Book Image

Learning Angular for .NET Developers

By : Rajesh Gunasundaram
Book Image

Learning Angular for .NET Developers

By: Rajesh Gunasundaram

Overview of this book

Are you are looking for a better, more efficient, and more powerful way of building front-end web applications? Well, look no further, you have come to the right place! This book comprehensively integrates Angular version 4 into your tool belt, then runs you through all the new options you now have on hand for your web apps without bogging you down. The frameworks, tools, and libraries mentioned here will make your work productive and minimize the friction usually associated with building server-side web applications. Starting off with building blocks of Angular version 4, we gradually move into integrating TypeScript and ES6. You will get confident in building single page applications and using Angular for prototyping components. You will then move on to building web services and full-stack web application using ASP.NET WebAPI. Finally, you will learn the development process focused on rapid delivery and testability for all application layers.
Table of Contents (16 chapters)
Title Page
About the Author
About the Reviewers
Customer Feedback

Decorators and metadata

As you saw in the last section, we define JavaScript plain classes for a component, and we annotate it with some information to inform the Angular framework that this class is a component.

We leverage the Typescript syntax and attach the classes with metadata using the decorator feature. To make a class as a component, we add the @Component decorator, as shown in the following code:

export class FirstComponent {...}

As you can see, the code snippet shows that the FirstComponent class has been decorated as a component.

Now, let's attach metadata to the FirstComponent class using the decorator syntax:

   selector: 'first-component', 
   templateUrl: 'app/first.component.html' 
export class FirstComponent {...} 

Here, we have added metadata, such as a selector and templateUrl. The selector metadata configured in the component tells Angular to create the instance of a component when it encounters the <first-controller> markup: