EventSource: error event

The error event of the EventSource API is fired when a connection with an event source fails to be opened.

Bubbles No
Cancelable No
Interface Event or ErrorEvent
Event handler property EventSource.onerror

Examples

var evtSource = new EventSource('sse.php');

// addEventListener version
evtSource.addEventListener('error', (e) => {
  console.log("An error occurred while attempting to connect.");
});

// onerror version
evtSource.onerror = (e) => {
  console.log("An error occurred while attempting to connect.");
};

Specifications

Specification Status
HTML Living Standard
The definition of 'error event' in that specification.		 Living Standard

Browser compatibility

BCD tables only load in the browser

See also