How ranjithmca17/mern_crud works
This is a product-catalog CRUD application: users browse products, create or edit records, view a product route, and delete records after confirmation. The frontend routes pages through shared product state and service calls to an Express API; API handlers use the Product model for persistence. The graph shows the principal request path and error-handling setup. Some backend details and the view page were not excerpted, so their internal behavior is not expanded beyond documented wiring.
Main entry points: App.tsx Route application · ProductContext.tsx Product state · app.js Express API setup · ProductListPage.tsx Product list
Components 19
Frontend experience
- Route application
Frontend/src/App.tsx - Product list
Frontend/src/Pages/products/ProductListPage.tsx - Create product
Frontend/src/Pages/products/CreateProductPage.tsx - Edit product
Frontend/src/Pages/products/EditProductPage.tsx - View product
Frontend/src/Pages/products/ViewProductPage.tsx - Delete confirmation
Frontend/src/components/DeleteConfirmModal.tsx
Product state and API client
- Product state
Frontend/src/context/ProductContext.tsx - Product types
Frontend/src/types/product.types.ts - Product service
Frontend/src/services/productService.ts - HTTP client
Frontend/src/services/api.ts
Backend API
- Express API setup
backend/app.js - Product routes
backend/src/routes/productRoutes.js - Product handlers
backend/src/controllers/productController.js - Not-found middleware
backend/src/middleware/notFound.js - Error handler
backend/src/middleware/errorHandler.js - Server startup
backend/Server.js
Product persistence
- Database connection
backend/src/config/db.js - Product model
backend/src/models/Product.js
Other components
- Catalog user
Connections 21
- Catalog user → Route application: uses
- Route application → Product list: routes to
Frontend/src/App.tsx - Route application → Create product: routes to
Frontend/src/App.tsx - Route application → Edit product: routes to
Frontend/src/App.tsx - Route application → View product: routes to
Frontend/src/App.tsx - Product list → Product state: fetches and deletes
Frontend/src/Pages/products/ProductListPage.tsx - Product list → Delete confirmation: renders
Frontend/src/Pages/products/ProductListPage.tsx - Create product → Product state: creates through
Frontend/src/Pages/products/CreateProductPage.tsx - Edit product → Product state: loads and updates
Frontend/src/Pages/products/EditProductPage.tsx - Product state → Product service: calls
Frontend/src/context/ProductContext.tsx - Product state → Product types: uses
Frontend/src/context/ProductContext.tsx - Product service → HTTP client: sends requests via
Frontend/src/services/productService.ts - HTTP client → Product routes: requests product endpoints
- Server startup → Express API setup: starts
backend/Server.js - Server startup → Database connection: connects before serving
backend/Server.js - Express API setup → Product routes: mounts
backend/app.js - Express API setup → Not-found middleware: registers
backend/app.js - Express API setup → Error handler: registers
backend/app.js - Product routes → Product handlers: dispatches to
backend/src/routes/productRoutes.js - Product handlers → Product model: queries
backend/src/controllers/productController.js - Not-found middleware → Error handler: passes errors to