Read e-book online AngularJS Services PDF

By Jim Lavin

Layout, construct, and try providers to create a origin on your AngularJS applications

About This Book

Understand how companies are an essential component to the AngularJS framework and the way leveraging companies can gain your applicationDesign and constitution your AngularJS companies and examine the easiest practices utilized in designing AngularJS servicesEffectively write, try out, and eventually set up your application

Who This ebook 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 e-book 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 providers on your application
Build prone that create, retrieve, replace, and delete your application's facts on exterior servers
Incorporate third-party JavaScript libraries into your AngularJS application
Move company common sense to the buyer facet to construct a brand new classification of serverless applications
Optimize your AngularJS program for optimum performance

In Detail

This booklet offers you the abilities and most sensible practices had to create AngularJS providers. It starts off with the basics of what companies are and their position in a customary AngularJS software. you are going to stroll in the course of the improvement of a real-world software utilizing providers around the a number of program layers after which circulation directly to create companies that offer cross-cutting issues reminiscent of messaging, logging, and authentication.

Next, the booklet covers companies that supply information entry displaying you the way to have interaction with exterior cloud-based info providers and the way to cache info at the customer to minimize community latency. The ebook then exhibits you the way to write down companies that leverage different cloud-based companies to create mashups and comprise performance on your software with no writing loads of code.

You also will methods to create company good judgment gadgets, principles engines, and finite kingdom machines, which are used to supply company common sense to your program.

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Additional info for AngularJS Services

Example text

Servicename> and then only load the mock services you need. If you don't take this precaution, your service will be replaced with the mock instance, and all of your unit tests will fail. Mocking services with Jasmine spies If you notice, the preceding mock log_service doesn't do anything. This is because we can take advantage of Jasmine's spies to provide the services' behavior during the unit test. Jasmine's spies are pretty powerful. Not only can you replace the behavior of a service method, but you can also check to see if a service method was called, how many times it was called, and with what arguments it was called.

To test your AngularJS services using the Jasmine framework, there are two files you need to include in your Jasmine test-runner page or your Karma configuration. js. This file brings in the definitions that your code requires to run properly. js. This file provides mocks of several services that your tests can use to isolate the code under test. If your service depends on other JavaScript libraries, you'll need to include them as well. js file in this book's sample code, the files property defines an array of all of the files that need to be included for the tests to run properly.

Mocking services with Jasmine spies If you notice, the preceding mock log_service doesn't do anything. This is because we can take advantage of Jasmine's spies to provide the services' behavior during the unit test. Jasmine's spies are pretty powerful. Not only can you replace the behavior of a service method, but you can also check to see if a service method was called, how many times it was called, and with what arguments it was called. Another good thing about spies is that they only exist inside the describe or it functions where they were defined, allowing you to provide different behavior for the same method in each different unit test if needed.

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