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

The relationship between ECMAScript, AtScript, and TypeScript

The current edition of ECMAScript (ES5) is the one that is widely accepted among all well-known browsers. You can think of it as the traditional JavaScript; whatever code is written in ES5 can be executed directly in the browsers. The problem is that most modern JavaScript frameworks contain features that require more than the traditional JavaScript capabilities. That is the reason ES6 was introduced. With this edition, and any future ECMAScript editions, we will be able to empower JavaScript with the features we need.

Now, the challenge is in running the new code in the current browsers. Most browsers nowadays recognize standard JavaScript codes only. So, we need a mediator to transform ES6 to ES5. That mediator is called a transpiler and the technical term for transformations is transpiling. There are many good transpilers out there and you are free to choose whatever you feel comfortable with.


Apart from TypeScript, you might want to consider Babel ( as your main transpiler.

Google originally planned to use AtScript to implement Angular; later they joined forces with Microsoft and introduced TypeScript as the official transpiler for Angular.

The following figure summarizes the relationship between various editions of ECMAScript, AtScript, and TypeScript.


For more details about JavaScript, ECMAScript, and how they evolved during the past decade, visit