Book Image

Angular Services

Book Image

Angular Services

Overview of this book

A primary concern with modern day applications is that they need to be dynamic, and for that, data access from the server side, data authentication, and security are very important. Angular leverages its services to create such state-of-the-art dynamic applications. This book will help you create and design customized services, integrate them into your applications, import third-party plugins, and make your apps perform better and faster. This book starts with a basic rundown on how you can create your own Angular development environment compatible with v2 and v4. You will then use Bootstrap and Angular UI components to create pages. You will also understand how to use controllers to collect data and populate them into NG UIs. Later, you will then create a rating service to evaluate entries and assign a score to them. Next, you will create "cron jobs" in NG. We will then create a crawler service to find all relevant resources regarding a selected headline and generate reports on it. Finally, you will create a service to manage accuracy and provide feedback about troubled areas in the app created. This book is up to date for the 2.4 release and is compatible with the 4.0 release as well, and it does not have any code based on the beta or release candidates.
Table of Contents (15 chapters)
Angular Services
About the Author
About the Reviewer
Customer Feedback

Property binding

We saw the easiest form of property binding through interpolation before. But it is better to use interpolation if you want to show a message between HTML tags. In order to edit the properties of a DOM element, we use different syntax as follows:


For example, in the following DOM element:

  <input type="email" [placeholder]="emailPlaceHolder" > 

The square brackets indicate that we are binding the <input> placeholder property to the emailPlaceHolder property defined somewhere in a component class:

// some component class 
export class EmailComponent { 
  emailPlaceHolder = "please enter your email"; 

We can apply similar syntax to bind to a CSS class or even a CSS style.