


Collection of commonly used tools for WEB front-end designers_Basic knowledge
The following are some commonly used plug-ins, tools, software, etc. that I compiled and collected for front-end development. They are equivalent to making a small backup for your computer. As for how to use them, I will summarize them in the future. For now, you can just google them yourself. .
【FireFox plug-in】
1. Firefbug —— Page debugging tool
2. YSlow —— Web page rating tool
3. Pixel Perfect —— Comparison between HTML and design draft
4. CSS Usage —— CSS usage efficiency optimization tool
5. Page Speed —— Quickly optimize web pages similar to YSlow
6. Measureit —— Real-time measurement tool
7. Fiddler —— A powerful tool for local adjustment of page styles
8. DNS flusher —— DNS refresh tool
9. Colorzilla —— Real-time color selection tool
10. Web Developer —— Check the relevant information of the web page
11. FireMobileSimulator —— Simulate mobile phone
12. JavaScript Dubugger —— JavaScript Troubleshooting
13. Greasemonkey —— Script applet
14. Firecookie —— Cookie
【Chrome plug-in】
1. Awesome Screenshot —— Web page screenshot
2. user-Agent Switcher —— Switch display device
3. web Developer —— Check the relevant information of the web page
4. Window Resizer —— Change resolution
5. YSlow —— Web page rating tool
6. Browser compatibility detection
[Commonly used URL tools for front-end development]
Web color matching
http://www.peise.net/tools/web/
http://www.peise.net/tools/lilun/lilunxuexi.html
http://www.colorschemer.com/online.html
http://www.workwithcolor.com/hsl-color-picker-01.htm
CSS3 Generator
http://www.flickyard.in/autocss3/
http://www.colorzilla.com/gradient-editor/
http://ie.microsoft.com/testdrive/Graphics/CSSGradientBackgroundMaker/
CSS3 Button Generator
http://www.wordpressthemeshock.com/css-drop-shadow/
http://css3buttongenerator.com/
CSS Image Composer
http://cn.spritegen.website-performance.org/
CSS code inspection
ajax loading image
CSS hack table
http://centricle.com/ref/css/filters/
Browser Market
http://tongji.baidu.com/data/browser
Test browser support for CSS3
http://kimblim.dk/css-tests/selectors/
http://www.findmebyip.com/litmus
Detect user experience
CSS Template Generator
http://blog.html.it/layoutgala/
http://www.intensivstation.ch/en/templates/
CSS Compression
Common CSS fonts
http://www.google.com/webfonts#
CSS3 Transform
http://www.useragentman.com/IETransformsTranslator/
CSS3 Bezier Curve
http://cubic-bezier.com/#.47,.73,1,.41
YUI CSS grid tool
http://developer.yahoo.com/yui/grids/builder/
JavaScript code optimization and beautification
Code Demo
http://ikeepu.com/bar/20143449
Prototype design tool
https://gomockingbird.com/mockingbird/#
[Local and commonly used software and IDE editors]
1. MarkMan —— Designer, a must for front-end engineers
2. VIM —— Super fast editor
3. Adobe PhotoShop CS6 —— Exclusively for image cutting
4. IE Tester —— Check page compatibility
5. Fiddler2 —— Detection request
6. Beyond Commpar —— File comparison
7. GIT —— Distributed version control
8. Opera Mobile Emulator —— Mobile browser
9. SimpLESS —— LESS
Congratulations on mastering most of the above tools, you are not far from becoming an excellent front-end designer~~

JavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.

Python is more suitable for data science and automation, while JavaScript is more suitable for front-end and full-stack development. 1. Python performs well in data science and machine learning, using libraries such as NumPy and Pandas for data processing and modeling. 2. Python is concise and efficient in automation and scripting. 3. JavaScript is indispensable in front-end development and is used to build dynamic web pages and single-page applications. 4. JavaScript plays a role in back-end development through Node.js and supports full-stack development.

C and C play a vital role in the JavaScript engine, mainly used to implement interpreters and JIT compilers. 1) C is used to parse JavaScript source code and generate an abstract syntax tree. 2) C is responsible for generating and executing bytecode. 3) C implements the JIT compiler, optimizes and compiles hot-spot code at runtime, and significantly improves the execution efficiency of JavaScript.

JavaScript's application in the real world includes front-end and back-end development. 1) Display front-end applications by building a TODO list application, involving DOM operations and event processing. 2) Build RESTfulAPI through Node.js and Express to demonstrate back-end applications.

The main uses of JavaScript in web development include client interaction, form verification and asynchronous communication. 1) Dynamic content update and user interaction through DOM operations; 2) Client verification is carried out before the user submits data to improve the user experience; 3) Refreshless communication with the server is achieved through AJAX technology.

Understanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.


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