Implementing ng-container for Conditional Rendering in Angular

Angular's ng-container is a powerful tool for structuring your templates without introducing unnecessary DOM elements. This challenge focuses on demonstrating the use of ng-container to conditionally render sections of a component's template based on a boolean flag, ensuring clean and efficient rendering. Understanding ng-container is crucial for optimizing Angular applications and avoiding performance bottlenecks caused by extra DOM nodes.

Problem Description

You are tasked with creating an Angular component that conditionally displays different sections of its template based on a boolean flag called showDetails. The component should have a property details which is an object containing some data to be displayed when showDetails is true. You must use ng-container to achieve this conditional rendering. Do not use *ngIf directly on <div> or other structural elements. The goal is to demonstrate the use of ng-container to avoid adding unnecessary DOM elements when a section is not displayed.

Key Requirements:

• The component must have a showDetails boolean property.
• The component must have a details property, which is an object with title and description properties.
• When showDetails is true, the component should display the title and description from the details object.
• When showDetails is false, the component should not render any DOM elements related to the details section. This is the key point - no extra <div> or other elements should be present in the DOM when showDetails is false.
• The component should have a button that toggles the showDetails flag.

Expected Behavior:

• Initially, showDetails should be false.
• Clicking the "Show Details" button should set showDetails to true, and the details section should be rendered.
• Clicking the "Hide Details" button should set showDetails to false, and the details section should be removed from the DOM.
• The component should not introduce any unnecessary DOM elements when showDetails is false.

Edge Cases to Consider:

• What happens if details is null or undefined? (The component should handle this gracefully, ideally not throwing an error). For simplicity, assume details will always be an object with title and description when showDetails is true.
• Consider the performance implications of using *ngIf on structural elements versus ng-container.

Examples

Example 1:

Input: showDetails = false, details = { title: "My Title", description: "My Description" }
Output:  A component with a button labeled "Show Details". No details section is rendered.
Explanation: The component is initialized with `showDetails` set to `false`, so the details section is not displayed.

Example 2:

Input: showDetails = true, details = { title: "Important Information", description: "This is crucial data." }
Output: A component with a button labeled "Hide Details" and a section displaying "Important Information" as the title and "This is crucial data." as the description.
Explanation:  `showDetails` is true, so the details section is rendered using `ng-container`.

Constraints

• The solution must be written in TypeScript.
• The solution must use Angular version 14 or higher.
• The solution must use ng-container to conditionally render the details section. Directly using *ngIf on <div> or other structural elements is not allowed.
• The component should be relatively simple and focused on demonstrating the use of ng-container.
• The component should be testable (although writing tests is not required for this challenge).

Notes

• Think about how ng-container differs from *ngIf when applied to structural elements.
• Consider the performance benefits of using ng-container to avoid unnecessary DOM elements.
• Focus on the conditional rendering logic and the proper use of ng-container. Styling is not a primary concern.
• You can use Angular's template syntax (interpolation, property binding, etc.) as needed.