What is web front end
The web front-end, also known as the "client", is about the visual aspects of the website that users can see and experience, that is, everything the user sees and displayed by the web browser , involving everything that users can see, touch and experience; that is, the web front-end includes the structure of the web page, the visual representation of the web's appearance, and the implementation of interaction at the web level.
The web front-end evolved from web page production, and its name has obvious characteristics of the times. In the evolution of the Internet, web page production is a product of the Web 1.0 era. The main content of early websites was static, mainly pictures and text, and users' behavior when using the website was mainly browsing. With the development of Internet technology and the application of HTML5 and CSS3, modern web pages are more beautiful, have significant interactive effects, and are more powerful.
How to learn web front-end?
Learning web front-end requires learning three essential basic skills: HTML, CSS, and JavaScript
These three are the three most basic and necessary skills in front-end development. In front-end development, when laying out the page, HTML defines the elements, CSS positions the displayed elements, and JavaScript is used to achieve corresponding effects and interactions. Although it looks simple on the surface, there are definitely many things that need to be mastered. Before developing, you need to clarify and understand these concepts, so that you will be comfortable during the development process.
In addition to these three core technologies that must be learned, there are other knowledge that we also need to master, such as jQuery, Ajax, various commonly used frameworks, and back-end technologies.
The above is the detailed content of What is web front end. For more information, please follow other related articles on the PHP Chinese website!

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Web front-end frameworks include: 1. Angular, a front-end framework for creating a single application interface; 2. React, a JavaScript development framework for building user interfaces; 3. Vue, a progressive framework for building user interfaces JavaScript framework; 4. Bootstartp, a front-end framework based on HTML, CSS, and JavaScript; 5. QUICK UI, a set of enterprise-level web front-end development solutions; 6. SUI, a front-end component library.

A web front-end engineer is an engineer who is engaged in Web front-end development. His main job is to develop, optimize, and improve the website. His main responsibility is to use various professional technologies to develop client products, and then combine the back-end development technology to simulate the overall effect and provide the website with The products and services provided on realize first-class web interfaces, optimize code and maintain good compatibility, and are committed to improving user experience through technology.
![[Hematemesis Compilation] The latest front-end interview questions and answers in 2023 (Collection)](https://img.php.cn/upload/article/000/000/024/62bbc4b816943531.jpg?x-oss-process=image/resize,m_fill,h_207,w_330)
This article summarizes some selected Web front-end interview questions worth collecting (with answers). It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

This article summarizes some selected Web front-end interview questions worth collecting (with answers). It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

I have summarized some web front-end interview (written test) questions to share with you. This article will first share with you the HTML part of the written test questions (with answers). You can do it yourself and see how many you can answer correctly!

Differences: 1. The front-end refers to the interface visible to the user, while the back-end refers to things invisible to the user. It considers the implementation of the underlying business logic, the stability and performance of the platform, etc. 2. The technologies used in front-end development include html5, css3, js, jquery, Bootstrap, Node.js, Vue, etc.; while the back-end development uses server technologies such as java, php, and HTTP protocol. 3. From the perspective of application scope, front-end development is not only well-known by ordinary people, but its application scenarios are much wider than that of back-end.

This article will help you quickly distinguish between H5, WEB front-end, large front-end, and WEB full stack. I hope it will be helpful to friends in need!

The default ports of the web standard are: 1. HTTP, the default port number is 80; 2. HTTPS, the default port number is 443; 3. FTP, the default port number is 21; 4. SSH, the default port number is 22; 5. Telnet , the default port number is 23; 6. SMTP, the default port number is 25; 7. POP3, the default port number is 110; 8. IMAP, the default port number is 143; 9. DNS, the default port number is 53; 10. RDP , the default port number is 3389 and so on.
