HTML Reference
Tags:
Categories: , ,

Quick Reference

The onunload event fires when the user navigates away from the page by clicking a link, submitting a form, closing the browser window, etc.

Supported HTML tags:

<!-- HTML -->
<body onunload="my_function()">
// JavaScript
function my_function() {
    alert('Thanks for visiting.');
}

Note

!!! Not all browsers support this HTML event.

Using Only JavaScript

Any of the following are valid.

onunload

document.getElementsByTagName('body')[0].onunload = function() {my_function()};

function my_function() {
    alert('Thanks for visiting.');
}

unload

// method 1
window.addEventListener('unload', function() {
    alert('Thanks for visiting.');
});
// method 2
window.addEventListenerr('unload', my_function);

function my_function() {
    alert('Thanks for visiting.');
}

Event

Bubblesno
Can be cancelledno

HTML Notes:

  • In our HTML section the term “tag” and “element” are often used interchangeably to refer to both the tag used to create a page element and the element created by the tag (<p> tag = <p> element = paragraph on the page)
  • HTML5 is not case sensitive; so <P> is the same as <p>, <H1> is the same as <h1>
  • Global attributes can be used with all HTML tags and are therefore not mentioned on every tag page
  • To write clean, readable HTML code, it is best to use indentation whereas elements within elements are indented (tabbed or spaces) to create something that looks like a project outline
  • The browser will automatically remove any extra spaces and lines in your HTML code when the page is displayed
  • Double quotes or single quotes can be used around HTML attribute values, but when the attribute value itself contains one form of quote, it will be necessary to use the other around the attribute
If you like our content, and find it helpful, please consider making a small donation. Thank you!

We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.