#Install Package in Node:

​

npm i express mongoose express-session ejs multer dotenv

​

#Install development (Package in local only)

​

npm i -D nodemon

Add the package with version user the dependencies and run command in 

  command prompt 

    npm install (enter)

Eg:

"dependencies": {

    "http": "^0.0.1-security"

    "https": "1.0.0"

  }

#how to install any specific package in nodejs Application

# Syntex

npm install packagename

​

# example:

npm install express

npm i express

​

#if you install globally then type 

npm install express -g