HTML onunload Event Attribute
Example
Execute a JavaScript when a user unloads the document:
<body onunload="myFunction()">
Try it Yourself »
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 onunload event (and the onload event).
Browser Support
| Event | |||||
|---|---|---|---|---|---|
| onunload | Yes | Yes | Yes | Yes | Yes |
Note: Due to different browser settings, this event may not always work as expected.
Differences Between HTML 4.01 and HTML5
None.
Syntax
<element onunload="script">
Attribute Values
| Value | Description |
|---|---|
| script | The script to be run on onunload |
❮ HTML Event Attributes
