HTML <ol> class Attribute

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

Example

#

A class attribute styling an <ol> element.

  1. Amsterdam
  2. London
  3. Berlin
  4. Paris
<style>
  .ol {
    background: papayawhip;
    padding: 20px 40px;
    width: 220px;
    border: 3px solid brown;
  }
</style>

<ol class="ol">
  <li>Amsterdam</li>
  <li>London</li>
  <li>Berlin</li>
  <li>Paris</li>
</ol>

Using class

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

Multiple classnames are separated by a space.

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

<ol class="classnames">

Values

#

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

More Examples

A class attribute styling an <ol> element.
Clicking the button toggles a classname that adds a box shadow to the element.

  1. Amsterdam
  2. London
  3. Berlin
  4. Paris

<style>
 .ol {
    background: papayawhip;
    padding: 20px 40px;
    width: 220px;
    border: 3px solid brown;
  }
  .ol-shadowed {
    border: 0;
    -webkit-box-shadow: 0px 0px 10px 2px rgba(0,0,0,0.2);
    -moz-box-shadow: 0px 0px 10px 2px rgba(0,0,0,0.2);
    box-shadow: 0px 0px 10px 2px rgba(0,0,0,0.2);
  }
</style>

<ol id="myol" class="ol">
  <li>Amsterdam</li>
  <li>London</li>
  <li>Berlin</li>
  <li>Paris</li>
</ol>

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

<script>
  let toggle = () => {
    let element = document.getElementById("myol");
    element.classList.toggle("ol-shadowed");
  }
</script>

Code explanation

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

The class attribute in <ol> assigns one classname.

Repeatedly clicking the button toggles another class, adding or removing a box shadow to the <ol> element.


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

You may also like

 Back to <ol>
Guides