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:

  1. RTCDataChannel.readyState is set to "closing".
  2. A background task is established to handle the remainder of the steps below, and close() returns to the caller.
  3. The transport layer deals with any buffered messages; the protocol layer decides whether to send them or discard them.
  4. The underlying data transport is closed.
  5. The RTCDataChannel.readyState property is set to "closed".
  6. If the transport was closed with an error, the RTCDataChannel is sent a NetworkError event.
  7. 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().





Return value



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...


Specification Status Comment
WebRTC 1.0: Real-time Communication Between Browsers
The definition of 'RTCDataChannel.close()' in that specification.
Candidate Recommendation Initial specification.

Browser compatibility

ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
closeChrome Full support 56Edge Full support ≤79Firefox Full support YesIE No support NoOpera Full support 43Safari No support NoWebView Android Full support 56Chrome Android Full support 56Firefox Android Full support YesOpera Android Full support 43Safari iOS No support NoSamsung Internet Android Full support 6.0


Full support
Full support
No support
No support

See also