Best Practices

This section contains practical guides and best practices for building production-ready micro-frontend applications with qiankun. These guides are based on real-world experience and common challenges faced when implementing micro-frontend architectures.

🎯 Overview

Building micro-frontends requires careful consideration of various aspects including architecture design, performance optimization, development workflow, and deployment strategies. These guides will help you avoid common pitfalls and implement robust solutions.

📚 Available Guides

🎨 Style Isolation

Learn how to prevent CSS conflicts between micro applications and implement effective style isolation strategies.

What you'll learn:

• CSS isolation techniques
• Shadow DOM implementation
• CSS scoping strategies
• Runtime style conflict resolution
• Best practices for component libraries

⚡ Performance Optimization

Optimize your micro-frontend applications for better load times and runtime performance.

What you'll learn:

• Resource loading optimization
• Bundle splitting strategies
• Caching mechanisms
• Lazy loading techniques
• Performance monitoring

🛠️ Error Handling

Implement robust error handling and recovery mechanisms for micro-frontend applications.

What you'll learn:

• Error boundaries implementation
• Graceful degradation strategies
• Error monitoring and reporting
• Recovery mechanisms
• User experience considerations

🔍 Debugging & Development

Master debugging techniques and development workflows for micro-frontend applications.

What you'll learn:

• Development environment setup
• Debugging tools and techniques
• Hot reload configuration
• Cross-application debugging
• Production debugging strategies

🚀 Deployment Strategies

Learn deployment patterns and CI/CD strategies for micro-frontend applications.

What you'll learn:

• Independent deployment workflows
• Version management
• Rollback strategies
• Environment configuration
• Zero-downtime deployments

🔄 State Management

Implement effective state management across micro applications.

What you'll learn:

• Cross-application state sharing
• Event-driven communication
• State synchronization
• Data flow patterns
• Store management

🌐 Routing & Navigation

Design and implement navigation patterns for micro-frontend applications.

What you'll learn:

• Route configuration strategies
• Deep linking support
• Navigation guards
• History management
• SEO considerations

🔒 Security

Implement security best practices for micro-frontend architectures.

What you'll learn:

• Content Security Policy (CSP)
• Cross-origin resource sharing (CORS)
• Authentication and authorization
• Secure communication patterns
• Vulnerability prevention

🧪 Testing Strategies

Develop comprehensive testing strategies for micro-frontend applications.

What you'll learn:

• Unit testing micro applications
• Integration testing strategies
• End-to-end testing
• Visual regression testing
• Performance testing

📊 Monitoring & Analytics

Implement monitoring and analytics for micro-frontend applications.

What you'll learn:

• Performance monitoring
• Error tracking
• User analytics
• Application health checks
• Business metrics

🎯 Getting Started

If you're new to qiankun or micro-frontends, we recommend starting with these guides in order:

1. Style Isolation - Essential for preventing CSS conflicts
2. Error Handling - Critical for production stability
3. Performance Optimization - Important for user experience
4. Debugging & Development - Improves development productivity

🏗️ Common Patterns

Micro-Frontend Architecture Patterns

graph TB
    A[Main Application] --> B[User Management]
    A --> C[Product Catalog]
    A --> D[Shopping Cart]
    A --> E[Order Processing]
    
    B --> F[User Service]
    C --> G[Product Service]
    D --> H[Cart Service]
    E --> I[Order Service]
    
    F --> J[User Database]
    G --> K[Product Database]
    H --> L[Session Storage]
    I --> M[Order Database]

Communication Patterns

sequenceDiagram
    participant M as Main App
    participant A as Micro App A
    participant B as Micro App B
    participant S as Shared Store
    
    M->>A: Load & Mount
    A->>S: Subscribe to Events
    M->>B: Load & Mount
    B->>S: Subscribe to Events
    
    A->>S: Emit Event
    S->>B: Notify Event
    B->>S: Update State
    S->>A: Broadcast Update

🎪 Real-World Examples

E-commerce Platform

A typical e-commerce platform might be structured as:

• Main Application: Navigation, layout, user session
• Product Catalog: Browse and search products
• Shopping Cart: Manage cart items and checkout
• User Account: Profile management and order history
• Admin Panel: Content management and analytics

Enterprise Dashboard

An enterprise dashboard might include:

• Main Shell: Authentication and navigation
• Analytics Module: Business intelligence and reporting
• User Management: Role and permission management
• Content Management: Dynamic content editing
• Settings Module: System configuration

⚠️ Common Pitfalls

1. Over-Engineering

Problem: Creating too many micro applications for small features.

Solution: Start with a monolith and extract micro applications when teams or domains naturally separate.

2. Shared Dependencies

Problem: Micro applications sharing dependencies causing version conflicts.

Solution: Use proper bundling strategies and consider module federation for shared libraries.

3. Performance Issues

Problem: Multiple micro applications loading simultaneously causing performance degradation.

Solution: Implement lazy loading, proper caching, and resource optimization.

4. Testing Complexity

Problem: Testing micro applications in isolation doesn't catch integration issues.

Solution: Implement comprehensive integration testing alongside unit tests.

🔧 Development Workflow

Recommended Development Flow

1. Design Phase

   • Define application boundaries
   • Plan communication patterns
   • Design shared interfaces

2. Development Phase

   • Set up development environment
   • Implement micro applications
   • Configure build and deployment

3. Testing Phase

   • Unit test individual applications
   • Integration test the complete system
   • Performance and security testing

4. Deployment Phase

   • Deploy applications independently
   • Monitor application health
   • Implement rollback strategies

Team Organization

graph LR
    A[Platform Team] --> B[Shared Infrastructure]
    A --> C[Main Application]
    
    D[Feature Team 1] --> E[Micro App 1]
    F[Feature Team 2] --> G[Micro App 2]
    H[Feature Team 3] --> I[Micro App 3]
    
    B --> E
    B --> G
    B --> I

📖 Further Reading

• Micro Frontends Architecture
• Module Federation
• Single-SPA Documentation
• qiankun GitHub Repository

🤝 Contributing

Have a pattern or practice you'd like to share? Contributions to the cookbook are welcome! Please follow our contribution guidelines.

🔗 Related Documentation

• API Reference - Complete API documentation
• Quick Start Guide - Get started with qiankun
• Ecosystem - UI bindings and tools