Alex Knol - Dependency Injection with AngularJS
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Dependency Injection with AngularJS: summary, description and annotation
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Design, control, and manage your dependencies with AngularJS dependency injection
Overview
- Understand the concept of dependency injection
- Isolate units of code during testing JavaScript using Jasmine
- Create reusable components in AngularJS
In Detail
Dependency injection facilitates better testing by allowing us to mock dependencies in testing environments so that we only test one thing at a time. It also enables us to write more maintainable code by decoupling our objects from their implementations. The motivation for using it in AngularJS is to make it easier to transparently load mocked objects in tests.
This book is a practical manual to get you started on dependency injection. It will also take you along the road to creating testable and reusable code. Ensuring productivity and stability are the two most important things that you will learn.
Dependency Injection with AngularJS will introduce you to AngularJS using a simple sample project. By portraying different ways of developing code modules, it will show you the advantages of dependency injection. This will lead to the ability to create reusable components that can easily be tested.
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Copyright 2013 Packt Publishing
All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.
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Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.
First published: December 2013
Production Reference: 1111213
Published by Packt Publishing Ltd.
Livery Place
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Birmingham B3 2PB, UK.
ISBN 978-1-78216-656-6
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Cover Image by Abhishek Pandey (<>)
Author
Alex Knol
Reviewers
Iwan van Staveren
Ruoyu Sun
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Cover Work
Kyle Albuquerque
Alex Knol is a lifelong tech geek with a passion for automation. After spending some years away from software development, around the beginning of this century, he took up PHP development based on his early experiences with C and Pascal. Surprisingly, he has never really used web tools, but applications instead, to make websites, such as the platform that's driving kaizegine.com. Having built various applications using web technologies and frameworks, such as Symfony, he discovered AngularJS at the beginning of 2008, while searching for a way to structure frontend application code and make development easy. He used AngularJS, among other technologies, for a job-matching project in the Netherlands and, more recently, for an online website designer named Risingtool.com.
I'd like to thank the AngularJS team for continuously improving the framework and documentation; my employer, Risingtool.com, for allowing me to work on this book, partly on their time. This book also took time away from my family time, for which I'd like to thank my wife and children.
Iwan van Staveren is a software architect. He has over 14 years of experience in developing all kinds of web applications. He loves working with the Symfony2 and AngularJs frameworks. He is owner of the privately-owned E-one Software.
Ruoyu Sun is a designer and developer living in Hong Kong. He is passionate about programming and has been contributing to several open source projects. He has founded several tech startups, using a variety of technologies, before going into the IT industry. He is the author of the book Designing for XOOPS , O'Reilly Media , July 2011 .
I would like to thank all my friends and family who have always supported me.
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Dependency Injection is a term often used in the world of object-oriented software design. AngularJS depends on it at its core. This book teaches you why and how to use Dependency Injection with AngularJS.
, Learning to Fly , will take you through the basics of an Angular application. This chapter prepares a sample app that will be used throughout the examples in the book.
, Better Code , takes you from bad coding practices to maintainable and testable software using Dependency Injection. It also shows you the theory of Dependency Injection and some of its positive effects.
, The Magic , is a technical explanation of how Dependency Injection can be used with AngularJS and the caveats to watch out for.
, Testing , is a chapter that will show you the advantages that Dependency Injection brings when testing your application. Integration testing and unit testing are covered. The set up and use of recommended AngularJS testing frameworks are covered as well.
, Large Applications , will show you ways to implement the theory and techniques used in large applications. The result will be less code and better maintainability.
To play along with the examples in this book, you just need a working installation of NodeJS and a text editor. To view the output, a web browser is required.
If you are a developer or software engineer, this book is ideal for you. You should have a basic understanding of JavaScript and web development.
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