There's something very important that we need to understand before proceeding. If we're a seasoned web developer we will most likely know about it already, however, since this book is for (almost) everyone, I feel like it's very important to deal with this matter as soon as possible.

This book will make an extensive use of a number of different programming tools, external components, third-party libraries and so on. Most of them, such as TypeScript, NuGet, NPM, Gulp, .NET Core Frameworks/runtimes, and so on are shipped together with Visual Studio 2017, while others such as Angular and its required JS dependencies will be fetched from their official repositories. These things are meant to work together in a 100% compatible fashion, however they are all subject to changes and updates during the inevitable course of time: as time passes by, the chance that these updates might affect the way they interact with each other and the project health will increase.