Vue Diagnostic Dashboard

Imagine you are building a complex Vue application. As the application grows, it becomes increasingly difficult to understand its internal state and performance. This challenge asks you to create a diagnostic dashboard that provides insights into the Vue component tree and its associated data. This is crucial for debugging, performance optimization, and understanding how your application is behaving in real-time.

Problem Description

Your task is to implement a diagnostic dashboard component in Vue (using TypeScript) that can visualize the structure of the application's component tree and display the data associated with each component.

What needs to be achieved:

• A Vue component that acts as a diagnostic dashboard.
• The ability to traverse and display the Vue component tree.
• For each component, display its name and its reactive data.

Key requirements:

• The dashboard should be a self-contained Vue component.
• It needs to access the global Vue application instance or the root component to start traversing the tree.
• For each component in the tree, display:
  • The component's name (e.g., App, UserProfile, Button).
  • A representation of its reactive data (e.g., data, props, computed properties). You should aim to display key-value pairs of the reactive data.
• The display should be hierarchical, reflecting the parent-child relationships of components.

Expected behavior:

• When the diagnostic dashboard component is rendered, it should automatically inspect the current Vue application and populate itself with the component tree information.
• The output should be a clear, readable representation of the component hierarchy and their data.

Important edge cases to consider:

• Components with no reactive data.
• Components with deeply nested reactive data structures.
• The root component of the application.

Examples

Example 1:

// Assuming a simple Vue app structure:
// App
//  - Header
//  - MainContent
//      - UserProfile
//          - Avatar
//          - UserDetails

// Input (Conceptual - represents the internal Vue tree):
// Root Component: App
//   - data: { title: 'My App' }
//   - children:
//     - Header
//       - data: { navLinks: [...] }
//     - MainContent
//       - data: { currentPage: 'dashboard' }
//       - children:
//         - UserProfile
//           - props: { userId: 123 }
//           - data: { isLoading: false }
//           - children:
//             - Avatar
//               - props: { imageUrl: '...' }
//             - UserDetails
//               - data: { userInfo: { name: 'John Doe', email: '...' } }

// Output (Visual Representation - what the dashboard might display):

Diagnostic Dashboard
  App
    Data:
      title: "My App"
    Children:
      Header
        Data:
          navLinks: [...]
      MainContent
        Data:
          currentPage: "dashboard"
        Children:
          UserProfile
            Props:
              userId: 123
            Data:
              isLoading: false
            Children:
              Avatar
                Props:
                  imageUrl: "..."
              UserDetails
                Data:
                  userInfo: { name: "John Doe", email: "..." }

Example 2:

// Input (Conceptual - a component with no reactive data, or only setup-defined refs/reactives):
// Component: Button
//   - props: { text: 'Click Me' }
//   - setup: (using Composition API)
//     const count = ref(0); // This is reactive data

// Output (Visual Representation):

Diagnostic Dashboard
  Button
    Props:
      text: "Click Me"
    Data:
      count: 0

Constraints

• The solution must be implemented in TypeScript and compatible with Vue 3.
• You will need to leverage Vue's internal APIs or hooks to access component instances and their data. This might involve looking into Vue's devtools internals or experimental APIs if available, but prioritize stable approaches if possible.
• The dashboard should ideally update in near real-time as the application's state changes, though a manual refresh mechanism is also acceptable as a starting point.
• Avoid modifying the original application components themselves. The dashboard should be a separate entity.

Notes

This challenge requires a deep understanding of Vue's internal architecture and how components are managed. You'll likely need to explore how to access the component tree from a root instance. Consider how to handle different types of reactive data (e.g., data, props, computed, ref, reactive in Composition API). For displaying complex data structures, consider simple stringification or a limited depth of recursion. The goal is to provide a functional diagnostic tool, not necessarily a perfectly formatted UI mirroring a full-fledged dev tool.