React is a free and open-source front-end JavaScript library for building user interfaces based on components by Facebook Inc. It is maintained by Meta and a community of individual developers and companies. React can be used to develop single-page, mobile, or server-rendered applications with frameworks like Next.js

Advantages:
Easy to learn: React JS is easy to learn and apply, which helps developers quickly adapt to the technology.
Search engine optimization: React JS websites are SEO-friendly and rank higher in search engines because of their fast rendering speed and server-side rendering feature.
Virtual DOM: React JS's virtual DOM helps develop fast applications at a flexible pace.
Debugging: React JS has a large community that makes testing easy and straightforward.
Unidirectional data flow: React JS's unidirectional data flow helps streamline application data.

A      Introduction to HTML   

1. Introduction
2. Basic tags
3. Background, bgcolor, br, p etc.
4. Table basic & Merge tables
5. Forms with different input types

B      Introduction to CSS   

1. Introduction
2. DIV with examples
3. Class & ID with examples
4. Different properties with examples

C     Introduction to JavaScript   

1. Introduction
2. Inbuilt dialog box – alert, confirm & prompt
3. Programming construct – if else, switch case, loop etc.
4. Form validation with examples
5. Email validation with examples

D     Introduction to React

1. React Introduction
2. React Render HTML
3. React Props
4. React Events
5. React Conditional Rendering
6. React Lists
7. React Forms etc .