Node.js, MongoDB, and AngularJS Web Development

Dependency Injection

Dependency injection can be a difficult concept to fully grasp. However, once you understand the basics, the AngularJS implementation becomes quite clear. Dependency injection is a well-known design pattern in many server-side languages but has not been used much in JavaScript before now.

The idea of AngularJS dependency injection is to define and dynamically inject a dependency object into another object, making available all the functionality provided by the dependency object. AngularJS provides dependency injection through the use of providers and an injector service.

A provider is essentially a definition of how to create an instance of an object with all the necessary functionality. Providers should be defined as part ...