Dynamic Nested Layouts in Vue.js

This challenge focuses on implementing a flexible and dynamic nested layout system in a Vue.js application using TypeScript. You will build components that can accept and render other components within their structure, allowing for complex page compositions. This is a fundamental pattern for building scalable and maintainable UIs.

Problem Description

Your task is to create a system of Vue.js components that allows for arbitrary nesting of layouts. A "layout" component should be able to render its own structure and also accept other components (which can themselves be layouts or content components) as children. This enables you to build complex page structures where different sections of the page might adhere to different layout rules.

Key Requirements:

1. Layout Component: Create a base LayoutComponent that can define a structural template (e.g., a header, sidebar, main content area, footer).
2. Slotting: The LayoutComponent must utilize Vue's slot mechanism to allow for content to be injected into specific areas defined by its template.
3. Nesting: You should be able to nest LayoutComponent instances within each other. For example, a main page layout might contain a sidebar layout, which in turn contains a navigation menu.
4. Dynamic Content: The slots should be able to accept any Vue component, including other layout components or simple content components.
5. TypeScript: All components and their props must be defined using TypeScript for strong typing.

Expected Behavior:

When rendering a root layout component with nested children, the output HTML structure should accurately reflect the defined layout hierarchy, with content correctly placed within the respective slots.

Edge Cases:

• Layouts with no children.
• Deeply nested layouts (e.g., 5+ levels).
• Layouts with named slots.

Examples

Example 1: Simple Two-Level Layout

Imagine a PageLayout component that has a header slot and a main slot. The main slot will then contain a SidebarLayout component which has a content slot.

• PageLayout.vue (Structure):

  <template>
    <div class="page-container">
      <header>
        <slot name="header">Default Header</slot>
      </header>
      <main>
        <slot name="main"></slot>
      </main>
      <footer>
        <slot name="footer">Default Footer</slot>
      </footer>
    </div>
  </template>
  

• SidebarLayout.vue (Structure):

  <template>
    <div class="sidebar-container">
      <aside class="sidebar">
        <slot name="sidebar-nav">Default Nav</slot>
      </aside>
      <div class="content">
        <slot></slot> <!-- Default slot -->
      </div>
    </div>
  </template>
  

• App.vue (Usage):

  <template>
    <PageLayout>
      <template #header><h1>My Awesome App</h1></template>
      <template #main>
        <SidebarLayout>
          <template #sidebar-nav>
            <ul><li>Link 1</li><li>Link 2</li></ul>
          </template>
          <div>This is the main content area.</div>
        </SidebarLayout>
      </template>
      <template #footer><p>&copy; 2023</p></template>
    </PageLayout>
  </template>
  

• Expected Output (Simplified HTML):

  <div class="page-container">
    <header><h1>My Awesome App</h1></header>
    <main>
      <div class="sidebar-container">
        <aside class="sidebar"><ul><li>Link 1</li><li>Link 2</li></ul></aside>
        <div class="content"><div>This is the main content area.</div></div>
      </div>
    </main>
    <footer><p>&copy; 2023</p></footer>
  </div>
  

Example 2: Deeper Nesting with Default Slots

Consider a ArticleLayout component that has a main content area. Inside this, we might have a SectionLayout which also has a main content area.

• ArticleLayout.vue (Structure):

  <template>
    <div class="article-layout">
      <h2>Article Title</h2>
      <div class="article-body">
        <slot></slot>
      </div>
    </div>
  </template>
  

• SectionLayout.vue (Structure):

  <template>
    <div class="section-layout">
      <h3>Section Title</h3>
      <div class="section-content">
        <slot></slot>
      </div>
    </div>
  </template>
  

• App.vue (Usage):

  <template>
    <ArticleLayout>
      <SectionLayout>
        <p>Content for the first section.</p>
      </SectionLayout>
      <SectionLayout>
        <p>Content for the second section.</p>
      </SectionLayout>
    </ArticleLayout>
  </template>
  

• Expected Output (Simplified HTML):

  <div class="article-layout">
    <h2>Article Title</h2>
    <div class="article-body">
      <div class="section-layout">
        <h3>Section Title</h3>
        <div class="section-content">
          <p>Content for the first section.</p>
        </div>
      </div>
      <div class="section-layout">
        <h3>Section Title</h3>
        <div class="section-content">
          <p>Content for the second section.</p>
        </div>
      </div>
    </div>
  </div>
  

Constraints

• The solution must be implemented using Vue.js 3 with the Composition API.
• All component definitions and prop types must be in TypeScript.
• The solution should demonstrate at least two distinct layout components, each with at least one slot.
• The demonstration of nesting should involve at least three levels of component hierarchy.
• No external libraries for layout management should be used (e.g., Vuetify, Quasar).

Notes

• Focus on how Vue's slots and component composition enable this pattern.
• Consider how you might pass data down through nested layouts if needed (though not strictly required by this challenge, it's a common extension).
• Think about the reusability of your layout components.
• The provided examples show simplified HTML. Your actual rendered output will include Vue's internal attributes and potentially CSS classes if you choose to add styling.