html tutorial - onunload Attribute in HTML - html5 - html code - html form

  • The onunload attribute is used to execute a script when a page has unloaded.
  • The onunload happens when the user navigates away from the page (by clicking on a link, submitting a form, closing the browser window, etc.)
  • The onunload attribute is a section of the Event Attributes.

Syntax for onunload attribute in HTML:

<body onunload="script">

Applies to:

Elements Attribute
<body> onunload

Attribute values:

Value Description
Script The script can run on onunload.

Sample coding for onunload attribute in HTML:

<!DOCTYPE html>
    <body onload="Wikitechy()">
            function Wikitechy() {
                alert("Wikitechy Page is loaded");

Code Explanation for onunload attribute:

onunload Attribute Code Explanation

  1. <body> tag encloses all the contents of an HTML document.
  2. The onunload attribute executes when an associated element has unloaded.

Browser Support for onunload attribute in HTML:

Yes Yes Yes Yes Yes

Tips and Notes:

  • If we reload a page, we will also trigger the onunload event and the onload event.

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