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HTML class Attribute

HTML Standard Attributes Reference HTML Standard Attributes

Example

Use of the class attribute in an HTML document:

<html>
<head>
<style type="text/css">
h1.intro {color:blue;}
p.important {color:red;}
</style>
</head>

<body>
<h1 class="intro">Header 1</h1>
<p>A paragraph.</p>
<p class="important">Note that this is an important paragraph.</p>
</body>
</html>

Try it yourself »
(more examples at the bottom of this page)

Browser Support

Internet Explorer Firefox Opera Google Chrome Safari

The class attribute is supported in all major browsers.

Definition and Usage

The class attribute specifies one or more classnames for an element.

The class attribute is mostly used to point to a class in a style sheet. However, it can also be used by a JavaScript (via the HTML DOM) to make changes to HTML elements with a specified class.

Tips and Notes

Note: The class attribute is not valid in: <base>, <head>, <html>, <meta>, <param>, <script>, <style>, and <title>.

Syntax

<element class="classname">

Attribute Values

Value Description
classname Specifies one or more class names for an element. To specify multiple classes, separate the class names with a space, e.g. <span class="left important">. This allows you to combine several CSS classes for one HTML element.

Naming rules:

  • Must begin with a letter A-Z or a-z
  • Can be followed by: letters (A-Za-z), digits (0-9), hyphens ("-"), and underscores ("_")
  • In HTML, all values are case-insensitive

Examples

Try it Yourself - Examples

Add multiple classes to one element
How to add multiple classes to one HTML element.

HTML Standard Attributes Reference HTML Standard Attributes
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