[Front end] 1. Background knowledge and learning route

Series of article links
1. Background knowledge and learning route
2. Basic knowledge of HTML
3. Basic knowledge of
CSS 4. Basic knowledge of JavaScript

1 Definition: what is a front end

The front end refers to the part of web development that directly interacts with users, usually referring to the user interface part of a website or application, including technologies such as HTML, CSS, and JavaScript. The main task of front-end development is to convert the design draft of a website or application into an interactive web page or application, providing a good user experience and interaction.

HTML is a language used to define the structure and content of a web page. It can define elements such as text, pictures, and links in a web page; CSS is used to define the style of a web page, such as color, font, layout, etc.; JavaScript is used to realize web page interaction A scripting language with dynamic effects, such as responding to the user's click event, obtaining user input, changing the display effect of the page, etc.

In addition, the front end also involves some other technologies and tools, such as front-end frameworks and libraries (such as React, Vue.js, jQuery, etc.), CSS preprocessors (such as Sass, Less, etc.), construction tools (such as Webpack , Grunt, Gulp, etc.), etc. These tools can help front-end developers improve development efficiency and website performance, and can achieve more complex interactive effects.

2 What is the use of learning front-end development

1. Website development: design and develop responsive and interactive websites through front-end technology, and optimize the website to improve user experience.
2. Mobile application development: Through front-end technology, develop web-based mobile applications that can run on multiple platforms, such as iOS, Android, etc.
3. Web application development: Through front-end technology, design and develop web-based applications to realize complex business logic and interactive effects, such as online shopping, social networking, online games, etc.
4. UI/UX design: design and develop user interface and user experience through front-end technology, realize the visual and interactive effects of websites and applications, and improve user satisfaction and stickiness.
5. Front-end framework and library development: use front-end technology to develop front-end frameworks and libraries, such as React, Vue.js, jQuery, etc., to improve front-end development efficiency and reusability.

3 Front-end development learning roadmap

The learning roadmap of front-end development can be roughly divided into the following stages:

1. Learn the basics of HTML, CSS, and JavaScript

   In the learning of front-end development, you first need to learn basic knowledge such as HTML, CSS and JavaScript. This knowledge is the basis for building web applications, including web page layout, style design, DOM manipulation, event handling, and more.

2. Front-end framework and library learning

   After mastering the basics, learn popular front-end frameworks and libraries such as React, Vue.js, Angular, and more. These frameworks and libraries can help front-end developers quickly build complex web applications and improve development efficiency and reusability.

3. Front-end engineering and construction tools learning
   Front-end engineering and construction tools can help front-end developers improve development efficiency and code quality, including automated construction, code separation, modularization, performance optimization, etc. At this stage, you can learn common construction tools, such as Webpack, Gulp, etc.

4. Mobile terminal development and responsive design learning
   In the current mobile Internet environment, mobile terminal development and responsive design have become important areas that cannot be ignored in front-end development. You can learn the knowledge of mobile terminal development, such as React Native, Flutter, etc., and the knowledge of responsive design, such as Flexbox, Grid, etc.

5. Web security and performance optimization learning
   Finally, front-end developers also need to learn the knowledge of web security and performance optimization. This knowledge can help front-end developers prevent web applications from being hacked and improve web application performance and user experience.