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Browser BOM

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HTML DOM

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HTML Objects

<a> <abbr> <address> <area> <article> <aside> <audio> <b> <base> <bdo> <blockquote> <body> <br> <button> <canvas> <caption> <cite> <code> <col> <colgroup> <datalist> <dd> <del> <details> <dfn> <dialog> <div> <dl> <dt> <em> <embed> <fieldset> <figcaption> <figure> <footer> <form> <head> <header> <h1> - <h6> <hr> <html> <i> <iframe> <img> <ins> <input> button <input> checkbox <input> color <input> date <input> datetime <input> datetime-local <input> email <input> file <input> hidden <input> image <input> month <input> number <input> password <input> radio <input> range <input> reset <input> search <input> submit <input> text <input> time <input> url <input> week <kbd> <keygen> <label> <legend> <li> <link> <map> <mark> <menu> <menuitem> <meta> <meter> <nav> <object> <ol> <optgroup> <option> <output> <p> <param> <pre> <progress> <q> <s> <samp> <script> <section> <select> <small> <source> <span> <strong> <style> <sub> <summary> <sup> <table> <td> <th> <tr> <textarea> <time> <title> <track> <u> <ul> <var> <video>

Other Objects

CSSStyleDeclaration

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: 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);

Note: The addEventListener() method is not supported in Internet Explorer 8 and earlier versions.

Technical Details

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