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Learning Node.js Development

You're reading from   Learning Node.js Development Learn the fundamentals of Node.js, and deploy and test Node.js applications on the web

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Product type Paperback
Published in Jan 2018
Publisher Packt
ISBN-13 9781788395540
Length 658 pages
Edition 1st Edition
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Author (1):
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Andrew Mead Andrew Mead
Author Profile Icon Andrew Mead
Andrew Mead
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Table of Contents (13) Chapters Close

Preface 1. Getting Set Up 2. Node Fundamentals – Part 1 FREE CHAPTER 3. Node Fundamentals – Part 2 4. Node Fundamentals – Part 3 5. Basics of Asynchronous Programming in Node.js 6. Callbacks in Asynchronous Programming 7. Promises in Asynchronous Programming 8. Web Servers in Node 9. Deploying Applications to Web 10. Testing the Node Applications – Part 1 11. Testing the Node Applications – Part 2 12. Another Book You May Enjoy

The basic concept of asynchronous program

In this section, we're going to create our first asynchronous non-blocking program. This means our app will continue to run while it waits for something else to happen. In this section, we'll look at a basic example; however, in the chapter, we'll be building out a weather app that communicates with third-party APIs, such as the Google API and a weather API. We'll need to use asynchronous code to fetch data from these sources.

For this, all we need to do is make a new folder on the desktop for this chapter. I'll navigate onto my desktop and use mkdir to make a new directory, and I'll call this one weather-app. All I need to do is navigate into the weather app:

Now, I'll use the clear command to clear the Terminal output.

Now, we can open up that new weather app directory inside of Atom:

This is the...

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