MERN Stack Development

  1. Full-Stack Integration
    1. HTTP Communication
      1. Fetch API
        1. Basic Fetch Usage
          1. Request Configuration
            1. Response Handling
              1. Error Handling
              2. Axios Library
                1. Axios Installation
                  1. Request Methods
                    1. Interceptors
                      1. Global Configuration
                      2. Async Operations
                        1. Promise Handling
                          1. Async/Await Syntax
                            1. Error Boundaries
                          2. CORS Configuration
                            1. Same-Origin Policy
                              1. Security Implications
                                1. Cross-Origin Restrictions
                                2. CORS Headers
                                  1. Access-Control-Allow-Origin
                                    1. Access-Control-Allow-Methods
                                      1. Access-Control-Allow-Headers
                                      2. CORS Middleware
                                        1. Express CORS Setup
                                          1. CORS Options
                                            1. Preflight Requests
                                          2. Authentication System
                                            1. Password Security
                                              1. Password Hashing
                                                1. Salt Generation
                                                  1. bcrypt Usage
                                                  2. JSON Web Tokens
                                                    1. JWT Structure
                                                      1. Token Creation
                                                        1. Token Verification
                                                          1. Token Expiration
                                                          2. Authentication Flow
                                                            1. User Registration
                                                              1. User Login
                                                                1. Token Storage
                                                                  1. Token Refresh
                                                                  2. Authorization
                                                                    1. Role-Based Access
                                                                      1. Permission Systems
                                                                        1. Protected Resources
                                                                        2. Frontend Authentication
                                                                          1. Login Components
                                                                            1. Authentication Context
                                                                              1. Route Protection
                                                                                1. Token Management
                                                                              2. Data Flow Architecture
                                                                                1. Client-Server Communication
                                                                                  1. Request-Response Cycle
                                                                                    1. Data Synchronization
                                                                                      1. State Management
                                                                                      2. API Design
                                                                                        1. Endpoint Structure
                                                                                          1. Data Formats
                                                                                            1. Error Responses
                                                                                            2. Real-Time Communication
                                                                                              1. WebSocket Integration
                                                                                                1. Server-Sent Events
                                                                                                  1. Socket.io Implementation

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                                                                                              8. Testing and Quality Assurance