CSS (Cascading Style Sheets) is an integral part of web design, which determines the style and layout of web pages. This article will teach you how to write good CSS.
Step one: Choose the appropriate selector
The selector is the most basic element in CSS, which is used to select the HTML element to be acted upon. There are many types of selectors and we need to choose the appropriate selector.
ID selector (#): used to select a unique HTML element, such as
.Class selector (.): used to select HTML elements with the same category, such as
.Tag selector: used to select specific HTML elements, such as
.Descendant selector: used to select elements within a certain element, such as the p element in
Pseudo-class selector: used to select HTML elements in a specific state, such as: hover.
Step 2: Set the style
Setting the style in the selector is the core of CSS. When designing styles, we need to select different attributes according to design requirements and set corresponding values.
Common CSS properties include:
color: Set the text color.
background-color: Set the background color.
font-size: Set the font size.
font-weight: Set the font weight.
text-align: Set text alignment.
margin: Set the margin of the element.
padding: Set the padding of the element.
border: Set the border of the element.
Step Three: Style Optimization
Optimizing styles can make web pages more beautiful and improve user experience. Here are some optimization tips:
Use font icons: Font icons can be set in color and size through CSS and will not affect web page loading speed.
Reduce pictures: Use tools to compress pictures to the smallest possible size without distortion.
Merge files: Merge CSS files and JavaScript files into one file to reduce web page loading time.
Use CSS framework: Using CSS framework can simplify style design.
Step 4: Compatibility and Responsive Design
When designing CSS, we need to consider the differences between different browsers. In order to ensure that web pages can be displayed normally in different browsers, we need to conduct compatibility testing and use different CSS codes for different browsers.
Responsive design is an adaptive web design based on different resolutions and device sizes. We can use CSS media queries to achieve responsive design. For example:
@media screen and (max-width: 600px) {
body {
background-color: yellow;
}
}
This CSS code will be on the screen Set the background color of the web page to yellow when the resolution is less than 600 pixels.
Summary
CSS is an indispensable part of web design. We need to choose appropriate selectors, set styles, optimize styles, consider compatibility and responsive design to write CSS well. . These techniques can help us design more beautiful and easier-to-use web pages.
The above is the detailed content of how to write css. For more information, please follow other related articles on the PHP Chinese website!

useState allows state to be added in function components because it removes obstacles between class components and function components, making the latter equally powerful. The steps to using useState include: 1) importing the useState hook, 2) initializing the state, 3) using the state and updating the function.

React's view focus manages complex application state by introducing additional tools and patterns. 1) React itself does not handle state management, and focuses on mapping states to views. 2) Complex applications need to use Redux, MobX, or ContextAPI to decouple states, making management more structured and predictable.

IntegratingReactwithotherlibrariesandframeworkscanenhanceapplicationcapabilitiesbyleveragingdifferenttools'strengths.BenefitsincludestreamlinedstatemanagementwithReduxandrobustbackendintegrationwithDjango,butchallengesinvolveincreasedcomplexity,perfo

TomakeReactapplicationsmoreaccessible,followthesesteps:1)UsesemanticHTMLelementsinJSXforbetternavigationandSEO.2)Implementfocusmanagementforkeyboardusers,especiallyinmodals.3)UtilizeReacthookslikeuseEffecttomanagedynamiccontentchangesandARIAliveregio

SEO for React applications can be solved by the following methods: 1. Implement server-side rendering (SSR), such as using Next.js; 2. Use dynamic rendering, such as pre-rendering pages through Prerender.io or Puppeteer; 3. Optimize application performance and use Lighthouse for performance auditing.

React'sstrongcommunityandecosystemoffernumerousbenefits:1)ImmediateaccesstosolutionsthroughplatformslikeStackOverflowandGitHub;2)Awealthoflibrariesandtools,suchasUIcomponentlibrarieslikeChakraUI,thatenhancedevelopmentefficiency;3)Diversestatemanageme

ReactNativeischosenformobiledevelopmentbecauseitallowsdeveloperstowritecodeonceanddeployitonmultipleplatforms,reducingdevelopmenttimeandcosts.Itoffersnear-nativeperformance,athrivingcommunity,andleveragesexistingwebdevelopmentskills.KeytomasteringRea

Correct update of useState() state in React requires understanding the details of state management. 1) Use functional updates to handle asynchronous updates. 2) Create a new state object or array to avoid directly modifying the state. 3) Use a single state object to manage complex forms. 4) Use anti-shake technology to optimize performance. These methods can help developers avoid common problems and write more robust React applications.


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

SublimeText3 Linux new version
SublimeText3 Linux latest version

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.

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

Zend Studio 13.0.1
Powerful PHP integrated development environment
