creat react app

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 mon-app
2cd mon-app
3npm start

1yarn create react-app my-appCopied

1yarn create react-app my-app
2# or
3npx create-react-app my-app
4# or
5npm init react-app my-app
6
7cd my-app
8yarn start # or npm start