The class attribute assigns one or more classnames to the <body> tag.
Classnames are defined in a stylesheet or in a local <style> element.
Classes, i.e. classnames, are used to style the body element.
A class attribute styling a <body> element.
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>
Classes (i.e. classnames) are used for styling the body element.
Multiple classnames are separated by a space.
JavaScript uses classes to access elements by classname.
Tip: class is a global attribute that can be applied to any HTML element.
<body class="classnames" >
| Value | Description |
|---|---|
| classnames | One or more space-separated class names. |
A class attribute styling a <body> element.
Clicking the button toggles a classname that changes the background color.
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>
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.
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 |
Back to <body>
