install react app

1RUN IN CMD
2
3npm install -g create-react-app

1npx create-react-app my-app
2cd my-app
3npm start

1npx create-react-app <appname>  //  eg:  npx create-react-app blog
2cd <appname>  // cd blog
3npm start  //runs on localhost:3000

1npx create-react-app project-name

1npx create-react-app my-app
2cd my-app
3npm start
4//Note:npx on the first line is not a typo — 
5//it’s a package runner tool that comes with npm 5.2+.

1yarn add create-react-app OR npm install create-react-app
2npx create-react-app my-app
3cd my-app
4npm start