CSS 代码由以下类型组成:选择器:指定应用 CSS 规则的 HTML 元素。属性:定义元素的视觉样式。值:指定属性的具体设置。声明块:包含属性和值,定义元素的样式。注释:用于添加注释,不影响视觉呈现。单位:指定属性值的度量。媒体查询:根据条件应用特定的 CSS 规则,实现响应式设计。
CSS 代码类型
CSS(层叠样式表)是一种用于定义和控制网页视觉呈现的语言。它由不同类型的代码组成,每种代码都有特定的功能:
1. 选择器
选择器用于指定哪些 HTML 元素将应用 CSS 规则。它们可以根据元素名称、ID、类、属性等来选择元素。
2. 属性
属性定义 CSS 规则将应用于元素的具体视觉样式。常见的属性包括颜色、字体大小、边框宽度、背景颜色等。
3. 值
值指定属性的具体设置。例如,color 属性的值可以是十六进制颜色代码、RGB 值或颜色名称。
4. 声明块
声明块包含一组属性和值,它们一起用于定义元素的样式。声明块由大括号包围,例如:
{ color: blue; font-size: 16px; }
5. 注释
注释用于在 CSS 代码中添加注释。注释不会影响页面的视觉呈现,但它们可以使代码更容易阅读和理解。注释以 / 和 / 标记,例如:
/* 这是 CSS 注释 */
6. 单位
单位用于指定属性值的度量。常见的单位包括像素 (px)、百分比 (%)、em、rem。
7. 媒体查询
媒体查询允许根据不同的条件(例如屏幕尺寸、设备类型)应用特定的 CSS 规则。这使开发人员可以创建针对不同设备和浏览器的响应式设计。
The above is the detailed content of What are the css codes?. For more information, please follow other related articles on the PHP Chinese website!

In a perfect world, our projects would have unlimited resources and time. Our teams would begin coding with well thought out and highly refined UX designs.

Oh, the Many Ways to Make Triangular Breadcrumb Ribbons

SVG has its own set of elements, attributes and properties to the extent that inline SVG code can get long and complex. By leveraging CSS and some of the forthcoming features of the SVG 2 specification, we can reduce that code for cleaner markup.

You might not know this, but JavaScript has stealthily accumulated quite a number of observers in recent times, and Intersection Observer is a part of that

We may not need to throw out all CSS animations. Remember, it’s prefers-reduced-motion, not prefers-no-motion.

PWA (Progressive Web Apps) have been with us for some time now. Yet, each time I try explaining it to clients, the same question pops up: "Will my users be

It's extremely surprising to me that HTML has never had any way to include other HTML files within it. Nor does there seem to be anything on the horizon that

There are a lot of different ways to use SVG. Depending on which way, the tactic for recoloring that SVG in different states or conditions — :hover,


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

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

Hot Article

Hot Tools

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment