Home Web Front-end CSS Tutorial How to call class in css

How to call class in css

Nov 25, 2021 pm 05:29 PM
class css

In CSS, you can use the ".class" selector to call class. This selector is used to select elements with specified class attributes. The syntax is ".class attribute value {css style code;}".

How to call class in css

The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.

How to call class in css

#When we usually create web pages, we often use class to select and call CSS style attributes. Newbies who are learning CSS are not very familiar with the use of classes. Let’s briefly introduce it below.

Class is called "class" in the program, and it is also called "class" in written language in CSS. In the CSS style, use lowercase "dot" and "." to name it such as: .top{attribute: attribute value;}.

That is, the "." class selector selects elements with the specified class (class).

In the html page, use class="top" to select the call, such as: .top{attribute: attribute value;}, in the html page, call it as

Here is The text

example is as follows:

<!DOCTYPE html>
<html>
<head>
<style>
.intro
{
background-color:yellow;
}
</style>
</head>
<body>
<h1>欢迎来到我到的主页</h1>
<div class="intro">
<p>我是唐老鸭。</p>
<p>我住在 Duckburg。</p>
</div>
<p>我最好的朋友是米老鼠。</p>
</body>
</html>

Output result:

How to call class in css

It can be seen that through ".class" selection The processor can call the specified class to execute the specified css style.

Note:

These are the simplest css, I hope it will be helpful to beginners.

(Learning video sharing: css video tutorial)

The above is the detailed content of How to call class in css. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undress AI Tool

Undress AI Tool

Undress images for free

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How to use PHP to build social sharing functions PHP sharing interface integration practice How to use PHP to build social sharing functions PHP sharing interface integration practice Jul 25, 2025 pm 08:51 PM

The core method of building social sharing functions in PHP is to dynamically generate sharing links that meet the requirements of each platform. 1. First get the current page or specified URL and article information; 2. Use urlencode to encode the parameters; 3. Splice and generate sharing links according to the protocols of each platform; 4. Display links on the front end for users to click and share; 5. Dynamically generate OG tags on the page to optimize sharing content display; 6. Be sure to escape user input to prevent XSS attacks. This method does not require complex authentication, has low maintenance costs, and is suitable for most content sharing needs.

PHP creates a blog comment system to monetize PHP comment review and anti-brush strategy PHP creates a blog comment system to monetize PHP comment review and anti-brush strategy Jul 25, 2025 pm 08:27 PM

1. Maximizing the commercial value of the comment system requires combining native advertising precise delivery, user paid value-added services (such as uploading pictures, top-up comments), influence incentive mechanism based on comment quality, and compliance anonymous data insight monetization; 2. The audit strategy should adopt a combination of pre-audit dynamic keyword filtering and user reporting mechanisms, supplemented by comment quality rating to achieve content hierarchical exposure; 3. Anti-brushing requires the construction of multi-layer defense: reCAPTCHAv3 sensorless verification, Honeypot honeypot field recognition robot, IP and timestamp frequency limit prevents watering, and content pattern recognition marks suspicious comments, and continuously iterate to deal with attacks.

How to build a PHP Nginx environment with MacOS to configure the combination of Nginx and PHP services How to build a PHP Nginx environment with MacOS to configure the combination of Nginx and PHP services Jul 25, 2025 pm 08:24 PM

The core role of Homebrew in the construction of Mac environment is to simplify software installation and management. 1. Homebrew automatically handles dependencies and encapsulates complex compilation and installation processes into simple commands; 2. Provides a unified software package ecosystem to ensure the standardization of software installation location and configuration; 3. Integrates service management functions, and can easily start and stop services through brewservices; 4. Convenient software upgrade and maintenance, and improves system security and functionality.

What are common CSS browser inconsistencies? What are common CSS browser inconsistencies? Jul 26, 2025 am 07:04 AM

Different browsers have differences in CSS parsing, resulting in inconsistent display effects, mainly including the default style difference, box model calculation method, Flexbox and Grid layout support level, and inconsistent behavior of certain CSS attributes. 1. The default style processing is inconsistent. The solution is to use CSSReset or Normalize.css to unify the initial style; 2. The box model calculation method of the old version of IE is different. It is recommended to use box-sizing:border-box in a unified manner; 3. Flexbox and Grid perform differently in edge cases or in old versions. More tests and use Autoprefixer; 4. Some CSS attribute behaviors are inconsistent. CanIuse must be consulted and downgraded.

What is the accent-color property? What is the accent-color property? Jul 26, 2025 am 09:25 AM

accent-color is an attribute used in CSS to customize the highlight colors of form elements such as checkboxes, radio buttons and sliders; 1. It directly changes the default color of the selected state of the form control, such as changing the blue check mark of the checkbox to red; 2. Supported elements include input boxes of type="checkbox", type="radio" and type="range"; 3. Using accent-color can avoid complex custom styles and extra DOM structures, and maintain native accessibility; 4. It is generally supported by modern browsers, and old browsers need to be downgraded; 5. Set accent-col

CSS transitions tutorial CSS transitions tutorial Jul 26, 2025 am 09:30 AM

CSStransitionsenablesmoothpropertychangeswithminimalcode,idealforhovereffectsandinteractivefeedback.1.Usethesyntaxtransition:propertydurationtiming-functiondelay;todefinetransitions,liketransition:background-color0.3sease0.1s;.2.Specifytransition-pro

Describe the `vertical-align` property and its typical use cases Describe the `vertical-align` property and its typical use cases Jul 26, 2025 am 07:35 AM

Thevertical-alignpropertyinCSSalignsinlineortable-cellelementsvertically.1.Itadjustselementslikeimagesorforminputswithintextlinesusingvalueslikebaseline,middle,super,andsub.2.Intablecells,itcontrolscontentalignmentwithtop,middle,orbottomvalues,oftenu

How to change text color in CSS? How to change text color in CSS? Jul 27, 2025 am 04:25 AM

To change the text color in CSS, you need to use the color attribute; 1. Use the color attribute to set the text foreground color, supporting color names (such as red), hexadecimal codes (such as #ff0000), RGB values (such as rgb(255,0,0)), HSL values (such as hsl(0,100%,50%)), and RGBA or HSLA with transparency (such as rgba(255,0,0,0.5)); 2. You can apply colors to any element containing text, such as h1 to h6 titles, paragraph p, link a (note the color settings of different states of a:link, a:visited, a:hover, a:active), buttons, div, span, etc.; 3. Most

See all articles