Nodemon is tool to improve backend JS development. It reloads files automatically so you don't have to restart the server every time. Another cool thing is that you can debug the code in chrome dev tools.
Lets take the express generated site as environment.
Fist we need to install nodemon.
$ npm i nodemon
Then run nodemon with
$ node ./node_modules/nodemon/bin/nodemon.js --inspect ./bin/www
You can browse the code and even set breakpoints by clicking on the line number. This way you can inspect variables without having to use
When you are done, click play icon to continue execution of a program.
Thanks @mxstbr for bringing this up.