Synchronization of two Node.JS folders?

Question

Node.js

It is necessary to synchronize two folders on the server using Node.JS
Let's say there is a folder avatars , which has subfolders and they have files (png avatars).
Task: when changing the avatars folder , copy the changes to the avatars_two folder .
Interested in the finished module. Nobody met?

Answer 1

Maybe just make a symlink?
But if NodeJS is interested, then this is the fs.watch() method .