AngularJS (Dependencies / Services)

Dependency

To use the functionality from one module inside another module.

Create your first module
Add your module inside your second module inside ['first_module']
If you did your first module in another file then import your file in your html

<script src="product.js"/>

Service

Give functionality like:

Fetching JSON data from a web service with $http
Logging messages to JS console with $log
Filtering an array with $filter
All built-in Services start with dollar sign $

Service $http

Make an async request to a server

$http( { method: 'GET' , url: '/products.json' } ) ;

Another way is

$http.get( '/products.json' , { apiKey: 'myApiKey' } ) ;

In both cases return a Promise object with .success() and .error()

In this image appear how to declare the services in a Controller

Then invoke our service

How to manipulate the result

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