The class attribute assigns one or more classnames to the <dl> tag.
Classnames are defined in a stylesheet or in a local <style> element.
Classes, i.e. classnames, are used to style elements.
A class attribute styling a <dl> element.
<style>
.dl-blue {background:aliceblue;border:solid 4px lightblue;padding:30px;width:300px;}
</style>
<dl class="dl-blue">
<dt>Kunstmuseum</dt>
<dd>Basel, Switzerland</dd>
<dt>National Gallery of Art</dt>
<dd>Washington DC, USA</dd>
<dt>Musée d'Orsay</dt>
<dd>Paris, France</dd>
</dl>
Classes (i.e. classnames) are used for styling the dl 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.
<dl class="classnames">
| Value | Description |
|---|---|
| classnames | One or more space-separated class names. |
A class attribute styling a <dl> element.
Clicking the button toggles a classname that changes the border color and border radius.
<style>
.dl-border {background:aliceblue;border:solid 4px lightblue;padding:30px;width:300px;}
.dl-rounded {border-radius:25px;border-color:steelblue;}
</style>
<dl id="mydl" class="dl-border">
<dt>Kunstmuseum</dt>
<dd>Basel, Switzerland</dd>
<dt>National Gallery of Art</dt>
<dd>Washington DC, USA</dd>
<dt>Musée d'Orsay</dt>
<dd>Paris, France</dd>
</dl>
<br/>
<button onclick="toggle();">Toggle class</button>
<script>
let toggle = () => {
let element = document.getElementById("mydl");
element.classList.toggle("dl-rounded");
}
</script>
Two CSS classes are defined in the <style> element.
The class attribute on the <dl> assigns one classname.
Repeatedly clicking the button toggles another class, changing the border radius of the data list.
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 |
Back to <dl>
