A singleton service is a service for which only one instance exists in an app. In this tutorial, we will show how to create a singleton service in Angular when the service is in the root module, eagerly loaded module, or lazy loaded module.
The DI system in Angular uses tokens to uniquely identify a Provider. There are three types of tokens that you can create in Angular. They are Type Token, String Token, and Injection Token.
In this tutorial, we will look at how Angular dependency injection works. The Angular creates a hierarchical dependency injection system. It creates a hierarchical tree of Injectors. Each Injector gets their own copy of Angular Providers. Together these two form the core of the Angular dependency injection framework. We will learn how Angular creates the injector tree. How injector resolves the dependency.
How Dependency Injection & Resolution Works in Angular Read More »
We use Angular Decorators at many places in our Angular App. We use it to decorate components, directives, Angular Modules, etc. In this article, let us learn what is Angular Decorator and a list of Decorators that Angular Supports.
@Host decorator is one of the Resolution Modifiers in Angular. The Others are @Self, SkipSelf & Optional. These Decorators configures how the DI Framework resolves the dependencies. We already covered @Self, @SkipSelf & @Optional Decorators. In this tutorial, we will learn about @Host in detail.
