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

Introducing node-cron

Since we don't want to reinvent the wheel, we can benefit from a very useful node package called node-cron, which delivers exactly what we are looking for. Simply install the package by running the following command:

$ npm install node-cron --save

Normally we want to install the typings that are shipped with every node package. But not every node package is designed to be used inside TypeScript classes. Some of them, including node-cron, are plain JavaScript files. To prove that, try the following command:

$ typings install node-cron --save

As you can see, in the error message we can discover two facts:

typings ERR! message Unable to find "node-cron" ("npm") in the registry.
typings ERR! message We could use your help adding these typings to the registry:   

The first line indicates that node-cron doesn't provide any typings. The second error message denotes that there is a typings registry for all node packages and if you are...