Node.js is an open source server environment which runs on various platforms (Windows, Linux, Unix, Mac OS X, etc.). It uses JavaScript on the server.
Node.js runs single-threaded, non-blocking, asynchronously programming, which is very memory efficient.
Node.js can generate dynamic page content. It can manipulate files on server and collect data.
To install node js and npm on Mac follow steps:
Step 1: Type below command
$ brew install node
Step 2: Type below 2 commands if you are getting link error
$ brew link node
$ rm /usr/local/share/systemtap/tabsep/node.stp
Step 3: Verify node installed by typing below command
$ node -v
$ npm -v
Uninstall Node
$ brew uninstall node
$ brew autoremove
Update Node
$ brew update
$ brew upgrade node