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)

Angular templates

Templates can be analyzable, transformable, and declarative in a way that JavaScript fundamentally cannot be. When designing Angular we put a lot of effort to make sure the template language has these properties. Let's look at what we ended up with.

Property and event bindings

Input and output properties are the public API of a directive. Data flows into a directive via its inputs and flows out via its outputs. We can update input properties using property bindings. And we can subscribe to output properties using event bindings.

Say we have a component that renders a button that allows rating a conference talk. We could use this component in our template as follows:

<rate-button [talk]="myTalk" (rate)="handleRate($event)&quot...