Web/API/RTCDataChannel/onerror

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

The RTCDataChannel.onerror property is an EventHandler which specifies a function to be called when the error event is received. When an error occurs on the data channel, the function receives as input an ErrorEvent object describing the error which occurred.

Syntax

RTCDataChannel.onerror = function;

Value

A function which the browser will call to handle the error event when it occurs on the data channel. This function receives as its only input an ErrorEvent object describing the event which was received. That event object, in turn, describes the error that took place.

Example

In the example below, a data channel is established, and an onerror handler is added to it. The error handler passes information about the error to a UI library's alert box function to present an error message to the user.

let pc = new RTCPeerConnection();
let dc = pc.createDataChannel("PlayerControl");

dc.onerror = function(event) {
  myUILibrary.doAlertBox({
    'Network Error',        // Alert title
    'The error "' + event.message +
           '" occurred while handling player control network messages.',
    event.filename,
    event.lineno,
    event.colno
  });
}

/* ... */

Specifications

Specification	Status	Comment
WebRTC 1.0: Real-time Communication Between BrowsersThe definition of 'RTCDataChannel.onerror' in that specification.	Candidate Recommendation	Initial specification.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`onerror` Experimental'	Chrome Full support 56	Edge Full support ≤79	Firefox No support No	IE No support No	Opera Full support 43	Safari No support No	WebView Android Full support 56	Chrome Android Full support 56	Firefox Android No support No	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.