nodejs-training/notes at master · arvindbasant/nodejs-training · GitHub

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NodeJs Training

## source code - https://github.com/arvindbasant/nodejs-training

## https://github.com/arvindbasant/lattice

fs or os modules

-- preflight request

Domain Driven Design

-- Design Patterns

Event Driven Architecture

MVC
MVVM

CSV -> Col1 Col2

col1-> userid
col2-> email

col1-> userid
col2-> email
col3-> username -> from email tru


buffer -> 3 & 1/2 -> 3

1/2 + 3.25


Axios -> api call in cross domain

send -> OPTIONS request -> if auth -> 200OK ->


abc.com -> xyz.com(abc.com)
POST -> Axios -> OPTIONS call to check if abc.com is whitelisted


####

crypto module of nodejs

Cipher/Decipher
DiffieHellman/ECDH
HASH - MD5, SHA256 - aragon2, PBKDF2, scrypt, bcrypt
HMAC
Sign/Verify


## cors
https://bigcodenerd.org/enable-cors-node-js-without-express/
https://expressjs.com/en/resources/middleware/cors.html

https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/OPTIONS


##
setTimeout(console.log('2'), 0) // Book - You don't know JS -> download pdf
console.log([] + [])