Angular Module and Component Exports: Building Reusable Elements

Angular applications thrive on modularity and reusability. This challenge focuses on correctly exporting components, services, and other artifacts from Angular modules, enabling you to build well-organized and maintainable applications. You'll be creating a simple module and exporting its components and services to be used in a parent application.

Problem Description

You are tasked with creating a new Angular module named FeatureModule that encapsulates a simple component (FeatureComponent) and a service (FeatureService). The goal is to properly export these elements from FeatureModule so they can be imported and utilized by other modules within a larger Angular application. Incorrect exports will result in errors when attempting to use the component or service from another module.

What needs to be achieved:

1. Create a new Angular module named FeatureModule.
2. Within FeatureModule, create a simple component named FeatureComponent that displays a message.
3. Within FeatureModule, create a simple service named FeatureService that provides a greeting message.
4. Export FeatureComponent and FeatureService from FeatureModule.

Key Requirements:

• The FeatureModule must be a standalone module.
• The FeatureComponent should display the message "Hello from FeatureModule!".
• The FeatureService should have a method getGreeting() that returns the string "Greetings from FeatureService!".
• The exported component and service must be accessible and usable from another Angular module.

Expected Behavior:

When another module imports FeatureModule and attempts to use FeatureComponent or FeatureService, it should be able to successfully instantiate and utilize them without errors. The component should render the expected message, and the service method should return the expected greeting.

Edge Cases to Consider:

• Forgetting to export a component or service.
• Incorrectly exporting a private member.
• Using the wrong export syntax.

Examples

Example 1:

Input:  A parent module imports FeatureModule and uses FeatureComponent in a template.
Output: The FeatureComponent renders "Hello from FeatureModule!" in the parent module's template.
Explanation:  FeatureModule is correctly imported and FeatureComponent is successfully rendered.

Example 2:

Input: A parent module imports FeatureModule and injects FeatureService into a component.
Output: The parent component can call FeatureService.getGreeting() and receive "Greetings from FeatureService!".
Explanation: FeatureModule is correctly imported, FeatureService is successfully injected, and the service method is called.

Constraints

• The solution must be written in TypeScript.
• The solution must use Angular 16 or later.
• The FeatureComponent should be a simple template-driven component.
• The FeatureService should be a basic service with a single method.
• The solution should be well-formatted and easy to understand.

Notes

• Remember that Angular modules are containers for components, services, and other artifacts.
• The exports array in the @NgModule decorator is crucial for making these artifacts available to other modules.
• Standalone modules are the recommended approach for new Angular projects. Ensure your module is configured as standalone.
• Consider using the forwardRef function if you need to export a component that depends on itself. (Not required for this specific problem, but good to know).