The class attribute assigns one or more classnames to the <abbr> tag.
Classnames are defined in a stylesheet or in a local <style> element.
These classnames are used to style the <abbr> element.
A class attribute styling an <abbr> element.
We use HTML to compose our web pages.
<style>
.indigo { background-color: #edf2ff; }
</style>
<p>
We use
<abbr class="indigo" title="Hypertext Markup Language">HTML</abbr>
to compose our web pages.
</p>
Classes (i.e. classnames) are used for styling the abbr element.
Multiple classnames are separated by a space.
JavaScript uses classes to access elements by classname.
Tip: class is a global attribute that can be applied to any HTML element.
<abbr class="classnames">
| Value | Description |
|---|---|
| classnames | One or more space-separated classnames. |
A class attribute styling an <abbr> element.
Clicking the button toggles a classname that removes the underline.
We use HTML to compose our web pages.
<style>
.indigo { background-color: #edf2ff; }
.lucida { font-family: "Lucida Console", Monaco, monospace}
.no-underline { text-decoration: none; }
</style>
<p>
We use
<abbr class="indigo lucida" id="myabbr"
title="Hypertext Markup Language">HTML</abbr>
to compose our web pages.
</p>
<br />
<button onclick="toggle();">Toggle class</button>
<script>
let toggle = () => {
let element = document.getElementById("myabbr");
element.classList.toggle("no-underline");
}
</script>
Three CSS classes are defined in the <style> element.
The class attribute in <abbr> assigns two of those classes.
Repeatedly clicking the button toggles the third class removing the underline.
Here is when class support started for each browser:
 Chrome
|
1.0 | Sep 2008 |
 Firefox
|
1.0 | Sep 2002 |
 IE/Edge
|
1.0 | Aug 1995 |
 Opera
|
1.0 | Jan 2006 |
 Safari
|
1.0 | Jan 2003 |
