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

That's how Angular templates work. Let's see if they are analyzable and transformable, and if they provide the benefits I talked about at the beginning of this chapter.

Contrasting with Angular 1, there is a lot more the framework can tell about the template statically.

For example, regardless of what the component element is, Angular knows that name in [property1]="name" is a field read and name in property2="name" is a string literal. It also knows that the name property cannot be updated by the component: property bindings update from the parent to the child. Similarly, Angular can tell what variables are defined in the template by just looking at *ngFor. Finally, it can tell apart the static and dynamic parts in the template.

All of these allow us to reliably introspect and transform templates at compile time. That's a powerful feature, that, for instance,...