REACT.js set up from the scratch

Set up(cmd)

cd Documents
npm i npx -g
npx create-react-app projectA //name of app
cd projectA
code . //executes vscode

why npx?
npx will execute 'create-react-app' and download react-app. Once it's done, it will remove them from the computer. You don't want to have the module which you dont really use.
Also, it will execute newest version always.