onerror Event
Example
Do something if a problem occurs with the event stream:
var source = new EventSource("demo_sse.php");
source.onerror = function() {
// Do something to handle error
};
Definition and Usage
The onerror event occurs when an error occurs with the event source.
An error usually occurs when a connection is disrupted. If this happens, the EventSource object will automatically attempt to reconnect to the server.
Related events:
- onmessage - Occurs when a message is received
- onopen - Occurs when a connection to the server is open
For more information about Server-Sent Events, read our HTML5 Server-Sent Events Tutorial.
Browser Support
The numbers in the table specify the first browser version that fully supports the event.
| Event | |||||
|---|---|---|---|---|---|
| onerror | 9.0 | Not supported | 6.0 | 5.0 | 11.0 |
Syntax
object.onerror = function(){myScript};
Using the addEventListener() method:
object.addEventListener("error", myScript);
Note: The addEventListener() method is not supported in Internet Explorer 8 and earlier versions.
Technical Details
| Bubbles: | No |
|---|---|
| Cancelable: | No |
| Event type: | Event |
❮ Event Object
