HTML onoffline Event Attribute
Example
Execute a JavaScript when the browser starts to work offline:
<body onoffline="myFunction()">
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Definition and Usage
The onoffline attribute fires when the browser starts to work offline.
Tip: The onoffline attribute is the opposite of the ononline attribute.
Browser Support
The numbers in the table specify the first browser version that fully supports the event attribute.
| Event Attribute | |||||
|---|---|---|---|---|---|
| onoffline | Not supported | Deprecated as of IE11 8.0 |
3.0 | Not supported | Not supported |
Differences Between HTML 4.01 and HTML5
The onoffline attribute is new in HTML5.
Syntax
<element onoffline="script">
Attribute Values
| Value | Description |
|---|---|
| script | The script to be run on onoffline |
Technical Details
| Supported HTML tags: | <body> |
|---|
Related Pages
HTML DOM reference: onoffline event
❮ HTML Event Attributes
