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
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Chapter 3.  The Collector Service - Using Controllers to Collect Data

In this chapter, we are going to take the Collector component to the next level and add some business logic to it. As we saw earlier in the preceding chapter, components are simple TypeScript classes with properties and methods. Each component has a view and can communicate with that view in any directions:

  • From component to template

  • From template to component

  • Or simultaneously in both directions

The properties in a component class are basically data holders for a view and the methods implement what views intend to do (the behavior of the view). These methods are mostly triggered by the template events. However, there are scenarios where a story happens outside of the component/template relationship. Lets find out more about it.

The main topics of this chapter are:

  • Services and how they are beneficial to our project

  • Dependency injection framework

  • Various types of bindings in Angular

  • Firebase Realtime database