how to use and install react js code example

Example 1: install react js

npx create-react-app <appname>  //  eg:  npx create-react-app blog
cd <appname>  // cd blog
npm start  //runs on localhost:3000

Example 2: how to install react js

C:\Users\Tutorialspoint\Desktop\reactApp>npm install react --save
C:\Users\Tutorialspoint\Desktop\reactApp>npm install react-dom --save