react js project code example

Example 1: npx create-react-app

npx create-react-app my-app
cd my-app
npm start

Example 2: new create react app

npx create-react-app my-app
cd my-app
npm start
//Note:npx on the first line is not a typo — 
//it’s a package runner tool that comes with npm 5.2+.

Example 3: create react app

yarn add create-react-app OR npm install create-react-app
npx create-react-app my-app
cd my-app
npm start

Example 4: what is react

This is a formatted version of Komadori's answer 
(https://tinyurl.com/Komadori)
React is a JavaScript library for building user interfaces. 
It is maintained by Facebook and a community of 
individual developers and companies. 
React can be used as a base in the development of single-page 
or mobile applications.