The main idea behind the dependency injection pattern is the dependencies of a component being provided as input by an external entity. Such an entity can be a client component or a global container, which centralizes the wiring of all the modules of the system. The main advantage of this approach is an improved decoupling, especially for modules depending on stateful instances. Using DI, each dependency, instead of being hardcoded into the module, is received from the outside. This means that the module can be configured to use any dependency and therefore can be reused in different contexts.
