To install inside project

sudo npm install typescript ts-node express node @types/express @types/node nodemon @types/node

For Global Level install

npm install -g typescript ts-node

Install Mongoose

npm install mongoose @types/mongoose

Install body parser to read x-www-form-urlencoder

npm i body-parser @types/body-parser

For validation of req. use the 3rd party package

npm install --save express-validator

For validation of req. use the 3rd part package

npm install joi npm install --save @types/joi

HTTP Status Codes

 200-226 :  mean action requested by the client was recieved understood and accepted.
 200: success

 300-308 : status code indicate the client must take addition action to complete the request.
 307 Temporary Redirect 
 308 Permanent Redirect

 400-451 : this class of status code is intended for situations in which the error seems to have been 
           caused by the client.
 
 404 Not Found
 400 Bad Request
 401 Unauthorised
 402 Payment Required
 403 Forbidden

 500-511 : indicate case in which the server is aware that it has encountered an error or is otherwise
           incapable of performing the request.
           
 500 Internal Server Error
 502 Bad Gateway
 503 Service Unavailable

To send the email we have to use smpt server eg. Sendgrid

To make the connection with smpt server in node we will use Nodemailer

npm i nodemailer npm i @types/nodemailer

To connect the Nodemailer and Sendgrid we will use nodemailer-sendgrid-transporter

npm i nodemailer-sendgrid-transport

To Encrypt the password install node.bcrypt.js

npm i bcrypt

To install the jsonwebtoken

npm i jsonwebtoken
npm i @types/jsonwebtoken

To install the emailjs

npm install emailjs

-> And Use the api provided in the documentation.

To install multer to read the file.

npm i multer
npm i @types/multer
-> Internally it used the busboy to store the data.

For the CROWN JOB

npm i node-schedule npm i @types/node-schedule

Type of Indexes

Ex.: Take a scenario such as => name, age, Addr:[{zip:'201004'}] 1 and -1 denotes ascending or descending order.

1. Single Field : apply on single field Example: db.user.createIndex({name:1})

2. Compound : apply in multilple field where we form query with multiple conditions Example: db.user.createIndex({name:1, age:1})

3. Multi-Key : apply on field where exist multiple data for eg. there are
   multiple address of the single user. Example: db.user.createIndex({address.zip:1})

4. Text : Used in the case such as searching operations. Example: db.user.createIndex({name:'text'})

5. Geo Spatial : For eg. find the result which is near you geo-coordinates. Applied on Geographical Co-ordinates

About Indexing

• Just added in Scheme => index: { background: true, unique: true }

About Deployment in heroku

As in development environment the typescript is converted into js by the compiler but for the production environment we have to convert it into javascript.

To Convert to js write in package.json

• "create-bundle" : "tsc && node dist/index.js"
• "start" : "node dist/index.js"

To Check with LoadTest

• npm i loadtest -loadtest [-n requests] [-c concurrency] [-k] URL -loadtest -n 100 -c 20 -k "https://node-ts-blog.herokuapp.com/api/user/login"

For Web Scraping

• To get the html data from the website use "Request - Simplified HTTP client"

• npm i request

• npm i @types/request

• To get the specific data from the html use "cheerio"

• npm i cheerio

• npm i @types/cheerio

• Demo Website is "https://webscraper.io/test-sites/e-commerce/allinone"