AngularJS Services by Jim Lavin

By Jim Lavin

Layout, construct, and attempt prone to create a origin on your AngularJS applications

About This Book

Understand how providers are a necessary part of the AngularJS framework and the way leveraging companies can gain your applicationDesign and constitution your AngularJS prone and study the easiest practices utilized in designing AngularJS servicesEffectively write, attempt, and at last set up your application

Who This publication Is For

If you're an intermediate JavaScript developer who's seeking to increase your realizing of single-page net software improvement with a spotlight on AngularJS providers, then this publication is for you.

What you'll Learn

Write Jasmine eventualities to check your AngularJS services
Implement universal performance that may be leveraged via the controllers, directives, and different prone on your application
Build companies that create, retrieve, replace, and delete your application's info on exterior servers
Incorporate third-party JavaScript libraries into your AngularJS application
Move company good judgment to the buyer aspect to construct a brand new type of serverless applications
Optimize your AngularJS program for max performance

In Detail

This booklet provide you with the talents and most sensible practices had to create AngularJS providers. It starts off with the basics of what companies are and their function in a standard AngularJS software. you are going to stroll in the course of the improvement of a real-world software utilizing prone around the a variety of software layers after which flow directly to create providers that offer cross-cutting matters comparable to messaging, logging, and authentication.

Next, the booklet covers companies that supply information entry displaying you the way to engage with exterior cloud-based information providers and the way to cache information at the purchaser to minimize community latency. The e-book then exhibits you ways to jot down prone that leverage different cloud-based prone to create mashups and contain performance on your program with no writing loads of code.

You also will find out how to create enterprise common sense gadgets, ideas engines, and finite kingdom machines, which are used to supply enterprise common sense in your software.

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Extra info for AngularJS Services

Example text

The publish/subscribe pattern is a messaging pattern that allows multiple consumers to subscribe and publish messages to other components without knowing the implementation details about those components. This lack of knowledge about the other components promotes loose coupling between the components and increases the maintainability of the application immensely. Subscribers to messages get notified when an event occurs related to the subscribed message. For long-running processes or AJAX requests, three messages are usually involved: one to invoke the process or request, another to indicate when the process or request completes, and a third to notify consumers of a failure.

To do this, you can use the inject method provided by the AngularJS Mocks library. The inject method allows you to define the dependencies you want to instantiate for use by the scenario. The inject method takes a function with a list of the services you want injected. The most common way of using the inject method is to define the services as variables in the scenario and then use a beforeEach function to inject them into the scenario and assign each service to a variable accessible to each specification in the scenario.

Finally, the service definition returns an object with just the methods we want to make public to consumers of the service, following the Revealing Module Pattern. [ 52 ] Chapter 4 To use the service, a consumer needs to include the messaging service as a dependency and then subscribe to one or more topics that it's interested in being notified about when the event occurs. password]); } //#endregion view handlers }); The LoginCtrl view controller takes the messaging service and the events service as dependencies.

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