HTML <dd> class Attribute

The class attribute on a <dd> tag assigns one or more classnames to the description details element. Classes are used to style elements. Classnames are defined in a stylesheet or in a local <style> element.

Example

#

A class attribute styling a <dd> element.

Kunstmuseum
Basel, Switzerland
National Gallery of Art
Washington DC, USA
Musée d'Orsay
Paris, France
<style>
  .dd-italic {font-style: italic;}
</style>

<dl>
  <dt>Kunstmuseum</dt>
  <dd class="dd-italic">Basel, Switzerland</dd> 
  <dt>National Gallery of Art</dt>
  <dd class="dd-italic">Washington DC, USA</dd>
  <dt>Musée d'Orsay</dt>
  <dd class="dd-italic">Paris, France</dd>
</dl>

Using class

The class attribute assigns one or more classnames to the <col> tag.

Multiple classnames are separated by a space.

Classes (i.e. classnames) are used for styling the col element.

JavaScript uses classes to access one or more elements by classname.

Tip:  class is a global attribute that can be applied to any HTML element.


Syntax

<dd class="classnames" >

Values

#

Value Description
classnames One or more space-separated class names.

More Examples

A class attribute styling a <dd> element.
Clicking the button toggles the background color for all <dd> items.

1. Kunstmuseum
Basel, Switzerland
2. National Gallery of Art
Washington DC, USA
3. Musée d'Orsay
Paris, France

<style>
  .dd-italic { font-style:italic; }
  .dd-moccasin { background-color:moccasin; }
</style>

<dl>
  <dt>1. Kunstmuseum</dt>
  <dd class="dd-italic">Basel, Switzerland</dd> 
  <dt>2. National Gallery of Art</dt>
  <dd class="dd-italic">Washington DC, USA</dd>
  <dt>3. Musée d'Orsay</dt>
  <dd class="dd-italic">Paris, France</dd>
</dl>

<br/>
<button onclick="toggle();">Toggle class</button>

<script>
  let toggle = () => {
    let elements = document.getElementsByClassName("dd-italic");
    [].forEach.call(elements, element => element.classList.toggle("dd-moccasin"));
  }
</script>

Code explanation

Two CSS classes are defined in the <style> element.

All <dd> elements are assigned with one classname.

Clicking the button retrieves all <dd> elements using that classname.

JavaScript then iterates over the elements and toggles another classname changing the background color.


Browser support

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

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