Implementing Lazy Loading for Angular Components

Lazy loading is a crucial optimization technique for Angular applications, especially those with a large number of components or modules. It involves loading components and modules only when they are needed, rather than loading everything upfront, which significantly improves initial load time and overall application performance. This challenge asks you to implement a basic lazy loading strategy for a set of Angular components.

Problem Description

You are tasked with creating a simple Angular module that demonstrates lazy loading of components. The module, named LazyLoadedModule, should contain three components: ComponentA, ComponentB, and ComponentC. Initially, none of these components should be loaded when the main application starts. When a specific button in the main application is clicked, the LazyLoadedModule should be loaded, and a corresponding message should be displayed indicating that the module has been loaded. The components themselves don't need complex logic; their mere presence and successful loading are the key indicators of success.

Key Requirements:

• Lazy Loading: The LazyLoadedModule should be loaded only when explicitly requested.
• Module Structure: Create a separate Angular module (LazyLoadedModule) containing the three components.
• Trigger Mechanism: Implement a button in the main application that, when clicked, triggers the lazy loading of LazyLoadedModule.
• Confirmation Message: Display a message in the main application confirming that LazyLoadedModule has been loaded.
• Component Visibility: After loading, the three components (ComponentA, ComponentB, ComponentC) should be visible on the page (e.g., within a div).

Expected Behavior:

1. The application starts without LazyLoadedModule loaded.
2. Clicking the "Load Lazy Module" button triggers the lazy loading of LazyLoadedModule.
3. A confirmation message "Lazy Loaded Module Loaded!" is displayed.
4. ComponentA, ComponentB, and ComponentC are rendered on the page.

Edge Cases to Consider:

• Error handling during module loading (though a full error handling implementation is not required for this challenge, consider how you might handle it in a real-world scenario).
• Ensure the components are properly rendered after loading.

Examples

Example 1:

Input: Application starts, "Load Lazy Module" button is clicked.
Output: "Lazy Loaded Module Loaded!" message is displayed, ComponentA, ComponentB, and ComponentC are visible.
Explanation: The lazy loading mechanism successfully loads the module and its components.

Example 2:

Input: Application starts, no button clicks.
Output: No "Lazy Loaded Module Loaded!" message, no ComponentA, ComponentB, or ComponentC are visible.
Explanation: The module remains unloaded as expected.

Constraints

• Angular Version: Use Angular 16 or later.
• Component Count: The LazyLoadedModule must contain exactly three components: ComponentA, ComponentB, and ComponentC.
• Loading Trigger: The loading must be triggered by a button click in the main application.
• Performance: While not a primary focus, avoid unnecessary re-renders or complex logic that would negatively impact performance.
• No External Libraries: Do not use any external libraries beyond the standard Angular ecosystem.

Notes

• You'll need to create a main application module and the LazyLoadedModule.
• Use Angular's loadChildren property in your routing configuration to implement lazy loading.
• Consider using a simple template for each component (e.g., displaying its name).
• Focus on the core lazy loading mechanism; elaborate component logic is not required. The goal is to demonstrate the loading process itself.
• Think about how you would verify that the module has actually been loaded (e.g., by displaying a confirmation message).