Download Dependency Injection with AngularJS by Alex Knol PDF

By Alex Knol

ISBN-10: 1782166564

ISBN-13: 9781782166566

Layout, regulate, and deal with your dependencies with AngularJS dependency injection

Overview
Understand the idea that of dependency injection Isolate devices of code in the course of trying out JavaScript utilizing Jasmine Create reusable elements in AngularJS
In Detail

Dependency injection allows greater checking out via permitting us to mock dependencies in trying out environments in order that we merely try something at a time. It additionally allows us to jot down extra maintainable code by means of decoupling our gadgets from their implementations. the inducement for utilizing it in AngularJS is to aid you transparently load mocked gadgets in tests.

This booklet is a realistic guide to get you all started on dependency injection. it is going to additionally take you alongside the line to making testable and reusable code. making sure productiveness and balance are the 2 most crucial issues that you'll learn.

"Dependency Injection with AngularJS" will introduce you to AngularJS utilizing an easy pattern undertaking. via portraying other ways of constructing code modules, it's going to express you some great benefits of dependency injection. this can result in the facility to create reusable parts which could simply be proven.

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Extra resources for Dependency Injection with AngularJS

Sample text

Creating our service inside a new module means our tempApp has no knowledge of our service yet. It means we need to inject this new module in our application. module('tempApp', ['serviceModule']). when('/current', {templateUrl: 'partials/current. html', controller: 'CurrentCtrl'}); ... info Better Code Let's take our new serviceModule one step further and extend it with a second service on top of our generic Parse service that will use the Parse instance to expose methods for query and save. This allows us to take some more code out of our controllers.

Open/closed principle: This principle states that code should be designed in such a way that they are open to extension but closed for modifications. Code written in this way will never change unless there is a bug in it. This means that everything that depends on the code will always understand it, and tests written for it will not have to be changed either because they keep passing. • Liskov's principle: This principle reminds us of something that should already be a common practice for any object-oriented developer: subclasses should be behaviorally compatible with their superclass.

Git. This basic project contains most of the elements that we have discussed so far in this book. There is some sample code that uses routes, controllers, service, directive, and a filter. All of the code has accompanying tests, and testing has been set up with Karma and Jasmine. Although the Angular team themselves have titled the repository as a basic skeleton, many people find the setup sufficient for sizable applications that have lengths of up to several hundred lines of code.

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