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

1npm install -g create-react-app -> install create react app tools
2create-react-app app01 -> create your first projects app001
3

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

1C:\Users\username\Desktop\reactApp>npm install webpack webpack-dev-server webpack-cli --save
2

1C:\Users\username\Desktop\reactApp>npm install babel-core babel-loader babel-preset-env 
2   babel-preset-react html-webpack-plugin --save-dev
3