Node JS: beginners to Advanced Concepts


Node JS: beginners to Advanced Concepts

nodejs: beginners to advanced concepts node js backend node js hello word node js web server node app nodejs microservice nodejs portable full course.

What Will I Learn?

  • Absolutely master the Event Loop and understand each of its stages
  • Utilize Worker Threads and Clustering to dramatically improve the performance of Node servers
  • Speed up database queries with caching for MongoDB backed by Redis
  • Add automated browser testing to your Node server, complete with continuous integration pipeline setup
  • Apply scalable image and file upload to your app, utilizing AWS S3


  • Basic knowledge of Node, Express, and MongoDB
  • Strong knowledge of Javascript


Go beyond the basics of Node!  This course will give you the skills needed to become a top Node engineer.

Go beyond the basics of Node!  This course will give you the skills needed to become a top Node engineer.

Query Caching with Redis? You will learn it.  The Node Event LoopIncluded.  Scalable File UploadOf course!

This is a must-take course if you work with Node.

Node Internals: Here’s one of the most common interview questions you’ll face when looking for a Node job: “Can you explain Node’s Event Loop?” There are two types of engineers: those who can describe the Event Loop and those who cannot!  This course will ensure that you are incredibly well prepared to answer that most important question.  Besides being critical for interviews, knowledge of the Event Loop will give you a better understanding of how Node works internally.  Many engineers know not to ‘block’ the Event Loop, but they don’t necessarily understand why.  You will be one of the engineers who can clearly articulate the performance profile of Node and its Event Loop.

Caching with Redis: We’ll also supercharge the performance of database queries by implementing caching backed by Redis.  No previous experience of Redis is required!  Redis is an in-memory data store purpose built for solving caching needs.  By adding caching to your application, you can decrease the amount of time that any given request takes, improving the overall response time of your app.

File Upload: There are many resources online that offer suggestions on how to handle file upload, but few show a solution that can truly scale.  Hint: saving files directly on your server isn’t a scalable solution!  Learn how to leverage AWS S3 to implement file upload that can scale to millions of users with a few dozen lines of simple code.  Plentiful discussions are included on security concerns with handling uploads, as well.

Continuous Integration Testing: This is a must have feature for any serious production app.  We’ll first learn how to test huge swaths of our codebase with just a few lines of code by using Puppeteer and Jest.  After writing many effective tests, we’ll enable continuous integration on Travis CI, a popular – and free – CI platform.  Testing can sometimes be boring, so we’ll use this section to brush up on some advanced Javascript techniques, including one of the only legitimate uses of ES2015 Proxies that you’ll ever see!

Node.js HTTP Module

The Built-in HTTP Module

Node.js has a built-in module called HTTP, which allows Node.js to transfer data over the Hyper Text Transfer Protocol (HTTP).

To include the HTTP module, use the require() method:

var http = require('http');

Node.js as a Web Server

The HTTP module can create an HTTP server that listens to server ports and gives a response back to the client.

Use the createServer() method to create an HTTP server:

var http = require('http');

//create a server object:
http.createServer(function (req, res) {
  res.write('Hello World!'); //write a response to the client
  res.end(); //end the response
}).listen(8080); //the server object listens on port 8080

SQL Server in Node.js

Learn how to access relational database MS SQL Server 2012 in Node.js application using Express.js in this section.

In order to access MS SQL database, we need to install drivers for it. There are many drivers available for SQL server in NPM. We will use mssql driver here.

Now, create server.js and write the following code.

var express = require('express');
 var app = express();
 app.get('/', function (req, res) { 

    var sql = require("mssql"); 

// config for your database 
var config = {
 user: 'sa',
 password: 'mypassword',
 server: 'localhost',
 database: 'SchoolDB' 
 // connect to your database 

sql.connect(config, function (err) { 

if (err) console.log(err); 
// create Request object 

var request = new sql.Request(); 
// query to the database and get the records request.query('select * from Student', function (err, recordset) { 
if (err) console.log(err) 
// send records as a response 

var server = app.listen(5000, function () {
 console.log('Server is running..'); 

nodejs backend

Before we get into it, let’s just remind ourselves what Node.js is exactly:

It’s a JavaScript runtime built on Chrome’s V8 JS engine. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient.

Now I know the intro painted Node as a developer nightmare. Truth is it’s become widely popular. But don’t take my word for it:

Stack Overflow’s developer survey for 2017 shows that it’s currently the most used technology by developers.

It’s also the language with the fastest growing popularity over the last five years, whereas languages like C# and PHP are losing steam. JavaScript itself is also on the way up.

How can we explain the rapid shift from the original backlash to the mainstream acceptance for Node.js and JavaScript as a backend language?

To put it simply, Node has outlived the “just a fad” period and entered a solid maturity state. It has built a strong and ever-growing community & ecosystem around itself. In fact, its package manager, npm, is now the largest software registry on the web.

Node.js not only revolutionized backend web development but also contributed to bringing performance to the frontend by bringing serious engineering to the client-side. It’s also played a part in the expansion of the overall JavaScript ecosystem and the improvement of modern JS frameworks such as AngularReact or Vue.

Over time, it has proven wrong many of the preconceptions people had in its early days:

JavaScript & Node.js are notoriously difficult to debug.

→ You can leverage the same debugging experience you have in the frontend using node-inspector which packages Chrome’s native Dev Tools.

Folks at Joyent also know a thing or two about advanced Node debugging & profiling: their DTrace universal debugger was released a long time ago!

Node JS: beginners to Advanced Concepts! we’ll learn:

  • Master the Node Event Loop – understand how Node executes your source code.
  • Understand the purpose of Node, and how the code you write is eventually executed by C++ code in the V8 engine
  • Add a huge boost to performance in your Node app through clustering and worker threads
  • Turbocharge MongoDB queries by adding query caching backed by a lightning-fast Redis instance
  • Scale your app to infinity with image and file upload backed by Amazon’s S3 file service
  • Implement a continuous integration testing pipeline so you always know your project functions properly
  • Think you know everything there is about managing  cookies and session?  Well, you might, but learn even more!
  • Ensure your app works the way you expect with automated browser testing using Jest and Puppeteer
  • Bonus – learn advanced JS techniques along the way, including where to use ES2015 proxies!

Node JS: beginners to Advanced Concepts I’ve built the course that I would have wanted to take when I was learning to Node. A course that explains the concepts and how they’re implemented in the best order for you to learn and deeply understand them.Who is the target audience?


  • Anyone who wants a deep mastery of Node
  • Engineers looking to understand the internals of Node
  • Programmers looking to improve Node’s performance

Created by Stephen Grider
Last updated 6/2019
English [Auto-generated]

Size: 1.76 GB

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