This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
The RTCDataChannel.close()
method closes the RTCDataChannel
. Either peer is permitted to call this method to initiate closure of the channel.
Closure of the data channel is not instantaneous. Most of the process of closing the connection is handled asynchronously; you can detect when the channel has finished closing by watching for a close
event on the data channel.
The sequence of events which occurs in response to this method being called:
RTCDataChannel.readyState
is set to"closing"
.- A background task is established to handle the remainder of the steps below, and
close()
returns to the caller. - The transport layer deals with any buffered messages; the protocol layer decides whether to send them or discard them.
- The underlying data transport is closed.
- The
RTCDataChannel.readyState
property is set to"closed"
. - If the transport was closed with an error, the
RTCDataChannel
is sent aNetworkError
event. - A
close
event is sent to the channel.
In Firefox, the RTCDataChannel
interface was implemented under the name DataChannel
until Firefox 24, so this method was called DataChannel.close()
.
Syntax
RTCDataChannel.close();
This method has no input parameters, and returns nothing.
Example
var pc = new RTCPeerConnection(); var dc = pc.createDataChannel("my channel"); dc.onmessage = function (event) { console.log("received: " + event.data); dc.close(); // We decided to close after the first received message }; dc.onopen = function () { console.log("datachannel open"); }; dc.onclose = function ( console.log("datachannel close"); }; // Now negotiate the connection and so forth...
Specifications
Specification | Status | Comment |
---|---|---|
WebRTC 1.0: Real-time Communication Between Browser The definition of 'RTCDataChannel.close()' in that specification. |
Working Draft | Initial specification. |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | 23 | 22 (22) [1] | No support | (Yes) | ? |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | ? | 28 [2] | 22 (22) [1] | No support | ? | ? |
[1] The interface is called DataChannel
and not RTCDataChannel
in Firefox. However, a binding has been in place since Firefox 24 so that either name will work.
[2] WebRTC was available behind a flag in Chrome 28 for Android, and was enabled by default starting in Chrome 29.