HTML <mark> class Attribute

The class attribute on a <mark> tag assigns one or more classnames to the marked text 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 <mark> element.

Paul Cézanne was a post-impressionist painter.

<style>
  .marked-text {background: moccasin;font-style: italic;}
</style>

<p>
  Paul Cézanne was a 
  <mark class="marked-text">post-impressionist</mark>
  painter.
</p>

Using class

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

Multiple classnames are separated by a space.

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

<mark class="classnames">

Values

#

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

More Examples

A class attribute styling a <mark> element.
Clicking the button toggles a classname that changes the background color.

Paul Cézanne was a post-impressionist painter.


<style>
  .mark-moccasin { background-color: moccasin; }
  .mark-lavender { background-color: lavender; }
</style>

<p>
 Paul Cézanne was a 
 <mark id="mymark" class="mark-moccasin">post-impressionist</mark>
 painter.
</p>

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

<script>
  let toggle = () => {
    let element = document.getElementById("mymark");
    element.classList.toggle("mark-lavender");
  }
</script>

Code explanation

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

The class attribute in <mark> assigns one classname.

Repeatedly clicking the button toggles another class, changing the background color of the <mark>.


Browser support

Here is when class support started for each browser:

Chrome
6.0 Sep 2010
Firefox
4.0 Mar 2011
IE/Edge
9.0 Mar 2011
Opera
11.1 Mar 2011
Safari
5.0 Jun 2010

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