Anil Singh | Code-sample.com

What Is Injector tree? In the Dependency Injection guide, you learned how to configure a dependency injector and how to retrieve dependencies where you need them. An application may have multiple injectors. An Angular application is a tree of components. Each component instance has its own injector. The tree of components parallels the tree of injectors. Three level component tree –  What Is Injector bubbling? Explore in detail by using below questions - 1.        What Is an entryComponents? 2.        What Are @Injectable providers? 3.        What Is Dependency Injection (DI)? I hope enjoy this post. Thank you very much reading this post.

What Is Injectors? A service is just a class in Angular until you register with an Angular dependency injector. The injector is responsible for creating angular service instances and injecting them into classes. You rarely create an injector yourself and Angular creates automatically during the bootstrap process. Angular doesn't know automatically how you want to create instances of your services or injector. You must configure it by specifying providers for every service. Actually, providers tell the injector how to create the service and without a provider not able to create the service. Bootstrap defines the components that should be bootstrapped when this module is bootstrapped. The components listed here will automatically be added to entryComponents. Explore in detail by using below questions - 1.       What Is an entryComponents? 2.       What Are @Injectable providers? 3.       ...

What Is a Dependency? When module X in an application needs module Y to run, then module Y is a dependency of module X.   What Is Dependency Injection (DI)? Dependency Injection is a powerful pattern for managing code dependencies. DI is a way to create objects that depend upon other objects. Angular has its own DI framework pattern, and you really can't build an Angular application without Dependency injection (DI). A DI system supplies the dependent objects when it creates an instance of an object. Let us take an example of a CAR. The CAR consists of following things - 1.       Wheel 2.       Headlight 3.       Outer door 4.       Inner door 5.       Glass 6.       Window 7.       Fuel level sensor So to complete the CAR, we need those eight and so many things. In this...