.appendchild(textnode); document.body.appendchild(newparagraph); } specifications specification status comment webrtc 1.0: real-time communication between brow...

RTCDataChannel.negotiated - Web APIs
the read-only rtcdatachannel property negotiated indicates whether the rtcdatachannel's connection was negotiated by the web app (true) or by the webrtc layer (false).
... syntax var negotiated = adatachannel.negotiated; value true if the rtcdatachannel's connection was negotiated by the web app itself; false if the negotiation was handled by the webrtc layer.
... if (datachannel.negotiated) { shutdownremotechannel(datachannel.id); } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannel.negotiated' in that specification.

RTCDataChannel.onmessage - Web APIs
the rtcdatachannel.onmessage property stores an eventhandler which specifies a function to be called when the message event is fired on the channel.
... syntax rtcdatachannel.onmessage = function; value a function which the browser will call to handle the message event.
... let pc = new rtcpeerconnection(); let dc = pc.createdatachannel(); dc.onmessage = function(event) { var el = document.createelement("p"); var txtnode = document.createtextnode(event.data); el.appendchild(txtnode); receivebox.appendchild(el); } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannel.onmessage' in that specification.

RTCDataChannel.onopen - Web APIs
the rtcdatachannel.onopen property is an eventhandler which specifies a function to be called when the open event is fired; this is a simple event which is sent when the data channel's underlying data transport—the link over which the rtcdatachannel's messages flow—is established or re-established.
... syntax rtcdatachannel.onopen = function; value a function which the browser will call to handle the open event.
... let dc = mypeerconnection.createdatachannel("message channel"); dc.onopen = function(event) { let messagebox = document.getelementbyid("messagebox"); let sendbutton = document.getelementbyid("sendbutton"); messagebox.disabled = false; messagebox.focus(); sendbutton.disabled = false; } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannel.onopen' in t...

RTCDataChannel.protocol - Web APIs
the read-only rtcdatachannel property protocol returns a domstring containing the name of the subprotocol in use.
... syntax var subprotocol = adatachannel.protocol; value a string identifying the app-defined subprotocol being used for exchanging data on the channel.
... example var pc = new rtcpeerconnection(); var dc = pc.createdatachannel("my channel", { protocol: "json" }); function handlechannelmessage(datachannel, msg) { switch(datachannel.protocol) { case "json": /* process json data */ break; case "raw": /* process raw binary data */ break; } } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannel.protocol' in that specification.

RTCDataChannel.reliable - Web APIs
the read-only rtcdatachannel property reliable indicates whether or not the data channel is reliable.
...use rtcdatachannel.ordered instead in any new code, and update existing code as soon as possible.
... syntax var reliable = adatachannel.reliable; value true if the rtcdatachannel's connection is reliable; false if it isn't.

RTCDataChannel: bufferedamountlow event - Web APIs
a bufferedamountlow event is sent to an rtcdatachannel when the number of bytes currently in the outbound data transfer buffer falls below the threshold specified in bufferedamountlowthreshold.
... let pc = new rtcpeerconnection(); let dc = pc.createdatachannel("sendfile"); let source = /* source data object */ dc.bufferedamountlowthreshold = 65536; pc.addeventlistener("bufferedamountlow", ev => { if (source.position <= source.length) { dc.send(source.readfile(65536)); } }, false); after creating the rtcpeerconnection, this calls rtcpeerconnection.createdatachannel() to create the data channel.

RTCDataChannel: error event - Web APIs
a webrtc error event is sent to an rtcdatachannel object's onerror error handler when an error occurs on the data channel.
... you can also set up an event handler for error events using the rtcdatachannel interface's onerror event handler property: dc.onerror = ev => { const err = ev.error; /* ...

RTCDataChannel: open event - Web APIs
the webrtc open event is sent to an rtcdatachannel object's onopen event handler when the underlying transport used to send and receive the data channel's messages is opened or re-opened.
... bubbles no cancelable no interface rtcdatachannelevent event handler property onopen examples this example adds to the rtcdatachannel dc a handler for the open event that adjusts the user interface to indicate that a chat window is ready to be used after a connection has been established.

Index - Web APIs
3228 rtcdatachannel api, communication, data transfer, experimental, interface, media, networking, rtcdatachannel, reference, webrtc, webrtc api the rtcdatachannel interface represents a network channel which can be used for bidirectional peer-to-peer transfers of arbitrary data.
... 3229 rtcdatachannel.binarytype experimental, property, rtcdatachannel, reference, webrtc, binarytype the property binarytype on the rtcdatachannel interface is a domstring which specifies the type of javascript object which should be used to represent binary data received on the rtcdatachannel.
... 3230 rtcdatachannel.bufferedamount experimental, property, rtcdatachannel, read-only, reference, webrtc, bufferedamount the read-only rtcdatachannel property bufferedamount returns the number of bytes of data currently queued to be sent over the data channel.
...And 33 more matches

Using WebRTC data channels - Web APIs
since all webrtc components are required to use encryption, any data transmitted on an rtcdatachannel is automatically secured using datagram transport layer security (dtls).
... creating a data channel the underlying data transport used by the rtcdatachannel can be created in one of two ways: let webrtc create the transport and announce it to the remote peer for you (by causing it to receive a datachannel event).
... automatic negotiation often, you can allow the peer connection to handle negotiating the rtcdatachannel connection for you.
...And 11 more matches

WebRTC API - Web APIs
once a connection has been established and opened using rtcpeerconnection, media streams (mediastreams) and/or data channels (rtcdatachannels) can be added to the connection.
... you can also use the connection between two peers to exchange arbitrary binary data using the rtcdatachannel interface.
... rtcdatachannel represents a bi-directional data channel between two peers of a connection.
...And 8 more matches

RTCPeerConnection - Web APIs
this happens whenever the aggregate state of the connection changes.ondatachannel the rtcpeerconnection.ondatachannel property is an eventhandler which specifies a function which is called when the datachannel event occurs on an rtcpeerconnection.
... this event, of type rtcdatachannelevent, is sent when an rtcdatachannel is added to the connection by the remote peer calling createdatachannel().onicecandidatethe rtcpeerconnection property onicecandidate property is an eventhandler which specifies a function to be called when the icecandidate event occurs on an rtcpeerconnection instance.
...the answer is delivered to the returned promise, and should then be sent to the source of the offer to continue the negotiation process.createdatachannel() the createdatachannel() method on the rtcpeerconnection interface creates a new channel linked with the remote peer, over which any kind of data may be transmitted.createoffer()the createoffer() method of the rtcpeerconnection interface initiates the creation of an sdp offer for the purpose of starting a new webrtc connection to a remote peer.generatecertificate()the generatecertificate() meth...
...And 2 more matches

RTCError - Web APIs
examples in this example, a handler is established for an rtcdatachannel's error event.
... datachannel.addeventlistener("error", (event) => { let error = event.error; if (error.errordetail === "sdp-syntax-error") { let errline = error.sdplinenumber; let errmessage = error.message; let alertmessage = `a syntax error occurred interpreting line ${errline} of the sdp: ${errmessage}`; showmyalertmessage("data channel error", alertmessage); } else { terminatemyconnection(); } }); if the error is an sdp syntax error—indicated by its errordetail property being sdp-syntax-error—, a message string is constructed to present the error message and the line number within the sdp at which the error occurred.
...you can also use the rtcdatachannel object's onerror event handler property, like this: datachannel.onerror = (event) => { let error = event.error; /* and so forth */ }; specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcerror' in that specification.

RTCErrorEvent.error - Web APIs
examples in this example, a handler is established for an rtcdatachannel's error event.
... datachannel.addeventlistener("error", (event) => { let error = event.error; if (error.errordetail === "sdp-syntax-error") { let errline = error.sdplinenumber; let errmessage = error.message; let alertmessage = `a syntax error occurred interpreting line ${errline} of the sdp: ${errmessage}`; showmyalertmessage("data channel error", alertmessage); } else { terminatemyconnection(); } }); if the error is an sdp syntax error—indicated by its errordetail property being sdp-syntax-error—, a message string is constructed to present the error message and the line number within the sdp at which the error occurred.
...you can also use the rtcdatachannel object's onerror event handler property, like this: datachannel.onerror = (event) => { let error = event.error; /* and so forth */ }; specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcerrorevent.error' in that specification.

RTCDtlsTransport - Web APIs
when not using bundle when the connection is created without using bundle, each rtp or rtcp component of each rtcrtptransceiver has its own rtcdtlstransport; that is, every rtcrtpsender and rtcrtpreceiver, has its own transport, and all rtcdatachannel objects share a transport dedicated to sctp.
... data channels rtcdatachannels use sctp to communicate.

RTCPeerConnection.sctp - Web APIs
the sctp transport is used for transmitting and receiving data for any and all rtcdatachannels on the peer connection.
... example var pc = new rtcpeerconnection(); var channel = pc.createdatachannel("mydata"); channel.onopen = function(event) { channel.send('sending a message'); } channel.onmessage = function(event) { console.log(event.data); } // determine the largest message size that can be sent var sctp = pc.sctp; var maxmessagesize = sctp.maxmessagesize; specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnection.sctp' in that specification.

RTCSctpTransport - Web APIs
properties also inherits properties from: eventtarget rtcsctptransport.maxchannelsread only an integer value indicating the maximum number of rtcdatachannels that can be open simultaneously.
... rtcsctptransport.maxmessagesizeread only an integer value indicating the maximum size, in bytes, of a message which can be sent using the rtcdatachannel.send() method.

WebRTC Statistics API - Web APIs
rtcrtpcontributingsourcestats rtcstats data-channel statistics related to one rtcdatachannel on the connection.
... rtcdatachannelstats rtcstats ice-server statistics about the connection to an ice server (stun or turn.

WebRTC - MDN Web Docs Glossary: Definitions of Web-related terms
rtcdatachannel provides a method to set up a peer-to-peer data pathway between browsers.

Event - Web APIs
event domtransactionevent dragevent editingbeforeinputevent errorevent fetchevent focusevent gamepadevent hashchangeevent idbversionchangeevent inputevent keyboardevent mediastreamevent messageevent mouseevent mutationevent offlineaudiocompletionevent overconstrainederror pagetransitionevent paymentrequestupdateevent pointerevent popstateevent progressevent relatedevent rtcdatachannelevent rtcidentityerrorevent rtcidentityevent rtcpeerconnectioniceevent sensorevent storageevent svgevent svgzoomevent timeevent touchevent trackevent transitionevent uievent userproximityevent webglcontextevent wheelevent constructor event() creates an event object, returning it to the caller.

MessageEvent - Web APIs
webrtc data channels (see rtcdatachannel.onmessage).

RTCConfiguration.bundlePolicy - Web APIs
max-compat the ice agent intially creates one rtcdtlstransport for each media track and a separate one for the rtcdatachannel, if one is created.

RTCPeerConnection.close() - Web APIs
example var pc = new rtcpeerconnection(); var dc = pc.createdatachannel("my channel"); dc.onmessage = function (event) { console.log("received: " + event.data); pc.close(); // we decided to close after the first received message }; dc.onopen = function () { console.log("datachannel open"); }; dc.onclose = function () { console.log("datachannel close"); }; specifications specification status comment webrtc 1.0: real-time commun...

RTCPeerConnectionIceEvent - Web APIs
there is no specific rtcdatachannelevent method.

RTCRtpTransceiver - Web APIs
each sdp media section describes one bidirectional srtp ("secure real time protocol") stream (excepting the media section for rtcdatachannel, if present).

RTCStats.id - Web APIs
using the id, you can correlate two or more rtcstats-based objects in order to monitor statistics over time for a given webrtc object, such as an rtp stream, an rtcpeerconnection, or an rtcdatachannel.

RTCStatsReport - Web APIs
data-channel an rtcdatachannelstats object which contains statistics about each rtcdatachannel on the connection.

RTCStatsType - Web APIs
data-channel an rtcdatachannelstats object which contains statistics about each rtcdatachannel on the connection.

Web APIs
plugin pluginarray point pointerevent popstateevent positionoptions processinginstruction progressevent promiserejectionevent publickeycredential publickeycredentialcreationoptions publickeycredentialrequestoptions pushevent pushmanager pushmessagedata pushregistrationmanager pushsubscription r rtcansweroptions rtccertificate rtcconfiguration rtcdtmfsender rtcdtmftonechangeevent rtcdatachannel rtcdatachannelevent rtcdtlstransport rtcerror rtcerrorevent rtcicecandidate rtcicecandidateinit rtcicecandidatepair rtcicecandidatepairstats rtcicecandidatestats rtcicecandidatetype rtcicecomponent rtcicecredentialtype rtcicegathererstate rtciceparameters rtciceprotocol rtcicerole rtciceserver rtcicetcpcandidatetype rtcicetransport rtcicetransportstate rtcidentityassertion rtcidentityer...