Web/API/EventSource/onerror

 

The onerror property of the EventSource interface is an EventHandler called when an error occurs and the error event is dispatched on an EventSource object.

Syntax

eventSource.onerror = function

Examples

evtSource.onerror = function() {
  console.log("EventSource failed.");
};

Note: You can find a full example on GitHub — see Simple SSE demo using PHP.

Specifications

Specification	Status	Comment
HTML Living StandardThe definition of 'onerror' in that specification.	Living Standard	Initial definition

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	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
onerror	Chrome Full support 6	Edge Full support 79	Firefox Full support 6	IE No support No	Opera Full support Yes	Safari Full support 5	WebView Android Full support Yes	Chrome Android Full support 18	Firefox Android Full support 45	Opera Android Full support 12	Safari iOS Full support 5	Samsung Internet Android Full support 1.0

Legend

Full support  

Full support

No support  

No support

See also

• EventSource

EventSource.onerror by Mozilla Contributors is licensed under CC-BY-SA 2.5.