Execute a JavaScript when the browser starts to work offline:
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.
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 |
In HTML:
In JavaScript:
In JavaScript, using the addEventListener() method:
Note: The addEventListener() method is not supported in Internet Explorer 8 and earlier versions.
Bubbles: | No |
---|---|
Cancelable: | No |
Event type: | Event |
Supported HTML tags: | <body> |
DOM Version: | Level 3 Events |