Book Image

Angular Services

By : Sohail Salehi
Book Image

Angular Services

By: Sohail Salehi

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

Updating the navigation system

So far we have created one root component, three components for the wire-frames, and one component for navigation system. Now it is the right time to take hard coded values out of the root template and replace them with actual routes. We are going to put the Android router module in charge of updating the view based on the selected menu item.

Before changing anything, click on any link in the navigation bar and notice the "loading..." message. The current <a href="#"> in each menu item, refreshes the whole page and completely reloads index.html every time. This is not ideal. The goal is to update a specific area of the index page with the view of a component associated with the menu item.


Applications that update only a specific part of a screen are called SPA (Single Page Application) and they are very efficient in terms of reducing loading time. All page contents will be loaded and cached once and later requesting any page will be done in the background...