[Grimace original] road to the front-end of backend programmers 01, Grimace backend programmers 01

[Grimace original] road to the front-end of backend programmers 01, Grimace backend programmers 01

Directory

• What is Web
• What is HTML?
• What is CSS?
• Know what JavaScript is
• Understand how HTML and CSS work together
• Why use CSS?
• Additional reading

 

1. What is Web?

In generalUserPassBrowserTo access files on a computer.

2. What is HTML?

HTML (Hypertext Markup Language-Hypertext Markup Language), usedStructuredContent on the Web site and give itDescriptionOfMarkup Language.

3. What is CSS?

CSS (stacked style sheet), usedDecorationWebpage code.

It's like a girl (HTML) becomes more beautiful after being made up (CSS.

4. What is JavaScript?

JavaScript (scripting language) is used to implement special effects on Web pages.

It's like a controller.Action.

5. Understand how HTML and CSS work together

The browser converts HTML and CSS into a DOM structure and then presents the DOM content.

6. Why should I use CSS?

Separation of structure and performance:

1) avoid repetition: different pages have the same part to show the same effect.

2) easier maintenance

3) easier Scalability: Just like the skin of the blog Garden, the content is the same. Different skins are displayed differently and can be freely switched.

VII. Extended reading

Markup LanguageWhat are language, scripting language, and compilation language, and their differences?

1. markup language:

-- Only used to organize a relationship between different contents

For example, HTML (used to structure the content on the Web server) and XML (the text content is arranged according to certain rules and can be used as a configuration file and data transmission ")

2. compilation language

-- Write the code before executing it. It must be compiled into a machine language before it can be run by the computer.

For example: C # (write the code and the exe program will be generated after compilation)

3. Script Language

-- To shorten the traditionalCompile-compile-link-runThe computer programming language created in the process.

For example, JavaScript (after being written, it can be directly recognized by the browser)