npm WARN npm npm does not support Node.js v9.1.0

It turns out that the current installed npm is not compatible with the new node and has a hard time updating.

The solution is to uninstall npm and then reinstall node which will contain the correct version of npm.

Here’s how:

1. Uninstall npm.

   Mac:
   sudo npm uninstall -g npm
   
   Windows:
   npm uninstall -g npm
   

2. Install node from https://nodejs.org