onoffline Event
Example
Execute a JavaScript when the browser starts to work offline:
<body onoffline="myFunction()">
Try it yourself »
Definition and Usage
The onoffline event occurs when the browser starts to work offline.
Tip: The onoffline event is the opposite of the ononline event.
Tip: You can also use the navigator.onLine property to find out whether the browser is in online or offline mode.
Browser Support
The numbers in the table specify the first browser version that fully supports the event.
| Event | |||||
|---|---|---|---|---|---|
| onoffline | Not supported | Deprecated as of IE11 8.0 |
3.0 | Not supported | Not supported |
Syntax
In HTML:
<element onoffline="myScript">Try it
In JavaScript:
object.onoffline=function(){myScript};Try it
In JavaScript, using the addEventListener() method:
object.addEventListener("offline", myScript);Try it
Note: The addEventListener() method is not supported in Internet Explorer 8 and earlier versions.
Technical Details
| Bubbles: | No |
|---|---|
| Cancelable: | No |
| Event type: | Event |
| Supported HTML tags: | <body> |
| DOM Version: | Level 3 Events |
Event Object
