Namaste-React

• In this repository, I will be maintaining the notes, resources and assignments of Namaste React Web Series by Akshay Saini.
• Navigate to the episode number "0x" by going to the branch "0x" of this repository.
• Eg. Episode 02 is on branch 02 of the repository.
• Exception: Episode 01 is on the main branch!!

HomeWork Questions

1. What is Emmet? Read More

• It is a plugin used to auto-generate boiler-plate code. For example, we can use '!' to generate HTMl boilerplate code
• We can use abbreviations/short expressions to generate HTML and CSS.
• It is a toolkit that makes writing HTML, CSS code really easy!

2. Difference between Library and Framework?

Library:

• Library is one that can be applied to any part of our existing app.
• It does not INVERT THE CONTROL since the control is in the hands of the programmer who can use it where and when required
• React is a library since it can be applied to any portion of our app like navbar or header etc.

Framework:

• Framework is a whole full-fledged program that is used to build a whole app.
• It INVERTS THE CONTROL since it provides the developer some places to plug in their code. It calls that code only as needed.
• React is not a framework but a library.

3. What is CDN and Why Do we use it?

4. Why is React called React?

• Because it is "Reacts" to any state or property changes, and works with data of any form (as deeply structured as the graph itself) so the name is fitting.

5. What is the cross-origin in script tag? Read More

• It is an attribute that we add to the script tag to tell the browser that no credentials are needed for accessing this script. So we allow cross-origin sharing with this attribute.

6. What is the difference between React and ReactDOM?

• React is the library that provides the core React code. This is the fundamental code needed to run React anywhere
• ReactDOM is that React library for performing DOM operations. It is specific to the browser. It is bridge between React and Browsers. Enables runnning React in browser.
• We know React does not just run in Browsers, but also on Mobile, Android, etc. So we have different libraries for executing React on different platforms.
• So we need 2 separate packages in our app.

7. What is the difference between react.development.js and react.production.js files via CDN ?

• The React library provides two versions of its JavaScript files: react.development.js and react.production.js. The react.development.js is used in development stage/environment while the other is for production environment.
• The react.development.js file is larger in size compared to react.production.js.The development version contains additional code, comments, and debugging information that aids in development and troubleshooting.
• The development version (react.development.js) provides more detailed error messages and warnings compared to the production version. So it helps in better diagnostics
• The production version is optimized for performance and has undergone various optimizations, including minification and removal of unnecessary code, resulting in a smaller file size.

8. What is the difference between async and defer attribute?Akshay's Video

• Both are attributes given to script tags.
• <script src = ""/>: Without any attribute in the script tag, the HTML parsing goes on
• <script async src = ""/> : In this case, the HTML parsing goes on. When script tag is encountered, it is fetched from the network asynchronously parallel to HTML parsing. Then HTML parsing is paused and the script is executed. Once the script execution is complete, then HTML parsing resumes.
• <script defer src = ""/> : In this case, the HTML parsing goes on and the scripts are fetched in parallel. Then once the HTML parsing is complete, then the scripts are executed. It does not matter when the scripts are available in the browser.
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