examples/advance/customer_insights_dashboard/frontend_design.txt


Single Page HTML/JavaScript Frontend:

1. Layout:
   - Responsive design using CSS Grid or Flexbox
   - Header with logo and user info
   - Sidebar for navigation
   - Main content area for customer data display and editing

2. Components:
   - Login form
   - Customer list table (sortable and paginated)
   - Customer detail view/edit form
   - Search bar with auto-suggest
   - Modal for confirmations (e.g., delete customer)

3. JavaScript Functionality:
   - Use Fetch API for AJAX calls to backend
   - Implement client-side form validation
   - Dynamic updating of customer list and details
   - Implement debounce for search input

4. Security Measures:
   - Implement CSP (Content Security Policy)
   - Use HttpOnly cookies for authentication
   - Sanitize user inputs

5. Accessibility:
   - Ensure proper ARIA labels
   - Implement keyboard navigation
   - Use semantic HTML elements

Pseudocode for main HTML structure:

```html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Customer Insights Dashboard</title>
    <link rel="stylesheet" href="styles.css">
</head>
<body>
    <header>
        <!-- Logo and user info -->
    </header>
    
    <nav>
        <!-- Sidebar navigation -->
    </nav>
    
    <main>
        <section id="customer-list">
            <!-- Search bar -->
            <!-- Paginated customer table -->
        </section>
        
        <section id="customer-details" hidden>
            <!-- Customer detail view/edit form -->
        </section>
    </main>
    
    <div id="modal" hidden>
        <!-- Modal for confirmations -->
    </div>
    
    <script src="app.js"></script>
</body>
</html>
```

JavaScript pseudocode:

```javascript
// Event listeners
document.addEventListener('DOMContentLoaded', initApp);

// Initialize app
function initApp() {
    fetchCustomers();
    setupEventListeners();
}

// Fetch customers from API
async function fetchCustomers() {
    // Use Fetch API to get customers and update DOM
}

// Setup event listeners
function setupEventListeners() {
    // Add listeners for search, sort, edit, delete actions
}

// Handle customer edit
function editCustomer(id) {
    // Show edit form and handle submission
}

// Handle customer delete
function deleteCustomer(id) {
    // Show confirmation modal and handle deletion
}

// Search functionality
const searchInput = document.getElementById('search');
searchInput.addEventListener('input', debounce(handleSearch, 300));

function handleSearch() {
    // Perform search and update customer list
}

// Debounce function
function debounce(func, delay) {
    // Implement debounce logic
}
```