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Organizing large-scale projects

Building large-scale applications with Aurelia 2 requires careful planning and organization. This guide provides best practices for structuring your projects, managing dependencies, and scaling your applications effectively.

Core Principles

Before diving into specific patterns, it's important to understand the core principles that guide these recommendations:

  1. Separation of Concerns - Keep different aspects of your application isolated from each other

  2. Scalability - Structure that grows with your team and application complexity

  3. Maintainability - Code that's easy to understand, modify, and debug

  4. Testability - Architecture that facilitates comprehensive testing

  5. Performance - Structure that enables optimization without major refactoring

Project Structure Patterns

Feature-Based Architecture (Recommended)

Feature-based organization is recommended over technical-layer organization for several reasons:

  • Improved Cohesion: Related code stays together, making it easier to understand and modify features

  • Better Scalability: Teams can work on features independently without stepping on each other

  • Easier Code Splitting: Features naturally align with lazy-loading boundaries

  • Reduced Coupling: Features can be developed, tested, and deployed more independently

Here's how to structure a feature-based application:

my-aurelia-app/
├── src/
│   ├── features/
│   │   ├── user/
│   │   │   ├── components/           # Feature-specific components
│   │   │   │   ├── user-list.ts
│   │   │   │   ├── user-list.html
│   │   │   │   ├── user-detail.ts
│   │   │   │   └── user-detail.html
│   │   │   ├── services/             # Feature-specific services
│   │   │   │   └── user-state.ts
│   │   │   ├── models/               # Domain models
│   │   │   │   └── user.ts
│   │   │   └── index.ts              # Feature module export
│   │   ├── products/
│   │   │   ├── components/
│   │   │   ├── services/
│   │   │   └── index.ts
│   │   └── orders/
│   │       ├── components/
│   │       ├── services/
│   │       └── index.ts
│   ├── shared/                       # Shared across features
│   │   ├── components/
│   │   │   ├── spinner.ts
│   │   │   ├── error-list.ts
│   │   │   └── index.ts
│   │   ├── services/
│   │   │   ├── api.ts
│   │   │   ├── auth.ts
│   │   │   └── index.ts
│   │   ├── resources/
│   │   │   ├── value-converters/
│   │   │   ├── binding-behaviors/
│   │   │   └── custom-attributes/
│   │   └── index.ts                  # Barrel export
│   ├── styles/
│   │   ├── global.css
│   │   └── themes/
│   ├── main.ts                       # Application entry point
│   └── app.ts                        # Root component
├── tests/
│   ├── unit/
│   ├── integration/
│   └── e2e/
├── package.json
└── tsconfig.json

Monorepo Structure

A monorepo structure is beneficial for large organizations because:

  • Code Sharing: Easy to share components, utilities, and types across applications

  • Atomic Changes: Can make coordinated changes across multiple packages in a single commit

  • Consistent Tooling: Single set of build tools, linting rules, and dependencies

  • Better Refactoring: IDE support for renaming and refactoring across all packages

Why Turbo?

Turbo is recommended for monorepo orchestration because:

  • Intelligent Caching: Only rebuilds what changed, dramatically speeding up builds

  • Parallel Execution: Runs tasks across packages in parallel when possible

  • Remote Caching: Teams can share build artifacts, reducing CI/CD times

  • Pipeline Management: Declaratively define task dependencies between packages

For enterprise applications with multiple teams or deployable units:

enterprise-app/
├── packages/
│   ├── core/                         # Core framework extensions
│   │   ├── src/
│   │   │   ├── services/
│   │   │   ├── interfaces/
│   │   │   └── index.ts
│   │   ├── package.json
│   │   └── tsconfig.json
│   ├── shared-ui/                    # Shared component library
│   │   ├── src/
│   │   │   ├── components/
│   │   │   ├── styles/
│   │   │   └── index.ts
│   │   └── package.json
│   ├── admin-app/                    # Admin application
│   │   ├── src/
│   │   │   ├── features/
│   │   │   └── main.ts
│   │   └── package.json
│   ├── customer-app/                 # Customer application
│   │   ├── src/
│   │   │   ├── features/
│   │   │   └── main.ts
│   │   └── package.json
│   └── api-client/                   # Shared API client
│       ├── src/
│       └── package.json
├── tools/                            # Build tools and scripts
├── docs/                             # Documentation
├── turbo.json                        # Turbo configuration
├── package.json
└── tsconfig.json

Application Bootstrap Patterns

Basic Bootstrap

// src/main.ts
import { Aurelia, StandardConfiguration } from 'aurelia';
import { MyApp } from './app';

await new Aurelia()
  .register(StandardConfiguration)
  .app({
    host: document.querySelector('app-root'),
    component: MyApp
  })
  .start();

Advanced Bootstrap with Configuration

// src/main.ts
import { Aurelia, LoggerConfiguration, LogLevel } from 'aurelia';
import { RouterConfiguration } from '@aurelia/router';
import * as GlobalResources from './shared';
import { registerFeatures } from './features';

const au = new Aurelia();

// Configure logging
au.register(LoggerConfiguration.create({
  level: LogLevel.debug,
  sinks: [ConsoleSink]
}));

// Configure router
au.register(RouterConfiguration.customize({
  useUrlFragmentHash: false,
  resolutionMode: 'static',
  navigationSyncStates: ['guardedUnload', 'swapped', 'completed']
}));

// Register global resources
au.register(GlobalResources);

// Register feature modules
au.register(registerFeatures);

// Start application
await au.app({
  host: document.querySelector('app-root'),
  component: () => import('./app')
}).start();

State Management Architecture

State Management Options in Aurelia 2

Aurelia 2 provides two main approaches to state management:

  1. DI-Based Services (Recommended for most cases)

    • Simple, testable, and TypeScript-friendly

    • No additional libraries or patterns to learn

    • Perfect for component-level and feature-level state

    • Works great with Aurelia's reactive binding system

  2. @aurelia/state (For complex global state)

    • Redux-like state management with reactive bindings

    • Provides @fromState decorator for component bindings

    • Memoized selectors for computed values

    • Action-based state updates with reducers

When to Use Each Approach

DI-Based Services

Use when:

  • State is scoped to a feature or component

  • You need simple CRUD operations

  • Testing is a priority

  • Team prefers familiar OOP patterns

  • You want minimal complexity

@aurelia/state

Use when:

  • You need truly global application state

  • Multiple unrelated components need the same state

  • You want predictable state updates through actions

  • Complex state relationships require memoized selectors

  • You need to debug state changes systematically

DI-Based State Management Pattern (Recommended)

Create dedicated state services using dependency injection:

// src/features/user/services/user-state.ts
import { DI, resolve } from '@aurelia/kernel';
import { IApiClient } from '../../../shared/services/api';

export interface IUserState {
  readonly users: User[];
  readonly currentUser: User | null;
  readonly isLoading: boolean;
  readonly error: string | null;
  loadUsers(): Promise<void>;
  loadUser(id: string): Promise<void>;
  createUser(user: Partial<User>): Promise<void>;
}

export const IUserState = DI.createInterface<IUserState>('IUserState', x =>
  x.singleton(UserState)
);

class UserState implements IUserState {
  private api = resolve(IApiClient);

  users: User[] = [];
  currentUser: User | null = null;
  isLoading = false;
  error: string | null = null;

  // Request deduplication prevents multiple identical API calls
  private pendingRequests = new Map<string, Promise<any>>();

  async loadUsers(): Promise<void> {
    const key = 'loadUsers';

    // Deduplicate concurrent requests
    // This prevents race conditions when multiple components
    // request the same data simultaneously
    if (this.pendingRequests.has(key)) {
      return this.pendingRequests.get(key);
    }

    const promise = this.executeLoadUsers();
    this.pendingRequests.set(key, promise);

    try {
      await promise;
    } finally {
      this.pendingRequests.delete(key);
    }
  }

  private async executeLoadUsers(): Promise<void> {
    this.isLoading = true;
    this.error = null;

    try {
      this.users = await this.api.get<User[]>('/users');
    } catch (error) {
      this.error = error.message;
      throw error;
    } finally {
      this.isLoading = false;
    }
  }

  async loadUser(id: string): Promise<void> {
    // Similar implementation with deduplication
  }

  async createUser(user: Partial<User>): Promise<void> {
    // Implementation
  }
}

Using @aurelia/state for Complex Scenarios

@aurelia/state provides Redux-like state management with reactive bindings:

// src/features/shopping/state/cart-state.ts
import { Store, fromState, createStateMemoizer } from '@aurelia/state';

// Define the state shape
interface CartState {
  items: CartItem[];
  taxRate: number;
}

// Initial state
const initialState: CartState = {
  items: [],
  taxRate: 0.08
};

// Action handlers
const cartReducer = (state: CartState, action: any): CartState => {
  switch (action.type) {
    case 'ADD_ITEM':
      const existing = state.items.find(item => item.productId === action.product.id);
      if (existing) {
        return {
          ...state,
          items: state.items.map(item =>
            item.productId === action.product.id
              ? { ...item, quantity: item.quantity + action.quantity }
              : item
          )
        };
      }
      return {
        ...state,
        items: [...state.items, { ...action.product, quantity: action.quantity }]
      };

    case 'REMOVE_ITEM':
      return {
        ...state,
        items: state.items.filter(item => item.productId !== action.productId)
      };

    default:
      return state;
  }
};

// Memoized selectors for computed values
const selectSubtotal = createStateMemoizer(
  (state: CartState) => state.items,
  (items) => items.reduce((sum, item) => sum + item.price * item.quantity, 0)
);

const selectTax = createStateMemoizer(
  (state: CartState) => ({ items: state.items, taxRate: state.taxRate }),
  ({ items, taxRate }) => items.reduce((sum, item) => sum + item.price * item.quantity, 0) * taxRate
);

const selectTotal = createStateMemoizer(
  (state: CartState) => state,
  (state) => {
    const subtotal = selectSubtotal(state);
    const tax = selectTax(state);
    return subtotal + tax;
  }
);

// Configure in main.ts
import { StateDefaultConfiguration } from '@aurelia/state';
au.register(StateDefaultConfiguration.init(initialState, cartReducer));

Using DI-Based State in Components

// src/features/user/components/user-list.ts
import { IUserState } from '../services/user-state';
import { resolve } from '@aurelia/kernel';

export class UserList {
  // The resolve() helper is a cleaner alternative to constructor injection
  // It works because Aurelia creates components through DI
  private userState = resolve(IUserState);

  async attaching(): Promise<void> {
    // Load data during the attaching lifecycle
    // This blocks rendering until data is loaded
    await this.userState.loadUsers();
  }

  get users() {
    // Aurelia's binding system will automatically update
    // the view when userState.users changes
    return this.userState.users;
  }

  get isLoading() {
    return this.userState.isLoading;
  }
}

Using @aurelia/state in Components

// src/features/shopping/components/cart-summary.ts
import { fromState, Store, createStateMemoizer } from '@aurelia/state';
import { CartState } from '../state/cart-state';

export class CartSummary {
  // Use @fromState decorator to bind to state properties
  @fromState<CartState>(state => state.items)
  items: CartItem[];

  @fromState<CartState>(state => state.taxRate)
  taxRate: number;

  // Use selectors for computed values
  @fromState<CartState>(selectSubtotal)
  subtotal: number;

  @fromState<CartState>(selectTax)
  tax: number;

  @fromState<CartState>(selectTotal)
  total: number;

  constructor(private store: Store<CartState>) {}

  addItem(product: Product, quantity = 1) {
    this.store.dispatch({
      type: 'ADD_ITEM',
      product,
      quantity
    });
  }

  removeItem(productId: string) {
    this.store.dispatch({
      type: 'REMOVE_ITEM',
      productId
    });
  }
}

Template Usage with @aurelia/state

<!-- src/features/shopping/components/cart-summary.html -->
<div class="cart-summary">
  <h3>Cart Summary</h3>

  <div class="items">
    <div repeat.for="item of items & state" class="cart-item">
      <span>${item.name}</span>
      <span>Qty: ${item.quantity}</span>
      <span>${item.price | currency}</span>
      <button click.dispatch="{ type: 'REMOVE_ITEM', productId: item.productId }">
        Remove
      </button>
    </div>
  </div>

  <div class="totals">
    <div>Subtotal: ${subtotal | currency}</div>
    <div>Tax: ${tax | currency}</div>
    <div>Total: ${total | currency}</div>
  </div>
</div>

Comparison: When to Use Each

Feature
DI Services
@aurelia/state

Learning Curve

Low

Medium

Boilerplate

Minimal

Medium

Computed Values

Manual

Memoized Selectors

State Scope

Feature/Component

Global

Testing

Excellent

Good

Performance

Good

Excellent

Best For

Most Use Cases

Complex Global State

Routing Patterns

Why Lazy Loading Routes?

Lazy loading routes is crucial for large applications because:

  • Faster Initial Load: Users only download code for the pages they visit

  • Better Caching: Browser can cache route bundles separately

  • Reduced Memory Usage: Components are only instantiated when needed

  • Natural Code Splitting: Each route becomes its own bundle

Static Route Configuration

// src/app.ts
import { route } from '@aurelia/router';
import { IUserState } from './features/user/services/user-state';

@route({
  routes: [
    {
      id: 'home',
      path: '',
      component: () => import('./features/home/home'),
      title: 'Home'
    },
    {
      path: 'users',
      component: () => import('./features/user/user-layout'),
      children: [
        {
          path: '',
          component: () => import('./features/user/components/user-list'),
          title: 'Users'
        },
        {
          path: ':id',
          component: () => import('./features/user/components/user-detail'),
          title: 'User Detail'
        }
      ]
    },
    {
      path: 'admin',
      component: () => import('./features/admin/admin-layout'),
      data: { requiresAuth: true, roles: ['admin'] }
    }
  ]
})
export class App {
  // Root component logic
}

Navigation Guards

// src/shared/auth/auth-hook.ts
import { lifecycleHooks, ILifecycleHooks, IRouteViewModel } from '@aurelia/router';
import { IAuthService } from '../services/auth';
import { resolve } from '@aurelia/kernel';

@lifecycleHooks()
export class AuthHook implements ILifecycleHooks<IRouteViewModel, 'canLoad'> {
  private auth = resolve(IAuthService);

  canLoad(vm: IRouteViewModel, params: Params, next: RouteNode): boolean | NavigationInstruction {
    const requiresAuth = next.data?.requiresAuth;
    const requiredRoles = next.data?.roles || [];

    if (requiresAuth && !this.auth.isAuthenticated) {
      return this.auth.returnUrl = next.computeAbsolutePath(), 'login';
    }

    if (requiredRoles.length && !this.auth.hasRoles(requiredRoles)) {
      return 'unauthorized';
    }

    return true;
  }
}

// Register globally
au.register(AuthHook);

Resource Management

Understanding Aurelia Resources

Resources in Aurelia 2 include:

  • Custom Elements: Reusable components

  • Custom Attributes: Behaviors attached to elements

  • Value Converters: Transform values in bindings

  • Binding Behaviors: Modify binding behavior

These need to be registered so Aurelia's template compiler can find them. You have two options:

  1. Global Registration: Available everywhere in your app

  2. Local Registration: Available only within a specific component or feature

Global Resource Registration

Use global registration for resources that are used frequently across your application:

// src/shared/index.ts
export * from './components/spinner';
export * from './components/error-list';
export * from './components/confirm-dialog';
export * from './resources/value-converters/format-date';
export * from './resources/value-converters/format-currency';
export * from './resources/binding-behaviors/debounce';
export * from './resources/custom-attributes/tooltip';

// src/main.ts
import * as GlobalResources from './shared';

au.register(GlobalResources);

Feature Module Pattern

Feature modules encapsulate all code for a specific domain. This pattern provides:

  • Clear Boundaries: Each feature is self-contained

  • Easy Testing: Can test features in isolation

  • Team Ownership: Teams can own entire features

  • Gradual Migration: Can migrate features incrementally

// src/features/user/index.ts
import { IContainer } from '@aurelia/kernel';
import { IUserState, UserState } from './services/user-state';
import { UserPermissionService } from './services/user-permission';

export function configureUserFeature(container: IContainer): void {
  container.register(
    // Services
    IUserState,
    UserPermissionService,

    // Feature-specific resources
    // These are registered locally to the feature
  );
}

// src/features/index.ts
import { IContainer } from '@aurelia/kernel';
import { configureUserFeature } from './user';
import { configureProductFeature } from './products';
import { configureOrderFeature } from './orders';

export function registerFeatures(container: IContainer): void {
  configureUserFeature(container);
  configureProductFeature(container);
  configureOrderFeature(container);
}

Build Configuration

Why Vite?

Vite is the recommended build tool for Aurelia 2 applications because:

  • Lightning Fast HMR: Near-instant hot module replacement during development

  • ESM-First: Native ES modules in development, optimized bundles for production

  • Zero Config: Works out of the box with sensible defaults

  • Built-in Optimizations: Automatic code splitting, tree shaking, and minification

  • First-Class TypeScript Support: No additional configuration needed

Modern Build with Vite

// vite.config.ts
import { defineConfig } from 'vite';
import aurelia from '@aurelia/vite-plugin';

export default defineConfig({
  plugins: [aurelia()],
  build: {
    rollupOptions: {
      output: {
        manualChunks: {
          'aurelia': ['aurelia', '@aurelia/router'],
          'vendor': ['date-fns', 'axios']
        }
      }
    }
  },
  resolve: {
    alias: {
      '@': '/src',
      '@shared': '/src/shared',
      '@features': '/src/features'
    }
  }
});

Environment Configuration

Why Environment-Specific Configuration?

Different environments require different settings:

  • Development: Verbose logging, local API endpoints, disabled analytics

  • Staging: Production-like but with test data and endpoints

  • Production: Optimized settings, real endpoints, enabled analytics

Using DI for environment configuration provides:

  • Type safety for configuration values

  • Easy mocking in tests

  • Single source of truth

  • Runtime configuration validation

// src/config/environment.ts
interface IEnvironment {
  production: boolean;
  apiUrl: string;
  features: {
    analytics: boolean;
    debugLogging: boolean;
  };
}

const environments: Record<string, IEnvironment> = {
  development: {
    production: false,
    apiUrl: 'http://localhost:3000/api',
    features: {
      analytics: false,
      debugLogging: true
    }
  },
  staging: {
    production: false,
    apiUrl: 'https://staging-api.example.com',
    features: {
      analytics: true,
      debugLogging: false
    }
  },
  production: {
    production: true,
    apiUrl: 'https://api.example.com',
    features: {
      analytics: true,
      debugLogging: false
    }
  }
};

export const environment = environments[import.meta.env.MODE] || environments.development;

// Register as singleton
export const IEnvironment = DI.createInterface<IEnvironment>('IEnvironment', x =>
  x.instance(environment)
);

Testing Strategies

Why @aurelia/testing?

Aurelia provides its own testing utilities because:

  • Lifecycle Management: Properly handles component lifecycle during tests

  • Fixture Creation: Easy setup of components with dependencies

  • DOM Assertions: Built-in helpers for testing rendered output

  • DI Integration: Seamlessly mock services through DI

  • Async Handling: Proper handling of Aurelia's async operations

Component Testing

// tests/unit/features/user/user-list.spec.ts
import { createFixture } from '@aurelia/testing';
import { UserList } from '../../../../src/features/user/components/user-list';
import { IUserState } from '../../../../src/features/user/services/user-state';

describe('UserList', () => {
  it('should display users', async () => {
    const mockUserState: Partial<IUserState> = {
      users: [
        { id: '1', name: 'John Doe' },
        { id: '2', name: 'Jane Smith' }
      ],
      isLoading: false,
      loadUsers: async () => {}
    };

    const { assertText } = await createFixture(
      '<user-list></user-list>',
      { id: 'app' },
      [
        UserList,
        { register: IUserState, useValue: mockUserState }
      ]
    ).started;

    assertText('John Doe');
    assertText('Jane Smith');
  });
});

Service Testing

// tests/unit/features/user/user-state.spec.ts
import { DI } from '@aurelia/kernel';
import { UserState } from '../../../../src/features/user/services/user-state';
import { IApiClient } from '../../../../src/shared/services/api';

describe('UserState', () => {
  it('should deduplicate concurrent requests', async () => {
    const container = DI.createContainer();
    const mockApi = {
      get: jest.fn().mockResolvedValue([{ id: '1', name: 'Test User' }])
    };

    container.register({ register: IApiClient, useValue: mockApi });
    const userState = container.get(UserState);

    // Make concurrent requests
    const [result1, result2] = await Promise.all([
      userState.loadUsers(),
      userState.loadUsers()
    ]);

    // Should only make one API call
    expect(mockApi.get).toHaveBeenCalledTimes(1);
    expect(userState.users).toHaveLength(1);
  });
});

Performance Optimization

Why Focus on Performance?

Large applications must consider performance from the start:

  • User Experience: Faster apps have better engagement and conversion

  • SEO Impact: Page speed affects search rankings

  • Mobile Users: Many users on slower connections or devices

  • Scalability: Performance problems compound as apps grow

Code Splitting with Dynamic Imports

Code splitting breaks your application into smaller chunks that load on demand:

// src/features/admin/index.ts
export async function configureAdminFeature(container: IContainer): Promise<void> {
  // Lazy load admin dependencies
  const [
    { AdminService },
    { AdminAnalytics },
    { AdminResources }
  ] = await Promise.all([
    import('./services/admin-service'),
    import('./services/admin-analytics'),
    import('./resources')
  ]);

  container.register(
    AdminService,
    AdminAnalytics,
    ...AdminResources
  );
}

Bundle Analysis

// package.json
{
  "scripts": {
    "analyze": "vite build --mode analyze",
    "analyze:stats": "vite-bundle-visualizer"
  }
}

Micro-Frontend Architecture

When to Use Micro-Frontends?

Consider micro-frontends when:

  • Multiple Teams: Different teams own different parts of the application

  • Independent Deployment: Need to deploy features independently

  • Technology Diversity: Teams want to use different frameworks/versions

  • Massive Scale: Application is too large for a single codebase

Trade-offs

Pros:

  • Team autonomy

  • Independent deployments

  • Fault isolation

  • Technology flexibility

Cons:

  • Increased complexity

  • Potential duplication

  • Cross-module communication challenges

  • Larger overall bundle size

Shell Application

// shell/src/main.ts
import { Aurelia } from 'aurelia';
import { ModuleFederationPlugin } from '@module-federation/enhanced';

const au = new Aurelia();

// Register remote modules
au.register({
  register(container: IContainer) {
    container.register(
      Registration.singleton(IRemoteModuleLoader, RemoteModuleLoader)
    );
  }
});

// Configure module federation
au.register(ModuleFederationPlugin.configure({
  name: 'shell',
  remotes: {
    userModule: 'userModule@http://localhost:3001/remoteEntry.js',
    productModule: 'productModule@http://localhost:3002/remoteEntry.js'
  }
}));

Remote Module

// user-module/src/bootstrap.ts
import { Aurelia } from 'aurelia';
import { IUserFeature } from './user-feature';

export async function mount(container: IContainer, config: RemoteConfig): Promise<void> {
  const childContainer = container.createChild();

  childContainer.register(
    IUserFeature,
    UserRoutes,
    UserResources
  );

  await childContainer.get(IUserFeature).activate(config);
}

Decision Guide: Which Architecture to Choose?

Single Repository

Choose when:

  • Small to medium team (< 20 developers)

  • Single deployable application

  • Rapid prototyping needed

  • Simpler deployment pipeline preferred

Monorepo

Choose when:

  • Multiple related applications

  • Significant code sharing needed

  • Large team with good tooling

  • Consistent standards important

Micro-Frontends

Choose when:

  • Very large organization (100+ developers)

  • Teams need full autonomy

  • Independent deployment critical

  • Different tech stacks required

Best Practices Summary

  1. Architecture Principles

    • Organize by features/domains, not technical layers

    • Use dependency injection for all services

    • Keep components focused on presentation

    • Implement proper separation of concerns

  2. State Management

    • Use singleton services for application state

    • Implement request deduplication for concurrent calls

    • Handle loading and error states consistently

    • Keep state close to where it's used

  3. Performance

    • Implement code splitting at route boundaries

    • Use dynamic imports for heavy dependencies

    • Monitor bundle sizes with analysis tools

    • Lazy load features when possible

  4. Type Safety

    • Use TypeScript interfaces for all services

    • Avoid any type - create specific types

    • Leverage DI interfaces for better abstraction

    • Use strict TypeScript configuration

  5. Testing

    • Test components with @aurelia/testing fixtures

    • Mock services through DI registration

    • Test state management logic separately

    • Focus on testing critical business logic and user workflows

  6. Code Organization

    • Use barrel exports for feature modules

    • Keep consistent file naming conventions

    • Group related functionality together

    • Maintain clear module boundaries

  7. Build & Deployment

    • Use modern build tools (Vite preferred)

    • Configure environment-specific settings

    • Implement proper code splitting

    • Monitor and optimize bundle sizes

By following these patterns and practices, you can build scalable, maintainable Aurelia 2 applications that grow with your team and business requirements. The key is to start with a solid foundation and evolve the architecture as needed while maintaining consistency across the codebase.

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