RTCDataChannel.onopen

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

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. The function receives as its only input parameter the event itself, of type Event.

Example

This example adds a new data channel to an existing RTCPeerConnection, myPeerConnection. It then establishes an open event handler which updates some user interface elements to prepare them for being used to send messages over the data channel.

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 Browsers
The definition of 'RTCDataChannel.onopen' in that specification.
Candidate Recommendation Initial specification.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
onopen
Experimental
Chrome Full support 56Edge ? Firefox No support NoIE No support NoOpera Full support 43Safari No support NoWebView Android Full support 56Chrome Android Full support 56Firefox Android No support NoOpera Android Full support 43Safari iOS No support NoSamsung Internet Android Full support 6.0

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

See also