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featureFlags.ts - Feature Flags Management System

Purpose

Centralized feature flag configuration with type safety and runtime control. Enables controlled rollout of features across different environments and user segments with comprehensive validation.

Key Components

Feature Flag Categories

Authentication Features

  • enablePasswordReset: Password reset functionality (default: true)
  • enableSocialLogin: Third-party authentication integration (default: false)
  • enableTwoFactorAuth: Multi-factor authentication support (default: false)

Upload Features

  • enableMultipleFileUpload: Batch file upload capability (default: true)
  • enableDragDropUpload: Drag-and-drop file interface (default: true)
  • enableUploadProgress: Upload progress tracking (default: true)
  • enableFilePreview: File preview before upload (default: true)

Review Features

  • enableAiReviews: AI-powered review generation (default: false)
  • enableCollaborativeReviews: Multi-user review collaboration (default: false)
  • enableReviewComments: Comment system for reviews (default: true)
  • enableReviewExport: Export functionality for reviews (default: true)

UI Features

  • enableDarkMode: Dark theme support (default: true)
  • enableNotifications: In-app notification system (default: true)
  • enableBreadcrumbs: Navigation breadcrumb trail (default: true)
  • enableSidebar: Collapsible sidebar navigation (default: true)
  • enableWebSocket: Real-time communication features (default: true)

Performance Features

  • enableVirtualization: Large list virtualization (default: false)
  • enableLazyLoading: Component lazy loading (default: true)
  • enableCodeSplitting: Bundle code splitting (default: true)

Monitoring Features

  • enableAnalytics: User analytics tracking (default: false)
  • enableErrorReporting: Error monitoring integration (default: true)
  • enablePerformanceMonitoring: Performance metrics collection (default: true)

Configuration Sources

Window Global Override

  • Runtime Configuration: window.FEATURE_FLAGS for dynamic overrides
  • Development Testing: Easily toggle features during development
  • A/B Testing: Support for user segment-specific flags

Environment Integration

  • Environment-Aware: Integrates with environment configuration
  • Type Safety: Zod schema validation for all feature flags
  • Default Values: Sensible defaults for all environments

Usage Patterns

Component Integration

const featureFlags = getFeatureFlags();
if (featureFlags.enableDarkMode) {
  // Render dark mode toggle
}

Conditional Rendering

  • Feature Gating: Hide/show components based on flags
  • Progressive Enhancement: Gradually enable advanced features
  • Fallback Handling: Graceful degradation when features disabled

Schema Validation

  • Zod Integration: Type-safe feature flag definitions
  • Boolean Validation: All flags validated as boolean values
  • Default Handling: Automatic fallback to schema defaults
  • Error Logging: Configuration errors logged for debugging

Development Workflow

Feature Development

  1. Add Flag: Define new feature flag in schema
  2. Implement: Build feature with flag checks
  3. Test: Verify both enabled/disabled states
  4. Deploy: Gradual rollout via flag configuration

Flag Lifecycle

  • Introduction: Start with false default for new features
  • Testing: Enable for development/staging environments
  • Rollout: Gradually enable for production users
  • Cleanup: Remove flag after full rollout

Integration Points

  • Environment Config: Works with environment configuration system
  • Component System: Integrated throughout UI components
  • Analytics: Tracks feature usage and adoption
  • Error Handling: Graceful handling of flag configuration errors

Performance Considerations

  • One-Time Loading: Flags loaded once at application startup
  • Memory Efficient: Minimal overhead for flag checks
  • Build Optimization: Dead code elimination for disabled features

Security & Privacy

  • Client-Safe Flags: Only non-sensitive flags exposed to frontend
  • Privacy Controls: Analytics and monitoring flags for user privacy
  • Access Control: Feature access based on user permissions