onunload event

DOM Events Event Object

Definition and usage

The onunload event occurs once the page has been unloaded (or the browser window has been closed).

When the user leaves the page (by clicking a link, submitting a form, closing the browser window, etc.),

Note:When the user reloads the page (and onload Event). Also triggers the onunload event.

Example

Execute JavaScript when the user unloads the document:

<body onunload="myFunction()">

Try it yourself

Syntax

In HTML:

<element onunload="myScript">

Try it yourself

In JavaScript:

object.onunload = function(){myScript};

Try it yourself

In JavaScript, use the addEventListener() method:

object.addEventListener("unload", myScript);

Try it yourself

Note:Internet Explorer 8 or earlier versions do not support addEventListener() method.

Technical details

Bubble: Not supported
Cancelable: Not supported
Event type: If generated from the user interface,UiEvent. Otherwise Event.
Supported HTML tags: <body>
DOM Version: Level 2 Events

Browser Support

Events Chrome IE Firefox Safari Opera
onunload Support Support Support Support Support

Note:Due to different browser settings, this event may not always work as expected.

DOM Events Event Object