The HTML class attribute is used to specify a class for an HTML element.
Multiple HTML elements can share the same class.
The class attribute is often used to point to a class name in a style sheet. It can also be used by JavaScript to access and manipulate elements with the specific class name.
In the following example we have three <div> elements with a class attribute with the value of "city". All of the three <div> elements will be styled equally according to the .city style definition in the head section
<!DOCTYPE html>
<html>
<head>
<style>
.city {
background-color: tomato;
color: white;
border: 2px solid black;
margin: 20px;
padding: 20px;
}
</style>
</head>
<body>
<div class="city">
<h2> London </h2>
<p> London is the capital of England. <p>
</div>
<div class="city">
<h2> Paris </h2>
<p> Paris is the capital of France. <p>
</div>
<div class="city">
<h2> Tokyo </h2>
<p> Tokyo is the capital of Japan. <p>
</div>
</body>
</html>
In the following example we have two <span> elements with a class attribute with the value of "note". Both <span> elements will be styled equally according to the .note style definition in the head section:
<!DOCTYPE html>
<html>
<head>
<style>
.note {
font-size: 120%;
color: red;
}
</style>
</head>
<body>
<h1> My <span class="note"> Important </span> Heading </h1>
<p> This is some <span class="note"> Important </span> text. </p>
</body>
</html>
Tip: The class attribute can be used on any HTML element.
NOTE :The class name is case sensitive!
Tip: You can learn much more about CSS in our CSS Tutorial.
To create a class; write a period (.) character, followed by a class name. Then, define the CSS properties within curly braces {}:
<!DOCTYPE html>
<html>
<head>
<style>
.city {
background-color: tomato;
color: white;
padding:10px;
}
</style>
</head>
<body>
<h2> London </h2>
<p> London is the capital of England. <p>
<h2> Paris </h2>
<p> Paris is the capital of France. <p>
<h2> Tokyo </h2>
<p> Tokyo is the capital of Japan. <p>
</body>
</html>
HTML elements can belong to more than one class.
To define multiple classes, separate the class names with a space, e.g. <div class="city main"<. The element will be styled according to all the classes specified.
In the following example, the first <h2> element belongs to both the city class and also to the main class, and will get the CSS styles from both of the classes:
<h1 class="city main" > London <h2>
<h1 class="city" > Paris <h2>
<h1 class="city" > Tokyo <h2>
Different HTML elements can point to the same class name.
In the following example, both <h2> and <p> point to the "city" class and will share the same style:
<h1 class="city main" > Paris <h2>
<p class="city" > Paris is the capital of France <p>
The HTML class attribute specifies one or more class names for an element
Classes are used by CSS to select and access specific elements
The class attribute can be used on any HTML element
The class name is case sensitive
Different HTML elements can point to the same class name