HTML <body> class Attribute

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

Example

#

A class attribute styling a <body> element.

The Night Watch

Militia Company of District II under the Command of Captain Frans Banninck Cocq, also known as The Shooting Company of Frans Banning Cocq and Willem van Ruytenburch, but commonly referred to as The Night Watch (Dutch: De Nachtwacht), is a 1642 painting by Rembrandt van Rijn. It is in the collection of the Amsterdam Museum but is prominently displayed in the Rijksmuseum as the best-known painting in its collection. The Night Watch is one of the most famous Dutch Golden Age paintings.

The painting is famous for three things: its colossal size, the dramatic use of light and shadow (tenebrism), and the perception of motion in what would have traditionally been a static military group portrait. The painting was completed in 1642, at the peak of the Dutch Golden Age.


<style>
  .body-style {background-color:oldlace; padding:25px;}
</style>

<body class="body-style">
  <h2>The Night Watch</h2>
  <p>
    Militia Company of District II under the Command of 
    Captain Frans Banninck Cocq, also known as The Shooting 
    Company of Frans Banning Cocq and Willem van Ruytenburch, 
    but commonly referred to as The Night Watch (Dutch: 
    De Nachtwacht), is a 1642 painting by Rembrandt van Rijn. 
    It is in the collection of the Amsterdam Museum but is 
    prominently displayed in the Rijksmuseum as the 
    best-known painting in its collection. The Night Watch 
    is one of the most famous Dutch Golden Age paintings.
  </p>
  <p>
    The painting is famous for three things: its colossal 
    size, the dramatic use of light and shadow (tenebrism),
    and the perception of motion in what would have 
    traditionally been a static military group portrait. 
    The painting was completed in 1642, at the peak of the 
    Dutch Golden Age.
  </p>
  <br />
  <img src="/img/html/nightwatch.jpg">
</body>

Using class

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

Multiple classnames are separated by a space.

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

<body class="classnames" >

Values

#

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

More Examples

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

The Night Watch

Militia Company of District II under the Command of Captain Frans Banninck Cocq, also known as The Shooting Company of Frans Banning Cocq and Willem van Ruytenburch, but commonly referred to as The Night Watch (Dutch: De Nachtwacht), is a 1642 painting by Rembrandt van Rijn. It is in the collection of the Amsterdam Museum but is prominently displayed in the Rijksmuseum as the best-known painting in its collection. The Night Watch is one of the most famous Dutch Golden Age paintings.

The painting is famous for three things: its colossal size, the dramatic use of light and shadow (tenebrism), and the perception of motion in what would have traditionally been a static military group portrait. The painting was completed in 1642, at the peak of the Dutch Golden Age.




<style>
  .pagestyle {padding:25px;}
  .oldlace {background:oldlace;}
  .almond {background:blanchedalmond;}
</style>

<body id="mybody" class="pagestyle oldlace">
  <h2>The Night Watch</h2>
  <p>
    Militia Company of District II under the Command of 
    Captain Frans Banninck Cocq, also known as The Shooting 
    Company of Frans Banning Cocq and Willem van Ruytenburch, 
    but commonly referred to as The Night Watch (Dutch: 
    De Nachtwacht), is a 1642 painting by Rembrandt van Rijn. 
    It is in the collection of the Amsterdam Museum but is 
    prominently displayed in the Rijksmuseum as the 
    best-known painting in its collection. The Night Watch 
    is one of the most famous Dutch Golden Age paintings.
  </p>
  <p>
    The painting is famous for three things: its colossal 
    size, the dramatic use of light and shadow (tenebrism),
    and the perception of motion in what would have 
    traditionally been a static military group portrait. 
    The painting was completed in 1642, at the peak of the 
    Dutch Golden Age.
  </p>
  <br />
  <img src="/img/html/nightwatch.jpg">

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

<script>
  let toggle = () => {
    let element = document.getElementById("mybody");
    element.classList.toggle("almond");
  }
</script>

Code explanation

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

The class attribute in <body> assigns two classnames.

Repeatedly clicking the button toggles a third classname, changing the page's 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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