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

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

1npx create-react-app project-name

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

1to override yarn
2npx create-react-app my-app --use-npm

1npm install --save typescript @types/node @types/react @types/react-dom @types/jest
2
3# or
4
5yarn add typescript @types/node @types/react @types/react-dom @types/jest