This is an experimental technologyCheck the Browser compatibility table carefully before using this in production.
The read-only RTCDataChannel
property protocol
returns a DOMString
containing the name of the subprotocol in use. If no protocol was specified when the data channel was created, then this property's value is "" (the empty string).
The permitted values of this property are defined by the Web site or app using the data channel.
The ability for each channel to have a defined subprotocol lets your app, for example, use JSON objects as messages on one channel while another channel is plaintext and another is raw binary or even some other format.
Syntax
var subProtocol = aDataChannel.protocol;
Value
A string identifying the app-defined subprotocol being used for exchanging data on the channel. If none has been established, this is an empty string ("").
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. | Candidate Recommendation | Initial specification. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Chrome
Full support 56 |
Edge
Full support ≤79 |
Firefox
Full support Yes |
IE
No support No |
Opera
Full support 43 |
Safari
No support No |
WebView Android
Full support 56 |
Chrome Android
Full support 56 |
Firefox Android
Full support Yes |
Opera Android
Full support 43 |
Safari iOS
No support No |
Samsung Internet Android
Full support 6.0 |
Legend
- Full support
- Full support
- No support
- No support
- Experimental. Expect behavior to change in the future.'
- Experimental. Expect behavior to change in the future.
See also
RTCDataChannel.protocol by Mozilla Contributors is licensed under CC-BY-SA 2.5.