nodemon

nodemon is a utility that monitors your Node.js application for any changes and once it does detect changes, automatically restarts your server. This makes it ideal for development, as it conveniently restarts your process automatically when your code changes. There's no need for any additional changes to your code or method of development. Simply use nodemon instead of node to run your code.

nodemon is a replacement wrapper for node, wrapping your application so you can pass all the arguments you would normally pass to your app. Installing and using nodemon is easy. Even if you need to manually restart your application, you can simply type rs with a carriage return, and nodemon will restart your process.