Book Image

Essential Angular

By : Victor Savkin, Jeff Cross
Book Image

Essential Angular

By: Victor Savkin, Jeff Cross

Overview of this book

Essential Angular is a concise, complete overview of the key aspects of Angular, written by two Angular core contributors. The book covers the framework's mental model, its API, and the design principles behind it. This book is fully up to date with the latest release of Angular. Essential Angular gives you a strong foundation in the core Angular technology. It will help you put all the concepts into the right places so you will have a good understanding of why the framework is the way it is. Read this book after you have toyed around with the framework, but before you embark on writing your first serious Angular application. This book covers concepts such as the differences between Just-In-Time (JIT) and Ahead-Of-Time (AOT) compilation in Angular, alongside NgModules, components and directives. It also goes into detail on Dependency Injection and Change Detection: essential skills for Angular developers to master. The book finishes with a look at testing, and how to integrate different testing methodologies in your Angular code.
Table of Contents (11 chapters)

Let's recap

What I have listed constitutes a component.

  • A component knows how to interact with its host element
  • A component knows how to interact with its content and view children
  • A component knows how to render itself
  • A component configures dependency injection
  • A component has a well-defined public API of input and output properties

All of these make components in Angular self-describing, so they contain all the information needed to instantiate them. And this is extremely important.

This means that any component can be bootstrapped. It does not have to be special in any way. Moreover, any component can be loaded into a router outlet. As a result, you can write a component that can be bootstrapped as an application, loaded as a route, or used in some other component directly. This results in less API to learn. And it also makes components more reusable.