What are some important things to learn in Node.js

Question

here are some things that I feel are necessary
- Reading and writing to file
- creating a server

What else is missing?

Answer 1

Nodejs has wider topics:
The following topics are all important to node developers:

Package Manager (NPM)
Callbacks Concept
Event Loop
Event Emitter
Buffers
Streams
File System
Global Objects
Utility Modules
Web Module
Express Framework