Table of Contents
Chocolate curry
Home Web Front-end CSS Tutorial After reading this, everyone will understand the difference between class and ID selectors in CSS styles. Summary_Experience exchange

After reading this, everyone will understand the difference between class and ID selectors in CSS styles. Summary_Experience exchange

May 16, 2016 pm 12:06 PM
class css the difference style Selector

You can define your own selectors using the class selector and the identifier selector id.

The advantage of this is that you can represent the same HTML element differently depending on the class or id.

In CSS, the class selector is preceded by a half-width English period (.), and the id is preceded by a half-width English pound sign (#).

Looks like this:

#top { background-color: #ccc; padding: 1em } .intro { color: red; font-weight: bold; }
HTML with CSS connections use the attributes id and class. Like this:

Chocolate curry

This is my recipe for making curry purely with chocolate

Mmm mm mmmmm



The difference between id and class is that id is used on a unique element, while class is used on more than one element.

You can also apply selectors to a specific HTML element by placing the HTML selector in front, so p.jam { whatever } will be applied to paragraphs with class "jam".


An id name is usually uniquely defined in a page, so it is usually recommended to use class when defining css on a page, so that you can reuse your css. Leave the id for the most needed use JavaScript for html elements, etc.
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

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.

Undress AI Tool

Undress AI Tool

Undress images for free

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)

Hot Topics

Java Tutorial
1664
14
PHP Tutorial
1268
29
C# Tutorial
1242
24
HTML: The Structure, CSS: The Style, JavaScript: The Behavior HTML: The Structure, CSS: The Style, JavaScript: The Behavior Apr 18, 2025 am 12:09 AM

The roles of HTML, CSS and JavaScript in web development are: 1. HTML defines the web page structure, 2. CSS controls the web page style, and 3. JavaScript adds dynamic behavior. Together, they build the framework, aesthetics and interactivity of modern websites.

Difference between centos and ubuntu Difference between centos and ubuntu Apr 14, 2025 pm 09:09 PM

The key differences between CentOS and Ubuntu are: origin (CentOS originates from Red Hat, for enterprises; Ubuntu originates from Debian, for individuals), package management (CentOS uses yum, focusing on stability; Ubuntu uses apt, for high update frequency), support cycle (CentOS provides 10 years of support, Ubuntu provides 5 years of LTS support), community support (CentOS focuses on stability, Ubuntu provides a wide range of tutorials and documents), uses (CentOS is biased towards servers, Ubuntu is suitable for servers and desktops), other differences include installation simplicity (CentOS is thin)

Solve caching issues in Craft CMS: Using wiejeben/craft-laravel-mix plug-in Solve caching issues in Craft CMS: Using wiejeben/craft-laravel-mix plug-in Apr 18, 2025 am 09:24 AM

When developing websites using CraftCMS, you often encounter resource file caching problems, especially when you frequently update CSS and JavaScript files, old versions of files may still be cached by the browser, causing users to not see the latest changes in time. This problem not only affects the user experience, but also increases the difficulty of development and debugging. Recently, I encountered similar troubles in my project, and after some exploration, I found the plugin wiejeben/craft-laravel-mix, which perfectly solved my caching problem.

How to optimize website performance: Experiences and lessons learned from using the Minify library How to optimize website performance: Experiences and lessons learned from using the Minify library Apr 17, 2025 pm 11:18 PM

In the process of developing a website, improving page loading has always been one of my top priorities. Once, I tried using the Miniify library to compress and merge CSS and JavaScript files in order to improve the performance of the website. However, I encountered many problems and challenges during use, which eventually made me realize that Miniify may no longer be the best choice. Below I will share my experience and how to install and use Minify through Composer.

The difference between laravel and thinkphp The difference between laravel and thinkphp Apr 18, 2025 pm 01:09 PM

Laravel and ThinkPHP are both popular PHP frameworks and have their own advantages and disadvantages in development. This article will compare the two in depth, highlighting their architecture, features, and performance differences to help developers make informed choices based on their specific project needs.

How to view firewall status in centos How to view firewall status in centos Apr 14, 2025 pm 08:18 PM

The state of the CentOS firewall can be viewed through the sudo firewall-cmd --state command, returning to running or not running. For more detailed information, you can use sudo firewall-cmd --list-all to view, including configured areas, services, ports, etc. If firewall-cmd does not solve the problem, you can use sudo iptables -L -n to view iptables rules. Be sure to make a backup before modifying the firewall configuration to ensure server security.

How to generate html by sublime How to generate html by sublime Apr 16, 2025 am 09:03 AM

There are two ways to generate HTML code in Sublime Text: Using the Emmet plugin, you can generate HTML elements by entering an abbreviation and pressing the Tab key, or use a predefined HTML file template that provides basic HTML structure and other features such as code snippets, autocomplete functionality, and Emmet Snippets.

HTML vs. CSS and JavaScript: Comparing Web Technologies HTML vs. CSS and JavaScript: Comparing Web Technologies Apr 23, 2025 am 12:05 AM

HTML, CSS and JavaScript are the core technologies for building modern web pages: 1. HTML defines the web page structure, 2. CSS is responsible for the appearance of the web page, 3. JavaScript provides web page dynamics and interactivity, and they work together to create a website with a good user experience.

See all articles