HTML <option> class Attribute

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

Example

#

Four <option> element styled with a class attribute.

<style>
  .option { background: #dfe7ff; color: #4e46e5;}
</style>

<select>
  <option>-- Select country --</option>
  <option class="option">United States</option>
  <option class="option">United Kingdom</option>
  <option class="option">Thailand</option>
  <option class="option">India</option>
</select>

Using class

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

Multiple classnames are separated by a space.

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

<option class="classnames">

Values

#

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

More Examples

Four <option> element styled with a class attribute.
Clicking the button toggles a classname that changes the option text to bold.


<style>
  .option-indigo { background: #dfe7ff; color: #4e46e5;}
  .bold { font-weight: bold; }
</style>

<select>
  <option>-- Select country --</option>
  <option class="option-indigo">United States</option>
  <option class="option-indigo">United Kingdom</option>
  <option class="option-indigo">Thailand</option>
  <option class="option-indigo">India</option>
</select>

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

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

Code explanation

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

Clicking the button locates all the <option> elements one classname.

Javascript then iterates over the elements and toggle the second classname changing the text boldness.


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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