Answers for "create nw react app"

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+.

react create app

yarn create react-app my-app
# or
npx create-react-app my-app
# or
npm init react-app my-app

cd my-app
yarn start # or npm start