Building for Flexibility: A Guide to Creating Reusable Components in Angular Introduction Creating reusable components is an essential part of building scalable and maintainable applications. In Angular, building reusable components is a straightforward process that allows developers to minimize duplication and maximize code reuse. Problems Code Duplication: When building an application without resuable components, it's common to end up duplicating code across different parts of the application. This not only makes the codebase larger and harder to maintain, but it also increases the likelihood of errors and bugs. Inconsistency: Without reusable components, it can be challenging to ensure consistency across the application. This can lead to user confusion and a poor user experience. Time-Consuming: Writing and maintaining non-reusable components can be a time-consuming process. This can lead to longer development cycles, which can delay the release of new features and updates. Limited Reusability: Components that are not designed to be reusable or generic are often tightly coupled to a specific part of the application. This can limit their reusability and make it more difficult to scale the application in the future. Solution By creating reusable components, we can address these problems and build applications that are more scalable, maintainable, efficient, and developers can streamline their development process and improve application performance.

1. Delete Engine
Module
Root App
Module
Car
Component
Car Store
Component
Car Warehouse
Component
Car API
Service
Car Store
API Service
Car Warehouse
API Service
Delete
Engine Service
Delete
Engine Component
Delete
Engine Component
Delete
Engine Component
• First, we will create a Delete
Engine Module
• Then we will import it into the
Root App Module

2. Delete Engine
Module
Root App
Module
Car
Component
Car Store
Component
Car Warehouse
Component
Car API
Service
Car Store
API Service
Car Warehouse
API Service
Delete
Engine Service
Delete
Engine Component
Delete
Engine Component
Delete
Engine Component
• The next step is to create three
different classes of API Service
a. Car API Service
b. Car Store API Service
c. Car Warehouse API Service

3. Delete Engine
Module
Root App
Module
Car
Component
Car Store
Component
Car Warehouse
Component
Car API
Service
Car Store
API Service
Car Warehouse
API Service
Delete
Engine Service
Delete
Engine Component
Delete
Engine Component
Delete
Engine Component
• Ensure the three API Service
classes are extended to the Delete
Engine Service class
• The Delete Engine Service class
serves as the generic API Service
provider or wrapper of any API
Resource Service class that can be
used in any component that needs
a deletion of a resource

4. Delete Engine
Module
Root App
Module
Car
Component
Car Store
Component
Car Warehouse
Component
Car API
Service
Car Store
API Service
Car Warehouse
API Service
Delete
Engine Service
Delete
Engine Component
Delete
Engine Component
Delete
Engine Component
• The next step is to provide the
Delete Engine Service class in the
following components
a. Car Component
b. Car Store Component
c. Car Warehouse Component

5. Delete Engine
Module
Root App
Module
Car
Component
Car Store
Component
Car Warehouse
Component
Car API
Service
Car Store
API Service
Car Warehouse
API Service
Delete
Engine Service
Delete
Engine Component
Delete
Engine Component
Delete
Engine Component
• We will provide the Car API
Service class directly to Car
Component. Why? We don't want
to expose this Car API Service in
other places that do not need this!
• Next is to provide the Delete
Engine Service class as a "View
Provider" of the source
component and then use the
existing API Service, which is the
Car API Service class

6. Delete Engine
Module
Root App
Module
Car
Component
Car Store
Component
Car Warehouse
Component
Car API
Service
Car Store
API Service
Car Warehouse
API Service
Delete
Engine Service
Delete
Engine Component
Delete
Engine Component
Delete
Engine Component
• The Delete Engine Service was
provided as a "View Provider"
because we want to share this
service with the child or view
component(s) of the source
component
• The Delete Engine Component
uses the Delete Engine Service
class to invoke the delete method

7. Delete Engine
Module
Root App
Module
Car
Component
Car Store
Component
Car Warehouse
Component
Car API
Service
Car Store
API Service
Car Warehouse
API Service
Delete
Engine Service
Delete
Engine Component
Delete
Engine Component
Delete
Engine Component
• This is the full structure of how we
build for flexibility in Angular by
using a reusable component