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Learning Node.js Development
Learning Node.js Development

Learning Node.js Development: Learn the fundamentals of Node.js, and deploy and test Node.js applications on the web

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Learning Node.js Development

Node Fundamentals – Part 1

In this chapter, you'll learn a ton about building Node applications, and you'll actually build your first Node application. This is where all the really fun stuff is going to start.

We'll kick things off by learning about all of the modules that come built in to Node. These are objects and functions that let you do stuff with JavaScript you've never been able to do before. We'll learn how to do things, such as reading and writing from the filesystem, which we'll use in the Node's application to persist our data.

We'll also be looking at third-party npm modules; this is a big part of the reason that Node became so popular. The npm modules give you a great collection of third-party libraries you can use, and they also have really common problems. So you don't have to rewrite that boilerplate code over...

Module basics

In this section, you will finally learn some Node.js code, and we'll kick things off by talking about modules inside Node. Modules are units of functionality, so imagine I create a few functions that do something similar, such as a few functions that help with math problems, for example, add, subtract, and divide. I could bundle those up as a module, call it Andrew-math, and other people could take advantage of it.

Now, we'll not be looking at how to make our own module; in fact, we will be looking at how we can use modules, and that will be done using a function in Node, called require(). The require() function will let us do three things:

  • First, it'll let us load in modules that come bundled with Node.js. These include the HTTP module, which lets us make a web server, and the fs module, which lets us access the filesystem for our machine.
We will...

Require own files

In this section, you will learn how to use require() to load in other files that you created inside your project. This will let you move functions outside app.js into more specific files; this will make your application easier to scale, test, and update. To get started, the first thing we'll do is to make a new file.

Making a new file to load other files

In the context of our notes app, the new file will store various functions for writing and reading notes. As of now, you don't need to worry about that functionality, as we'll get into the detail later in the section, but we will create the file where it will eventually live. This file will be notes.js, and we'll save it inside the root...

Third-party modules

You now know two out of the three ways to use require(), and in this section, we'll explore the last way, which is to require a package you've installed from npm. As I mentioned in the first chapter, npm is a big part of what makes Node so fantastic. There is a huge community of developers that have created thousands of packages that already solve some of the most common problems in Node applications. We will be taking advantage of quite a few packages throughout the book.

Creating projects using npm modules

Now, in the npm packages, there's nothing magical, it's regular Node code that aims to solve a specific problem. The reason you'd want to use it is so you don't have to...

Global modules

One of the major complaints I get is the fact that students have to restart the app from the Terminal every time they want to see the changes they just made inside their text editor. So, in this section, we'll take a look at how we can automatically restart our app as we make changes to the file. That means if I change from Gary to Mike and save it, it will automatically restart over in the Terminal.

Installing the nodemon module

Now, to automatically restart our app as we make changes to a file, we have to install a command-line utility, and we'll do this using npm. To get started, we'll go to Google Chrome (or the browser you are using) and head over to https://www.npmjs.com, as we did previously...

Getting input

If a user wants to add a note, we need to know the note's title as well as the body of the note. If they want to fetch a note, we need to know the title of the note they want to fetch, and all this information needs to come into our app. And note apps, don't really do anything cool until they get this dynamic user input. This is what makes your scripts useful and awesome.

Now, throughout the book, we'll be creating note apps that get input from the user in a lot of different ways. We'll be using socket I/O to get real-time info from a web app, we'll be creating our own API so other websites and servers can make Ajax requests to our app, but in this section, we'll start things off with a very basic example of how to get user input.

We'll be getting input from the user inside the command line. That means when you run the app in the...

Summary

In this chapter, we learned how to use require to load in modules that come with Node.js. We created our files for our notes application and required them inside app.js. We explored how to use built-in modules and we explored how to use modules we defined. We found out how to require other files that we created, and how to export things such as properties and functions from those files.

We explored npm a little bit, how we can use npm init to generate a package.json file, and how we can install and use third-party modules. Next, we explored the nodemon module, using it to automatically restart our app as we make changes to a file. Last, we learned how to get input from the user, which is needed to create the notes application. We learned that we can use command-line arguments to pass data into our app.

In the next chapter, we'll explore some more interesting Node...

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Key benefits

  • • Entirely project-based and practical
  • • Explains the "Why" of Node.js features, not just the "how", providing you with a deep understanding and enabling you to easily apply concepts in your own applications
  • • Covers the full range of technologies around Node.js – NPM, version control with Git, and much more

Description

Learning Node.js Development is a practical, project-based book that provides you with all you need to get started as a Node.js developer. Node is a ubiquitous technology on the modern web, and an essential part of any web developers' toolkit. If you are looking to create real-world Node applications, or you want to switch careers or launch a side project to generate some extra income, then you're in the right place. This book has been written around a single goal—turning you into a professional Node developer capable of developing, testing, and deploying real-world production applications. Learning Node.js Development is built from the ground up around the latest version of Node.js (version 9.x.x). You'll be learning all the cutting-edge features available only in the latest software versions. This book cuts through the mass of information available around Node and delivers the essential skills that you need to become a Node developer. It takes you through creating complete apps and understanding how to build, deploy, and test your own Node apps. It maps out everything in a comprehensive, easy-to-follow package designed to get you up and running quickly.

Who is this book for?

This book targets anyone looking to launch their own Node applications, switch careers, or freelance as a Node developer. You should have a basic understanding of JavaScript in order to follow this course.

What you will learn

  • • Learn the fundamentals of Node
  • • Build apps that respond to user input
  • • Master working with servers
  • • Learn how to test and debug applications
  • • Deploy and update your apps in the real world
  • • Create responsive asynchronous web applications
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Publication date : Jan 31, 2018
Length: 658 pages
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Language : English
ISBN-13 : 9781788395540
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Length: 658 pages
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ISBN-13 : 9781788395540
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Table of Contents

12 Chapters
Getting Set Up Chevron down icon Chevron up icon
Node Fundamentals – Part 1 Chevron down icon Chevron up icon
Node Fundamentals – Part 2 Chevron down icon Chevron up icon
Node Fundamentals – Part 3 Chevron down icon Chevron up icon
Basics of Asynchronous Programming in Node.js Chevron down icon Chevron up icon
Callbacks in Asynchronous Programming Chevron down icon Chevron up icon
Promises in Asynchronous Programming Chevron down icon Chevron up icon
Web Servers in Node Chevron down icon Chevron up icon
Deploying Applications to Web Chevron down icon Chevron up icon
Testing the Node Applications – Part 1 Chevron down icon Chevron up icon
Testing the Node Applications – Part 2 Chevron down icon Chevron up icon
Another Book You May Enjoy Chevron down icon Chevron up icon

Customer reviews

Most Recent
Rating distribution
Full star icon Full star icon Full star icon Half star icon Empty star icon 3.6
(16 Ratings)
5 star 37.5%
4 star 18.8%
3 star 18.8%
2 star 12.5%
1 star 12.5%
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David Leonardo Galasso Jul 10, 2021
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Gives a fair knowledge to understand quicker the examples you will find on the net
Amazon Verified review Amazon
Frankie Jr. May 22, 2020
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
Bought this book as part of a Humble Bundle; great book for an introduction to Node.js and asynchronous programming with Node. If you're experienced at server-side/async programming in another language, this may be too slow for you. Otherwise, highly recommend it to novice Javascript developers. Couple gotchas:- Chapters regarding Google Geocode API and Dark Sky. Google API's require a key in the query (thus you need to register a key first now); Dark Sky has since been purchased by Apple and no longer exposes their API for free. Will have to substitute for another Open Weather API source.- Chapter regarding testing: text says to use version 2 of SuperTest but screenshot shows 3. (Time of review, version 4 is out).- Minor grammatical typos and errata. Example: text towards the end for the part with tests, when going through the code,says to require 'expect'; screenshot shows 'express' declared twice. Portion of the text previous to this section says "...at the time of filming"... I think you mean "writing." Handful of small grammar misses. (whatever.)None of these should detract you if new to Node.js/Javascript.
Amazon Verified review Amazon
Hadi Farhat Apr 25, 2020
Full star icon Full star icon Empty star icon Empty star icon Empty star icon 2
Rubbish. You think you're getting 650 pages worth of useful content? About half of these pages are full-sized pictures of console outputs. Two stars cause it can still be a little bit useful for beginners. You'll still learn something from this book. But don't be fooled by the page count!
Amazon Verified review Amazon
Chris Dec 24, 2019
Full star icon Full star icon Full star icon Full star icon Full star icon 5
So far in my reading Great Book. Informative breaking down the language to where you truly understand the essence of the philosophy behind it. Mead is a great instructor also,I've took so of his Use my courses also simply excellent.
Amazon Verified review Amazon
Phillip B. Nov 05, 2019
Full star icon Empty star icon Empty star icon Empty star icon Empty star icon 1
This book could've been easily compressed into like a 12-page pamphlet. Teaches you NO real-world examples... and includes like 300 pictures of the console output - as well as repeating things to death.Avoid at all costs.
Amazon Verified review Amazon
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