Angular Component Declarations Challenge

Angular components need to be declared within a module to be used in your application. This challenge focuses on correctly declaring a component within an Angular module, ensuring it's available for use in templates and other components. Understanding declarations is fundamental to building modular and maintainable Angular applications.

Problem Description

You are tasked with creating an Angular module and declaring a simple component within it. The component, named MyComponent, will have a template that displays the text "Hello from MyComponent!". You need to ensure that MyComponent is properly declared in the AppModule so that it can be used in the root component's template.

What needs to be achieved:

1. Create a new Angular component named MyComponent with a simple template.
2. Declare MyComponent within the AppModule of an existing Angular project.
3. Use MyComponent in the template of the root component (AppComponent).

Key Requirements:

• The MyComponent template must display "Hello from MyComponent!".
• The AppModule must import MyComponent and add it to the declarations array.
• The AppComponent template must include <app-my-component></app-my-component>.

Expected Behavior:

When the application runs, the browser should display "Hello from MyComponent!" within the AppComponent template. If the component is not declared correctly, an error will occur indicating that MyComponent is not registered.

Edge Cases to Consider:

• Ensure the component is imported correctly into the module.
• Verify that the component's selector (app-my-component) is used correctly in the template.
• Check for typos in the component name or selector.

Examples

Example 1:

Input: An Angular project with an existing AppModule and AppComponent.
Output: The application displays "Hello from MyComponent!" in the browser.
Explanation: MyComponent is correctly declared in AppModule and used in AppComponent's template.

Example 2:

Input: An Angular project where MyComponent is not declared in AppModule.
Output: An error message in the browser console indicating that MyComponent is not registered.
Explanation: The application fails to load because the component is not declared.

Constraints

• You must use TypeScript.
• The solution should be compatible with a standard Angular project setup (Angular CLI generated project).
• The solution should be concise and follow Angular best practices.
• The component should be declared in the AppModule.

Notes

• You can use the Angular CLI to generate the component initially (ng generate component my-component).
• Focus on the declaration aspect within the module. The component's template is relatively simple.
• Consider the import statements required to make the component available to the module.
• This challenge tests your understanding of Angular's module system and component declaration process.