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CSS class selector


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CSS Tutorial » CSS class selector

What is a CSS class?

A CSS .class is an attribute used to define a group of HTML elements to apply a unique style and formatting to those CSS elements.

The .class CSS selector selects elements with a specific class attribute.

To select items with a specific class, type a period (.), Followed by the class name.

Internal CSS and HTML Syntax:

<style>
.class_name {
property: value;
}
</style>
Note: use external CSS instead.

In this chapter we learn:
What is a CSS class?
Why do we use class in CSS?
What is CSS class and ID?

Browser Support CSS class selector

Element chrome browser
 Chrome
ie browser
 IE
firefox browser
 Firefox
opera browser
 Opera
safari browser
 Safari
Browser Support option Yes Yes Yes Yes Yes

 

CSS class selector

Use a class when you want to constantly style multiple items across the webpage. Classes are useful when you have more than one item that shares the same style.

Example (this is HTML - PHP editor, change text, values on this window)

<!DOCTYPE html>
<html>
<head>
<style>
p.paragraph {
text-align: right;
color: green;
}

p.large_paragraph {
font-size: 250%;
}
</style>
</head>
<body>

<h1>Example of the .class selector</h1>

<h1 class="paragraph">This h1 title not affected</h1>
<p class="paragraph">This paragraph will be green and right aligned.</p>
<p class="paragraph large_paragraph">This paragraph will be green,<br />
right aligned, <br />
and with large font-size 250%.</p>

</body>
</html>

Related subjects:
difference between class and id CSS table border

Tags: css class selector, vs id, inside class, starts with, inheritance, and id, hover, name convention, contains, inherit from another class

 

How can I use one class inside another class in CSS?

To nestle classes or any other selector in CSS, very simple just separate the selector with spaces as: .parent .child { /* CSS Properties */ }

Example (this is HTML - PHP editor, change text on this window)

<!DOCTYPE html>
<html>
<head>
<style>
.green-text {
color: green;
font-weight: bold;
}

.green-text span {
color: red;
}
</style>
</head>
<body>

<h1 class="green-text">
This is my nice title <span>for the next paragraph</span> header.
</h1>

</body>
</html>

TAGS: What is a CSS class?, Why do we use class in CSS?, What is CSS class and ID?

 

How to Use a CSS Class

The examples below will help you understand in a fairly simple way how to use css class inside class.

Example (this is HTML - PHP editor, change text on this window)

<!DOCTYPE html>
<html>
<head>
<style>
.red-text {
color: #F00;
}
.font-28{
font-size: 28px;
}
</style>
</head>
<body>

<p class="red-text font-28">This is an example of a sentence with font-size: 28px</p>
<p class="red-text">This is an example of a sentence with normal font size</p>

</body>
</html>

 



css class selector, vs id, inside class, starts with, inheritance, and id, hover, name convention, contains, inherit from another class
CSS class selector - css tutorial

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