Web Front-end
HTML Tutorial
Getting started with CSS learning for beginners_html/css_WEB-ITnose
Getting started with CSS learning for beginners_html/css_WEB-ITnose
1. Basic learning
1. What is CSS
CSS is the abbreviation of Cascading Style Sheets. It is a markup language. It does not require compilation and can be directly used by the browser. Execution (belongs to browser interpreted language).
The CSS file can also be said to be a text file. It contains some CSS tags. The CSS file must use css as the file name suffix. You can simply change the CSS file , changing the overall presentation of a web page can reduce our workload, so it is a required course for every web designer.
2. Syntax
2.1 Quotation
Link type (href
<head> <link rel="stylesheet" type="text/css" href="http://www.dreamdu.com/style.css" /></head>
. >
Import style (@import
>
<head> <style type="text/css">@import url(http://www.dreamdu.com/style.css);</style></head>
Note: The style tag should be inside the head tag.
Inline styles
<style type="text/css">/* ----------文字样式开始---------- *//* 梦之都白色12象素文字 */.dreamduwhite12px { color:white; font-size:12px; }/* 梦之都黑色16象素文字 */.dreamdublack16px { color:black; font-size:16px; }/* ----------文字样式结束---------- */</style>Apply CSS styles directly to XHTML tags.
CSS selector is the name of a CSS style. When a CSS style is displayed in an XHTML document, a CSS is used.
<p style="font-size: 10px; color: #FFFFFF;"> 使用CSS内联引用表现段落.</p>
🎜>
>ID Selector
table > XHTML p{ font-size:12px;} www.dreamdu.com #id_selector{font-size:12px;} id与class选择符在CSS与XHTML中的用法总结 CSS中的写法 XHTML中的写法 标签选择符 p{font-size:12px;} www.dreamdu.com id选择符 #id_selector{font-size:12px;} 梦之都 class选择符 .class_selector{font-size:12px;} 梦之都 Dream City Separation of content and performance. With CSS, the content (XHMTL) and performance of the web page can be separated. Using CSS can reduce the amount of code on the web page and increase the browsing speed of the web page (1) They belong to different categories. Link belongs to the XHTML tag, and @import is completely a method provided by CSS. When a page is loaded (that is, when viewed by a viewer), the CSS referenced by link will be loaded at the same time, while the CSS referenced by @import will wait until the page is completely downloaded before being loaded. So sometimes when browsing the page where @import loads CSS, there will be no style at first (it just flickers), which is quite obvious when the network speed is slow. Since @import was proposed by CSS2.1, old browsers do not support it. @import can only be recognized by IE5 or above, but the link tag does not have this problem. When using JavaScript to control the dom to change the style, you can only use the link tag, because @import cannot be controlled by the dom. Tables are used for layout, and forms are used to transmit data. Forms can be included in tables, and tables can also be included in forms. Use tables to Lay out the data in the form, If you have data to provide to the background program, such as an input box, text box, etc., these elements usually need to be placed in a form so that the data submission can be completed. This article only organizes some simple content of CSS. As for other powerful functions, we still need to continue to explore and gradually deepen in future studies. Related reading: Basic basic CSS tutorial Summary of the usage of id and class selectors in CSS and XHTML
Writing in CSS Tag selector
id selector
< p id="id_selector">Dream City class selector td>
.class_selector{font-size:12px;}
3. Advantages
1. Map
2. Analysis of difficulties
2.1 The difference between link style (link) and import style (@import) in external reference CSS
In addition to loading CSS, the link tag can also do many other things, such as defining RSS, defining rel connection attributes, etc. @import can only load CSS.
(2) Difference in loading order.
(3) Differences in compatibility.
(4) Differences in using DOM to control styles.
2.2 The difference between tables and forms
3. Editor’s message
CSS is mainly used to control the style of web page display. Through CSS, the content in HTML can show brilliant effects, just like applying makeup to a person. If used appropriately, the effect will be good.
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
Is HTML easy to learn for beginners?
Apr 07, 2025 am 12:11 AM
HTML is suitable for beginners because it is simple and easy to learn and can quickly see results. 1) The learning curve of HTML is smooth and easy to get started. 2) Just master the basic tags to start creating web pages. 3) High flexibility and can be used in combination with CSS and JavaScript. 4) Rich learning resources and modern tools support the learning process.
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.
What is an example of a starting tag in HTML?
Apr 06, 2025 am 12:04 AM
AnexampleofastartingtaginHTMLis,whichbeginsaparagraph.StartingtagsareessentialinHTMLastheyinitiateelements,definetheirtypes,andarecrucialforstructuringwebpagesandconstructingtheDOM.
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.
How to implement adaptive layout of Y-axis position in web annotation?
Apr 04, 2025 pm 11:30 PM
The Y-axis position adaptive algorithm for web annotation function This article will explore how to implement annotation functions similar to Word documents, especially how to deal with the interval between annotations...
Gitee Pages static website deployment failed: How to troubleshoot and resolve single file 404 errors?
Apr 04, 2025 pm 11:54 PM
GiteePages static website deployment failed: 404 error troubleshooting and resolution when using Gitee...
How to use CSS3 and JavaScript to achieve the effect of scattering and enlarging the surrounding pictures after clicking?
Apr 05, 2025 am 06:15 AM
To achieve the effect of scattering and enlarging the surrounding images after clicking on the image, many web designs need to achieve an interactive effect: click on a certain image to make the surrounding...
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.
