ExampleExecute a JavaScript when a user unloads the document:
<body onunload="goodbye()">
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Browser Support
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1. Definition and Usage
The onunload attribute fires once a page has unloaded (or the browser window has been closed).
onunload occurs when the user navigates away from the page (by clicking on a link, submitting a form, closing the browser window, etc.)
Note: If you reload a page, you will also trigger the unload event (and the onload event).
2. Differences Between HTML 4.01 and HTML5
None.
3. Syntax
<element onunload="script">
4. Attribute Values
| Value | Description |
|---|---|
| script | The script to be run on onunload |
