Book Image

Advanced Node.js Development

By : Andrew Mead
2 (1)
Book Image

Advanced Node.js Development

2 (1)
By: Andrew Mead

Overview of this book

Advanced Node.js Development is a practical, project-based book that provides you with all you need to progress as a Node.js developer. Node is a ubiquitous technology on the modern web, and an essential part of any web developer’s toolkit. If you're 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 was written around a single goal: turning you into a professional Node developer capable of developing, testing, and deploying real-world production applications. There's no better time to dive in. According to the 2018 Stack Overflow Survey, Node is in the top ten for back-end popularity and back-end salary. This book 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 delivers advanced skills that you need to become a professional Node developer. Along this journey you'll create your own API, you'll build a full real-time web app and create projects that apply the latest Async and Await technologies. Andrew Mead maps everything out for you in this book so that you can learn how to build powerful Node.js projects in a comprehensive, easy-to-follow package designed to get you up and running quickly.
Table of Contents (17 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
Index

Async/await basics


In this section, you're finally going to get to use the new async/await functionality. We're going to create an alternative version of the getStatus function and call it getStatusAlt, so we can go ahead and actually define that: a const getStatusAlt. Now, it's still going to be a function, so we're going to start off by creating an arrow function (=>). We're still going to take in an argument, so we'll define that userId:

const getStatusAlt = (userId) => {

};

Now, though, we're going to switch things up. Instead of working through the old example, we're going to use the new async/await functionality. To explore this, let's temporarily comment out the getStatus-then and catch block code. We'll be recreating it with a call to getStatusAlt as opposed to a call to getStatus, but I do want to leave the old code in place so we can directly compare and contrast the differences.

The new async/await functionality is going to allow us to write our old code in a way that looks...