Angular viewProviders: Scoped Dependency Injection
viewProviders in Angular:
Definition:
The "viewProviders" attribute is a property that can be used when defining a component in Angular. It specifies the set of injectable objects that are visible to the view's DOM children of that component.
Syntax:
The basic syntax for using "viewProviders" is to add the property to the @Component decorator of an Angular component. The "viewProviders" property takes an array of objects of type "Provider".
Provider Object:
A "Provider" object is used to configure dependency injection in Angular. It can be a class, a token, or a constant value.
Usage Example:
Let's consider a practical example to understand how "viewProviders" can be used. Suppose you have a service, "MyService", that you want to inject only within the scope of the view of the component.
When to Use:
Use "viewProviders" when you want to provide a specific service only to the child components and directives of the current component.
This is useful when you have a service that should have a different instance for each instance of the parent component.
Summary:
"viewProviders" in Angular allows you to configure dependency injection for the child components and directives of a specific component. It is useful when you need a service to be visible only to the children of a component, creating a different instance of that service for each instance of the parent component. This helps control the scope of dependency injection and share or isolate specific functionalities in different parts of your Angular application.
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