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HTML onunload Event Attribute

HTML Event Attributes HTML Event Attributes


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

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



<element onunload="script">

Attribute Values

Value Description
script The script to be run on onunload

HTML Event Attributes HTML Event Attributes