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)

Two modules

In AngularJS 1.x, the ng-model directive was baked into the core framework. This is no longer the case. The @angular/core package doesn't contain a form-handling library. It only provides the key primitives we can use to build one.

Of course, making everyone to build their own would not be practical. And that's why the Angular team built the @angular/forms package with two modules: FormsModule and ReactiveFormsModule.

FormsModule implements AngularJS-style form handling. We create a form by placing directives in the template. We then use data bindings to get data in and out of that form.

ReactiveFormsModule is another take on handling input, where we define a form in the component class and just bind it to elements in the template. We tend to use reactive programming to get data in and out of the form, hence the name "reactive".

At first glance, these two modules seem very different...