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HTML onunload Event Attribute

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Contents
  1. Example
  2. Browser Support
  3. 1. Definition and Usage
  4. 2. Differences Between HTML 4.01 and HTML5
  5. 3. Syntax
  6. 4. Attribute Values

Example

Execute a JavaScript when a user unloads the document:

<body onunload=”goodbye()”>

Browser Support

Internet Explorer Firefox Opera Google Chrome Safari

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

1 <element onunload="script">

4. Attribute Values

Value Description
script The script to be run on onunload
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