Book Image

Learning Node.js Development

By : Andrew Mead
Book Image

Learning Node.js Development

By: Andrew Mead

Overview of this book

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.
Table of Contents (13 chapters)

Abstracting callbacks

In this section, we'll be refactoring app.js, taking a lot of the complex logic related to geocoding and moving it into a separate file. Currently, all of the logic for making the request and determining whether or not the request succeeded, our if else statements, live inside of app.js:

url: `${encodedAddress}`,
json: true
}, (error, response, body) => {
if (error) {
console.log('Unable to connect Google servers.');
} else if (body.status === 'ZERO_RESULTS') {
console.log('Unable to find that address.');
} else if (body.status === 'OK') {
console.log(`Address: ${body.results[0].formatted_address}`);
console.log(`Latitude: ${body.results[0]}`);
console.log(`Longitude: ${body.results[0].geometry.location...