onunload Event

Example

Call a function when a user unloads the document:

<body onunload="myFunction()">
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Description

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: The onunload event is also triggered when a user reloads the page (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.



Syntax

In HTML:

<element onunload="myScript">

In JavaScript:

object.onunload = function(){myScript};

In JavaScript, using the addEventListener() method:

object.addEventListener("unload", myScript);

Technical Details

Bubbles: No
Cancelable: No
Event type: UiEvent if generated from a user interface, Event otherwise.
HTML tags: <body>
DOM Version: Level 2 Events
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