Express.js Web Framework
Build robust web applications and APIs with Express.js and Node.js ecosystem
# Express Nodejs
This document provides comprehensive guidelines for express nodejs development and best practices.
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## Express.js Fundamentals
1. **Application**
- Application and router setup
- Implement proper application and router setup
- Follow best practices for optimal results
2. **Middleware**
- Middleware function architecture
- Implement proper middleware function architecture
- Follow best practices for optimal results
3. **Request**
- Request and response object handling
- Implement proper request and response object handling
- Follow best practices for optimal results
4. **Route**
- Route parameter and query parsing
- Implement proper route parameter and query parsing
- Follow best practices for optimal results
5. **Error**
- Error handling middleware
- Implement proper error handling middleware
- Follow best practices for optimal results
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## Routing & Middleware
6. **Route**
- Route definitions and methods
- Implement proper route definitions and methods
- Follow best practices for optimal results
7. **Route**
- Route parameters and wildcards
- Implement proper route parameters and wildcards
- Follow best practices for optimal results
8. **Middleware**
- Middleware execution order
- Implement proper middleware execution order
- Follow best practices for optimal results
9. **Custom**
- Custom middleware development
- Implement proper custom middleware development
- Follow best practices for optimal results
10. **Third-party**
- Third-party middleware integration
- Implement proper third-party middleware integration
- Follow best practices for optimal results
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## API Development
11. **RESTful**
- RESTful API design principles
- Implement proper restful api design principles
- Follow best practices for optimal results
12. **CRUD**
- CRUD operation implementation
- Implement proper crud operation implementation
- Follow best practices for optimal results
13. **JSON**
- JSON request/response handling
- Implement proper json request/response handling
- Follow best practices for optimal results
14. **API**
- API versioning strategies
- Implement proper api versioning strategies
- Follow best practices for optimal results
15. **OpenAPI**
- OpenAPI documentation
- Implement proper openapi documentation
- Follow best practices for optimal results
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## Request Handling
16. **Body**
- Body parsing (JSON, form data, files)
- Implement proper body parsing (json, form data, files)
- Follow best practices for optimal results
17. **Query**
- Query string and parameter extraction
- Implement proper query string and parameter extraction
- Follow best practices for optimal results
18. **Header**
- Header manipulation
- Implement proper header manipulation
- Follow best practices for optimal results
19. **Cookie**
- Cookie and session management
- Implement proper cookie and session management
- Follow best practices for optimal results
20. **Request**
- Request validation and sanitization
- Implement proper request validation and sanitization
- Follow best practices for optimal results
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## Response Management
21. **Response**
- Response status codes and messages
- Implement proper response status codes and messages
- Follow best practices for optimal results
22. **JSON**
- JSON and HTML response formatting
- Implement proper json and html response formatting
- Follow best practices for optimal results
23. **File**
- File downloads and streaming
- Implement proper file downloads and streaming
- Follow best practices for optimal results
24. **Response**
- Response caching headers
- Implement proper response caching headers
- Follow best practices for optimal results
25. **Error**
- Error response standardization
- Implement proper error response standardization
- Follow best practices for optimal results
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## Authentication & Security
26. **JWT**
- JWT token authentication
- Implement proper jwt token authentication
- Follow best practices for optimal results
27. **Session-based**
- Session-based authentication
- Implement proper session-based authentication
- Follow best practices for optimal results
28. **Password**
- Password hashing and validation
- Implement proper password hashing and validation
- Follow best practices for optimal results
29. **CORS**
- CORS configuration
- Implement proper cors configuration
- Follow best practices for optimal results
30. **Security**
- Security middleware (helmet, rate limiting)
- Implement proper security middleware (helmet, rate limiting)
- Follow best practices for optimal results
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## Database Integration
31. **MongoDB**
- MongoDB with Mongoose
- Implement proper mongodb with mongoose
- Follow best practices for optimal results
32. **PostgreSQL**
- PostgreSQL with Sequelize/Prisma
- Implement proper postgresql with sequelize/prisma
- Follow best practices for optimal results
33. **MySQL**
- MySQL connection and querying
- Implement proper mysql connection and querying
- Follow best practices for optimal results
34. **Redis**
- Redis for caching and sessions
- Implement proper redis for caching and sessions
- Follow best practices for optimal results
35. **Database**
- Database connection pooling
- Implement proper database connection pooling
- Follow best practices for optimal results
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## Testing Strategies
36. **Unit**
- Unit testing with Jest
- Implement proper unit testing with jest
- Follow best practices for optimal results
37. **Integration**
- Integration testing with Supertest
- Implement proper integration testing with supertest
- Follow best practices for optimal results
38. **API**
- API endpoint testing
- Implement proper api endpoint testing
- Follow best practices for optimal results
39. **Mock**
- Mock database operations
- Implement proper mock database operations
- Follow best practices for optimal results
40. **Test**
- Test environment setup
- Implement proper test environment setup
- Follow best practices for optimal results
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## Error Handling
41. **Global**
- Global error handling middleware
- Implement proper global error handling middleware
- Follow best practices for optimal results
42. **Custom**
- Custom error classes
- Implement proper custom error classes
- Follow best practices for optimal results
43. **Async**
- Async error handling
- Implement proper async error handling
- Follow best practices for optimal results
44. **Error**
- Error logging and monitoring
- Implement proper error logging and monitoring
- Follow best practices for optimal results
45. **Graceful**
- Graceful error responses
- Implement proper graceful error responses
- Follow best practices for optimal results
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## Performance Optimization
46. **Response**
- Response compression (gzip)
- Implement proper response compression (gzip)
- Follow best practices for optimal results
47. **Caching**
- Caching strategies
- Implement proper caching strategies
- Follow best practices for optimal results
48. **Database**
- Database query optimization
- Implement proper database query optimization
- Follow best practices for optimal results
49. **Memory**
- Memory leak prevention
- Implement proper memory leak prevention
- Follow best practices for optimal results
50. **Cluster**
- Cluster mode for scaling
- Implement proper cluster mode for scaling
- Follow best practices for optimal results
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## Template Engines
51. **EJS**
- EJS template rendering
- Implement proper ejs template rendering
- Follow best practices for optimal results
52. **Handlebars**
- Handlebars integration
- Implement proper handlebars integration
- Follow best practices for optimal results
53. **Pug**
- Pug template engine
- Implement proper pug template engine
- Follow best practices for optimal results
54. **Static**
- Static file serving
- Implement proper static file serving
- Follow best practices for optimal results
55. **Asset**
- Asset management
- Implement proper asset management
- Follow best practices for optimal results
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## WebSocket Integration
56. **Socket.IO**
- Socket.IO implementation
- Implement proper socket.io implementation
- Follow best practices for optimal results
57. **Real-time**
- Real-time communication
- Implement proper real-time communication
- Follow best practices for optimal results
58. **WebSocket**
- WebSocket authentication
- Implement proper websocket authentication
- Follow best practices for optimal results
59. **Room**
- Room and namespace management
- Implement proper room and namespace management
- Follow best practices for optimal results
60. **Event-driven**
- Event-driven architecture
- Implement proper event-driven architecture
- Follow best practices for optimal results
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## Deployment & Production
61. **Environment**
- Environment configuration
- Implement proper environment configuration
- Follow best practices for optimal results
62. **Process**
- Process management with PM2
- Implement proper process management with pm2
- Follow best practices for optimal results
63. **Docker**
- Docker containerization
- Implement proper docker containerization
- Follow best practices for optimal results
64. **Cloud**
- Cloud deployment (AWS, Heroku)
- Implement proper cloud deployment (aws, heroku)
- Follow best practices for optimal results
65. **Monitoring**
- Monitoring and logging
- Implement proper monitoring and logging
- Follow best practices for optimal results
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## Advanced Features
66. **Custom**
- Custom middleware development
- Implement proper custom middleware development
- Follow best practices for optimal results
67. **Plugin**
- Plugin architecture
- Implement proper plugin architecture
- Follow best practices for optimal results
68. **Microservices**
- Microservices integration
- Implement proper microservices integration
- Follow best practices for optimal results
69. **API**
- API gateway patterns
- Implement proper api gateway patterns
- Follow best practices for optimal results
70. **Event-driven**
- Event-driven programming
- Implement proper event-driven programming
- Follow best practices for optimal results
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## Security Best Practices
71. **Input**
- Input validation and sanitization
- Implement proper input validation and sanitization
- Follow best practices for optimal results
72. **SQL**
- SQL injection prevention
- Implement proper sql injection prevention
- Follow best practices for optimal results
73. **XSS**
- XSS protection
- Implement proper xss protection
- Follow best practices for optimal results
74. **CSRF**
- CSRF token implementation
- Implement proper csrf token implementation
- Follow best practices for optimal results
75. **Secure**
- Secure headers configuration
- Implement proper secure headers configuration
- Follow best practices for optimal results
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## Development Tools
76. **Nodemon**
- Nodemon for development
- Implement proper nodemon for development
- Follow best practices for optimal results
77. **Debug**
- Debug module for logging
- Implement proper debug module for logging
- Follow best practices for optimal results
78. **ESLint**
- ESLint and Prettier setup
- Implement proper eslint and prettier setup
- Follow best practices for optimal results
79. **Hot**
- Hot reload configuration
- Implement proper hot reload configuration
- Follow best practices for optimal results
80. **API**
- API testing with Postman
- Implement proper api testing with postman
- Follow best practices for optimal results
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## Summary Checklist
- [ ] Core principles implemented
- [ ] Best practices followed
- [ ] Performance optimized
- [ ] Security measures in place
- [ ] Testing strategy implemented
- [ ] Documentation completed
- [ ] Monitoring configured
- [ ] Production deployment ready
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Follow these comprehensive guidelines for successful express nodejs implementation.