Node JS tutorial for beginner

Question: What is NodeJS
Node.js is a platform built for fast and scalable network applications. It uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices. It can be used in Websites application, Android applicationa and IOS application etc.


Question: What type of framework is Nodejs?
NodeJS is JavaScript-based framework/platform



Question: Is Nodejs Server OR Cient Side?
Both, Node work for both.



Question: What is REPL?
REPL stands for Read Eval Print Loop
Node.js comes with virtual environment called REPL (also Node shell).


Question: What are most common REPL Commands?

ctrl + c

Terminate the current command.

ctrl + c twice 

terminate the Node REPL.

Up/Down Keys

see command history.

tab Keys

list of current commands.

.help

list of all commands.

.break

exit from multiline expression.

.save filename 

save the current Node REPL session to a file.

.load filename

load file content in current Node REPL session.



Question: How to exist from REPL?

ctrl + c twice 

Question: How to install module in NodeJS?

npm install express

for install express.


Question: How to uninstall module in NodeJS?

npm uninstall express

for uninstall express.

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