CSS study notes 2_html/css_WEB-ITnose
When we browse the website, we will click some links. These links have different effects before and after clicking. These effects are done using pseudo-element selectors
Pseudo element selector:
It is to pre-define some selectors in HTML and become pseudo-elements
format: tag name: pseudo-element: class name tag name.class name: Pseudo element
Hyperlink status:
a :link : Hyperlink unclicked status
a :visited Status after being visited
a :hover Status when the cursor moves to the hyperlink (not clicked) ->Mouseover Stop
a :active Status when clicking a hyperlink
Usage sequence: L - V - H - A, before and after clicking It is a status
It is best to use IE browser to test, some browsers may not see the effect
<style type="text/css"> /*未访问*/ a:link{ background-color: #06F; color: #FFF; text-decoration: none; font-size: 15px; } /*鼠标悬停*/ a:hover{ background-color: #FFF; color: #F00; font-size: 20px; } /*点击效果*/ a:active{ background-color: #000; color: #FFF; font-size: 25px; } /*点击后效果*/ a:visited{ background-color: #FF9; color: #000; text-decoration: line-through; } </style>
The paragraph tag also has the above effect
p:first-line: the first line of text in the paragraph
p:first-letter: the first letter in the paragraph
:focus: element with focus (ps: not supported by IE6, FIrefox, You can see the effect on google)
<style type="text/css"> div:hover{ /*类似于悬停效果 一样可以加在div上*/ background-color: #F00; color: #FFF; } input :focus{ background-color: #F0F; } </style></head><body><hr/><a href="http://www.sina.com.cn" target="_blank">伪元素选择器演示</a><input type="text" /><input type="text" /><hr/>
Combined application of CSS styles:
css can be used in conjunction with many tags in html
<head lang="en"> <meta charset="UTF-8"> <style type="text/css"> ul{ list-style-type:none; list-style-image: url(imgs/1.png); } table{ border-bottom: #0C0 double 3px; border-left:#F00 solid 3px;/*solid 实线*/ border-right:#FC0 dashed 3px;/*dashed 虚*/ border-top:#000 groove 3px; width: 600px; } table td{ border: #0CF dotted 2px; padding: 20px; } div{ border: #0F0 dashed 2px; height: 50px; width: 300px; } input{ border: none; border-bottom: #0CF 1px solid; } .Per{ border: none; } </style> <title>asd</title></head><body> 姓名:<input type="text" /> 年龄:<input type="text" /> <hr/> <div> div区域 </div> <hr/> <table ><!--html里<table border:.....>,与css结合后,在style设置即可--> <tr> <td><input type="text" class="Per"> </td> <td> 单元格二 </td> </tr> <tr> <td> 单元格三 </td> <td> 单元格四 </td> </tr> </table> <hr/> <ul> <li>你好</li> <li>你好</li> <li>你好</li> <li>你好</li> </ul></body>

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

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

The official account web page update cache, this thing is simple and simple, and it is complicated enough to drink a pot of it. You worked hard to update the official account article, but the user still opened the old version. Who can bear the taste? In this article, let’s take a look at the twists and turns behind this and how to solve this problem gracefully. After reading it, you can easily deal with various caching problems, allowing your users to always experience the freshest content. Let’s talk about the basics first. To put it bluntly, in order to improve access speed, the browser or server stores some static resources (such as pictures, CSS, JS) or page content. Next time you access it, you can directly retrieve it from the cache without having to download it again, and it is naturally fast. But this thing is also a double-edged sword. The new version is online,

The article discusses using HTML5 form validation attributes like required, pattern, min, max, and length limits to validate user input directly in the browser.

Article discusses best practices for ensuring HTML5 cross-browser compatibility, focusing on feature detection, progressive enhancement, and testing methods.

This article demonstrates efficient PNG border addition to webpages using CSS. It argues that CSS offers superior performance compared to JavaScript or libraries, detailing how to adjust border width, style, and color for subtle or prominent effect

The article discusses the HTML <datalist> element, which enhances forms by providing autocomplete suggestions, improving user experience and reducing errors.Character count: 159

This article explains the HTML5 <time> element for semantic date/time representation. It emphasizes the importance of the datetime attribute for machine readability (ISO 8601 format) alongside human-readable text, boosting accessibilit

The article discusses the HTML <progress> element, its purpose, styling, and differences from the <meter> element. The main focus is on using <progress> for task completion and <meter> for stati

The article discusses the HTML <meter> element, used for displaying scalar or fractional values within a range, and its common applications in web development. It differentiates <meter> from <progress> and ex
