Frontend Architecture Map of Content

🎯 Overview

Central hub for all frontend architecture documentation, UI/UX patterns, component libraries, and implementation guides across Nimbly Compass platforms. This MOC covers web applications, mobile apps, and admin interfaces.

Quick Start

• New to frontend? Start with Frontend Overview
• Component Development? Check Component Library
• State Management? Visit State Management
• Mobile Development? See Mobile Architecture

🏗️ Architecture Overview

Technology Stack

Web Applications

• Framework: React 18+
• State Management: Redux Toolkit
• Styling: Material-UI + Styled Components
• Build Tool: Webpack/Vite
• Testing: Jest + React Testing Library
• Type Checking: TypeScript

Mobile Applications (2.0 App)

• Framework: React Native
• Navigation: React Navigation
• State: Redux + Redux Persist
• UI: React Native Elements
• Storage: AsyncStorage
• Testing: Detox + Jest

Application Architecture

graph TB
    A[User Interface] --> B[Component Layer]
    B --> C[Container Layer]
    C --> D[State Management]
    D --> E[API Layer]
    E --> F[Backend Services]
    
    C --> G[Routing]
    C --> H[Hooks]
    D --> I[Redux Store]
    
    style B fill:#f9f,stroke:#333,stroke-width:2px
    style D fill:#bbf,stroke:#333,stroke-width:2px

🧩 Component Library

Core Components

Reusable UI components across applications:

Layout Components

• AppLayout - Main application wrapper
• NavigationBar - Top navigation
• Sidebar - Side navigation
• Footer - Application footer
• PageContainer - Page wrapper

Data Display

• DataTable - Advanced tables
• Card - Content cards
• List - List displays
• Timeline - Timeline view
• Charts - Data visualization

Form Components

• FormBuilder - Dynamic forms
• TextField - Input fields
• SelectField - Dropdowns
• DatePicker - Date selection
• FileUpload - File handling

Component Patterns

// Component Structure Example
const FeatureComponent = ({ data, onAction }) => {
  const [state, setState] = useState(initialState);
  const dispatch = useDispatch();
  
  useEffect(() => {
    // Side effects
  }, [dependencies]);
  
  const handleAction = useCallback(() => {
    // Handle user actions
  }, [dependencies]);
  
  return (
    <Container>
      {/* Component JSX */}
    </Container>
  );
};

📱 Platform-Specific Implementations

Web Frontend

Core web application features:

• Executive Dashboard UI
• Issue Tracker UI
• Reports Hub UI
• Sites Management UI
• User Management UI

Mobile Frontend (2.0 App)

Mobile-specific implementations:

• Mobile Issue Tracker
• Mobile Reports
• Mobile Gallery
• Mobile Audits

Admin Frontend

Administrative interfaces:

• Admin Dashboard
• Settings Panel
• Report Configuration
• Access Control UI

🔄 State Management

Redux Architecture

graph LR
    A[UI Component] --> B[Action]
    B --> C[Reducer]
    C --> D[Store]
    D --> E[State]
    E --> A
    
    B --> F[Middleware]
    F --> G[API Call]
    G --> H[Response]
    H --> B
    
    style D fill:#bbf,stroke:#333,stroke-width:2px

Store Structure

{
  auth: {
    user: {...},
    token: string,
    isAuthenticated: boolean
  },
  features: {
    dashboard: {...},
    issues: {...},
    reports: {...},
    sites: {...},
    users: {...}
  },
  ui: {
    loading: boolean,
    notifications: [],
    modal: {...},
    theme: 'light|dark'
  }
}

State Management Patterns

• Redux Toolkit Usage
• Async Actions with Thunks
• Normalized State Shape
• Reselect for Memoization
• Redux Persist Configuration

🎨 UI/UX Design System

Design Principles

1. Consistency: Unified experience across platforms
2. Accessibility: WCAG 2.1 AA compliance
3. Responsiveness: Mobile-first approach
4. Performance: Optimized rendering
5. Intuitiveness: Clear user flows

Theme Configuration

const theme = createTheme({
  palette: {
    primary: {
      main: '#1976d2',
      light: '#42a5f5',
      dark: '#1565c0'
    },
    secondary: {
      main: '#dc004e',
      light: '#e33371',
      dark: '#9a0036'
    }
  },
  typography: {
    fontFamily: '"Roboto", "Helvetica", "Arial", sans-serif',
    h1: { fontSize: '2.5rem' },
    body1: { fontSize: '1rem' }
  },
  spacing: 8
});

Component Styling

• Material-UI theming
• Styled Components
• CSS Modules
• Responsive utilities
• Animation library

🚀 Performance Optimization

Code Splitting

// Route-based splitting
const Dashboard = lazy(() => import('./pages/Dashboard'));
const Reports = lazy(() => import('./pages/Reports'));
 
// Component-based splitting
const HeavyComponent = lazy(() => 
  import(/* webpackChunkName: "heavy" */ './components/Heavy')
);

Optimization Techniques

• React.memo for component memoization
• useMemo and useCallback hooks
• Virtual scrolling for large lists
• Image lazy loading
• Bundle size optimization
• Service Worker caching

Performance Monitoring

// Web Vitals tracking
import { getCLS, getFID, getFCP, getLCP, getTTFB } from 'web-vitals';
 
getCLS(console.log);
getFID(console.log);
getFCP(console.log);
getLCP(console.log);
getTTFB(console.log);

📱 Mobile Architecture

React Native Structure

src/
├── components/      # Shared components
├── screens/        # Screen components
├── navigation/     # Navigation config
├── store/          # Redux store
├── services/       # API services
├── utils/          # Utilities
└── assets/         # Images, fonts

Mobile-Specific Features

• Offline functionality
• Push notifications
• Camera integration
• GPS location services
• Biometric authentication
• Local storage sync

Platform Differences

// Platform-specific code
import { Platform } from 'react-native';
 
const styles = StyleSheet.create({
  container: {
    marginTop: Platform.OS === 'ios' ? 20 : 0,
    ...Platform.select({
      ios: { shadowColor: '#000' },
      android: { elevation: 4 }
    })
  }
});

🧪 Testing Strategy

Testing Pyramid

1. Unit Tests (70%)

   • Component logic
   • Utility functions
   • Reducers
   • Selectors

2. Integration Tests (20%)

   • Component integration
   • API integration
   • State management

3. E2E Tests (10%)

   • Critical user flows
   • Cross-browser testing
   • Mobile app flows

Testing Examples

// Component Test
describe('IssueCard', () => {
  it('renders issue details correctly', () => {
    render(<IssueCard issue={mockIssue} />);
    expect(screen.getByText(mockIssue.title)).toBeInTheDocument();
  });
  
  it('calls onEdit when edit clicked', () => {
    const onEdit = jest.fn();
    render(<IssueCard issue={mockIssue} onEdit={onEdit} />);
    fireEvent.click(screen.getByText('Edit'));
    expect(onEdit).toHaveBeenCalledWith(mockIssue.id);
  });
});

🔧 Development Tools

Development Setup

• VS Code with extensions
• React Developer Tools
• Redux DevTools
• ESLint + Prettier
• Husky + lint-staged
• Storybook

Build Pipeline

graph LR
    A[Source Code] --> B[Lint]
    B --> C[Test]
    C --> D[Build]
    D --> E[Optimize]
    E --> F[Deploy]
    
    style C fill:#f9f,stroke:#333,stroke-width:2px
    style F fill:#bbf,stroke:#333,stroke-width:2px

📚 Frontend Resources

Documentation

• Component Documentation
• State Management Guide
• Testing Best Practices
• Performance Guide
• Accessibility Guidelines

Development Guides

• Setting Up Development Environment
• Creating New Components
• Adding New Features
• Debugging Guide
• Deployment Process

Code Standards

• React Best Practices
• TypeScript Guidelines
• CSS/Styling Standards
• Component Naming Conventions
• File Structure Guidelines

🏷️ Related MOCs

• Backend Architecture
• Mobile Architecture
• Design System
• DevOps & Deployment

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📊 Frontend Documentation Coverage

Area	Documentation	Status	Priority
Component Library	✅ Complete	Active	High
State Management	✅ Complete	Active	High
Testing Guide	⏳ In Progress	Draft	Medium
Performance Guide	⏳ In Progress	Draft	High
Mobile Guide	✅ Complete	Active	High
Accessibility	📝 Planned	-	Medium

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This MOC is maintained by the Frontend Team. Last review: 2024-01-25 For questions or improvements, contact: Frontend Team Lead