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)

Callback functions and APIs

In this section, we'll take an in-depth look at callback functions, and use them to fetch some data from a Google Geolocation API. That's going to be the API that takes an address and returns the latitude and longitude coordinates, and this is going to be great for the weather app. This is because the weather API we use requires those coordinates and it returns the real-time weather data, such as the temperature, five-day forecast, wind speed, humidity, and other pieces of weather information.

The callback function

Before we get started making the HTTPS request, let's talk about callback functions, and we have already used them. Refer to the following code (we used it in the previous...