What is HTML?
HTML (HyperText Mark-up Language) is Hypertext Mark-up Language (an application under Standard Universal Mark-up Language) or Hypertext Link Mark-up Language. It is currently the most widely used language on the Internet and is also The main language that makes up web documents. HTML files are descriptive texts composed of HTML commands. HTML commands can describe text, graphics, animations, sounds, tables, links, etc. The structure of an HTML file includes two parts: Head and Body. The header describes the information required by the browser, and the body contains the specific content to be explained.
HTML files are files that can be read by a variety of web browsers to generate web pages that convey various types of information. In essence, the Internet is a collection of transmission protocols and various types of documents, of which HTML files are just one. These HTML files are stored on server hard drives distributed around the world. Through the transmission protocol, users can remotely obtain the information and information conveyed by these files.
Web browsers, such as Netscape Navigator or Microsoft Internet explorer, can interpret HTML files to display web pages. This is the main function of a web browser. When you use a browser to browse web pages on the Internet, the browser software automatically converts HTML files into web pages.
Simply put: HTML is a computer language used to create static web pages
What is CSS?
CSS is a computer language used to express document styles such as HTML (an application of Standard Generalized Markup Language) or XML (a subset of Standard Generalized Markup Language). The latest version of CSS is CSS3, which is a style design language that can truly separate web page performance and content.
Compared with the performance of traditional HTML, CSS can perform pixel-level precise control over the position and layout of objects in web pages, supports almost all font size styles, and has the ability to edit web page objects and model styles. , and can carry out preliminary interaction design. It is currently the best performance design language based on text display.
CSS can simplify or optimize the writing method according to the understanding ability of different users. It has strong readability for all types of people.
Simply put: CSS is used to change the appearance of html tags in the browser.
The above is the detailed content of What languages are HTML and CSS?. For more information, please follow other related articles on the PHP Chinese website!

Using ID selectors is not inherently bad in CSS, but should be used with caution. 1) ID selector is suitable for unique elements or JavaScript hooks. 2) For general styles, class selectors should be used as they are more flexible and maintainable. By balancing the use of ID and class, a more robust and efficient CSS architecture can be implemented.

HTML5'sgoalsin2024focusonrefinementandoptimization,notnewfeatures.1)Enhanceperformanceandefficiencythroughoptimizedrendering.2)Improveaccessibilitywithrefinedattributesandelements.3)Addresssecurityconcerns,particularlyXSS,withwiderCSPadoption.4)Ensur

HTML5aimedtoimprovewebdevelopmentinfourkeyareas:1)Multimediasupport,2)Semanticstructure,3)Formcapabilities,and4)Offlineandstorageoptions.1)HTML5introducedandelements,simplifyingmediaembeddingandenhancinguserexperience.2)Newsemanticelementslikeandimpr

IDsshouldbeusedforJavaScripthooks,whileclassesarebetterforstyling.1)Useclassesforstylingtoallowforeasierreuseandavoidspecificityissues.2)UseIDsforJavaScripthookstouniquelyidentifyelements.3)Avoiddeepnestingtokeepselectorssimpleandimproveperformance.4

Classselectorsareversatileandreusable,whileidselectorsareuniqueandspecific.1)Useclassselectors(denotedby.)forstylingmultipleelementswithsharedcharacteristics.2)Useidselectors(denotedby#)forstylinguniqueelementsonapage.Classselectorsoffermoreflexibili

IDsareuniqueidentifiersforsingleelements,whileclassesstylemultipleelements.1)UseIDsforuniqueelementsandJavaScripthooks.2)Useclassesforreusable,flexiblestylingacrossmultipleelements.

Using a class-only selector can improve code reusability and maintainability, but requires managing class names and priorities. 1. Improve reusability and flexibility, 2. Combining multiple classes to create complex styles, 3. It may lead to lengthy class names and priorities, 4. The performance impact is small, 5. Follow best practices such as concise naming and usage conventions.

ID and class selectors are used in CSS for unique and multi-element style settings respectively. 1. The ID selector (#) is suitable for a single element, such as a specific navigation menu. 2.Class selector (.) is used for multiple elements, such as unified button style. IDs should be used with caution, avoid excessive specificity, and prioritize class for improved style reusability and flexibility.


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

Atom editor mac version download
The most popular open source editor

WebStorm Mac version
Useful JavaScript development tools

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.

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

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft
