Mr. Basic CSS Skills--Selector_html/css_WEB-ITnose
We have already talked about the understanding of CSS and the box model before, and also talked about its uses. For details, you can read this article.
Import CSS (import namespace)
Let’s talk about it bit by bit. First of all, it is to modify web pages, that is, to modify elements in HTML. The reason why it is convenient , mainly because it can centrally process each element in HTML, just like our functions. But if we want to use a certain function, do we first have to import its namespace? It is the same in HTML, of course. The methods are slightly different, but the idea is still the same. The following is the concentration method.
//行内样式 <p style="color:#FF0000; font-size:20px; text-decoration:underline;">123</p> //链接式 <link href="1.css" type="text/css" rel="stylesheet"> </head> <body> <h2>CSS标题</h2> <p>紫色，出题，下划线</p> </body> //内嵌式 <style type="text/css"> <!-- p{ color:#FF00FF; text-decoration:underline; font-weight:bold; font-size:25px; } //导入样式 <style type="text/css"> <!-- @import url(1.css); --> </style>#, space, dot and colon in CSS format
in CSS , we often see such a format
#navigation li a:link, #navigation li a:visited{ background-color:#7591a3; color:#FFFFFF; }What does this format mean? Let me tell you, it is actually a CSS selector, and the selector includes 1. Tag selector, category selector, and ID selector.
1. Tag selector (written in HTML)
<style> h1{ color:red; font-size:25px; } </style>
3. ID selector
So you will know the above code. He is actually setting up such a sentence in HTML. Set the color and font size of the button text in the code below.
<span style="font-size:14px;"> <div id="navigation"> <li><a>按钮</a></li> </div></span>
<span style="font-size:14px;"> <span style="font-size:18px;">#navigation li a:link</span></span>
For example, the above code is the separation of div block, li block and a block
Summary
Here It’s just a simple introduction, the basic syntax introduced, and the specific settings of some specific attributes. Let’s stay in the next blog and compare it with the CS things I learned. It is very similar to our class, and they are all encapsulated. Classes, just because these "classes" of hers are all encapsulated, so if I want to use them, I have to pay attention to the CSS format, but the advantage is that he is more thoughtful than we think, and encapsulates everything that can be used. .
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
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
1663
14
1420
52
1313
25
1266
29
1237
24
Understanding HTML, CSS, and JavaScript: A Beginner's Guide
Apr 12, 2025 am 12:02 AM
WebdevelopmentreliesonHTML,CSS,andJavaScript:1)HTMLstructurescontent,2)CSSstylesit,and3)JavaScriptaddsinteractivity,formingthebasisofmodernwebexperiences.
The Roles of HTML, CSS, and JavaScript: Core Responsibilities
Apr 08, 2025 pm 07:05 PM
HTML defines the web structure, CSS is responsible for style and layout, and JavaScript gives dynamic interaction. The three perform their duties in web development and jointly build a colorful website.
HTML, CSS, and JavaScript: Essential Tools for Web Developers
Apr 09, 2025 am 12:12 AM
HTML, CSS and JavaScript are the three pillars of web development. 1. HTML defines the web page structure and uses tags such as, etc. 2. CSS controls the web page style, using selectors and attributes such as color, font-size, etc. 3. JavaScript realizes dynamic effects and interaction, through event monitoring and DOM operations.
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.
The Future of HTML: Evolution and Trends in Web Design
Apr 17, 2025 am 12:12 AM
The future of HTML is full of infinite possibilities. 1) New features and standards will include more semantic tags and the popularity of WebComponents. 2) The web design trend will continue to develop towards responsive and accessible design. 3) Performance optimization will improve the user experience through responsive image loading and lazy loading technologies.
The Future of HTML, CSS, and JavaScript: Web Development Trends
Apr 19, 2025 am 12:02 AM
The future trends of HTML are semantics and web components, the future trends of CSS are CSS-in-JS and CSSHoudini, and the future trends of JavaScript are WebAssembly and Serverless. 1. HTML semantics improve accessibility and SEO effects, and Web components improve development efficiency, but attention should be paid to browser compatibility. 2. CSS-in-JS enhances style management flexibility but may increase file size. CSSHoudini allows direct operation of CSS rendering. 3.WebAssembly optimizes browser application performance but has a steep learning curve, and Serverless simplifies development but requires optimization of cold start problems.
HTML vs. CSS vs. JavaScript: A Comparative Overview
Apr 16, 2025 am 12:04 AM
The roles of HTML, CSS and JavaScript in web development are: HTML is responsible for content structure, CSS is responsible for style, and JavaScript is responsible for dynamic behavior. 1. HTML defines the web page structure and content through tags to ensure semantics. 2. CSS controls the web page style through selectors and attributes to make it beautiful and easy to read. 3. JavaScript controls web page behavior through scripts to achieve dynamic and interactive functions.
HTML: Building the Structure of Web Pages
Apr 14, 2025 am 12:14 AM
HTML is the cornerstone of building web page structure. 1. HTML defines the content structure and semantics, and uses, etc. tags. 2. Provide semantic markers, such as, etc., to improve SEO effect. 3. To realize user interaction through tags, pay attention to form verification. 4. Use advanced elements such as, combined with JavaScript to achieve dynamic effects. 5. Common errors include unclosed labels and unquoted attribute values, and verification tools are required. 6. Optimization strategies include reducing HTTP requests, compressing HTML, using semantic tags, etc.
