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.ommessage
property stores an EventHandler
which specifies a function to be called when the message
event is fired on the channel. This event is represented by the MessageEvent
interface. This event is sent to the channel when a message is received from the other peer.
Syntax
RTCDataChannel.onmessage = function;
Value
A function which the browser will call to handle the message
event. The function receives as its sole input parameter a MessageEvent
object describing the event.
Example
This code snippet creates a peer connection, adds a data channel to it, and starts creating new <p>
(paragraph) elements each time a message arrives, with the message's contents displayed inside it. The new elements are then attached to the end of the document.
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 Browser The definition of 'RTCDataChannel.onmessage' in that specification. |
Working Draft | Initial specification. |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | (Yes) | 22 (22) [1] | No support | (Yes) | ? |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|
Basic support | No support | 28 [2] | 22.0 (22) [1] | No support | No support | No support | (Yes) |
[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, including RTCDataChannel
, was introduced in Chrome 28 for Android behind a flag, and enabled by default starting in Chrome 29 for Android.
See also
- WebRTC
RTCPeerConnection
RTCDataChannel
- The
message
event and its type,MessageEvent
.