Differences between AngularJS module() method and $provide.provider() method

Disclaimer: I am not inquiring about the distinctions between the value, factory, service, and provider 'recipes' as detailed here.

I am seeking clarification on the different methods of defining them. It seems that

myApp = angular.module('myApp', [])
    .value(...)
    .factory(...)
    .service(...)
    .provider(...)

equates to

$provide.value()
$provide.factory()
$provide.service()
$provide.provider()

And both ways are valid. As seen from this question, I have realized you can use $provide as a dependency for module().config(). My inquiries are:

  1. When/why should I utilize angular.module().provider() instead of using the $provide dependency?
  2. Is there any method (or reason) to access/change a provider after it has been defined?
  3. While inspecting the various angular $scope properties with AngularJS Batarang for Chrome, I cannot locate $provide or $injector. Where can these be found?

Answer №1

  1. In the realm of module definitions, provider methods serve as convenient shortcuts to streamline your code and make it more readable. Utilizing these shortcuts is encouraged to avoid the hassle of injecting the $provider service directly. However, there are instances where accessing a method on $provide directly becomes necessary, especially when dealing with situations that go beyond the module definition level.

  2. One common scenario where altering a provider after its initial definition is essential is when integrating third-party components into your application. By overriding or extending the behavior of the third-party service, you can tailor it to fit the specific requirements of your app. A typical example would be customizing the built-in Angular exception handler to seamlessly interact with your own components.

  3. It's important to note that $scope acts as a crucial binding agent for data-binding, exposing only properties and functions explicitly set within it. While other modules and services reside in Angular's dependency injection container, $injector plays a pivotal role in managing dependencies from the get-go. Remember, any service prefixed with a $ is conventionally placed by Angular in the $injector for easy access.

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