React is a Javascript library for building frontend application or UI. React Js allows us to create reusable UI Component. Component are the building blocks of any React App. Technically Component is a class or fumction which perform a particular work.

Advantages of React Js:

1.Reusable Component.

2.Open Source

3.Efficient and Fast

4.Works in Browser

5.Large Community

How react work

Setup React Js Project using NPM

npx create-react-app app_name