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onunload Event
Example
Execute a JavaScript when a user unloads the document:
<body onunload="myFunction()">
Try it yourself »
Definition and Usage
The onunload event occurs 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: you will also trigger the unload event when a user relaods the page (and the onload event).
Syntax
In HTML:
<body
onunload="SomeJavaScriptCode">
In JavaScript:
window.onunload=function(){SomeJavaScriptCode};
| Parameter | Description |
|---|---|
| SomeJavaScriptCode | Required. Specifies a JavaScript to be executed when the event occurs |
Browser Support
The onunload event is supported in IE, Firefox, and Safari, but not supported properly in Chrome or Opera.
onunload is Supported by the Following HTML Tags:
<body>, <frameset>
Event Object
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