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
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

Directives


We walked through the Angular component and the way it is decorated. The @Component itself is a directive with a template configured in the metadata. So, a directive is a component without a template, and @directive is used in Typescript to attach metadata to it.

Structural directives

Structural directives deal with modifying elements in the DOM by adding new elements, removing existing elements, and replacing existing elements with new elements. The following markup shows two structural directives: *ngFor and *ngIf:

<div *ngFor="#todo of todos"></div> 
<todo-item *ngIf="selectedTodo"></todo-item> 

*ngFor iterates through each item in the todos collection and adds a div tag for each item. And *ngIf renders <todo-item> only if selectedTodo is available.

Attribute directives

An attribute directive will be added like an attribute to existing HTML elements, and this can alter or extend the behavior of HTML elements. For example, an ngModel directive, if added...