Create route files:

Create a "routes" folder in the root of your project.
Inside the "routes" folder, create a file named "products.js" for product-related routes.
Define the routes in "products.js":

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// routes/products.js
const express = require('express');
const router = express.Router();

// Define routes
router.get('/', (req, res) => {
  // Logic to handle GET request for fetching all products
});

router.get('/:id', (req, res) => {
  // Logic to handle GET request for fetching a specific product by ID
});

router.post('/', (req, res) => {
  // Logic to handle POST request for creating a new product
});

router.put('/:id', (req, res) => {
  // Logic to handle PUT request for updating a specific product by ID
});

router.delete('/:id', (req, res) => {
  // Logic to handle DELETE request for deleting a specific product by ID
});

// Export the router
module.exports = router;
Include the routes in the main Express app (app.js):
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// app.js
const express = require('express');
const bodyParser = require('body-parser');
const productsRoutes = require('./routes/products'); // Import the products routes

const app = express();
const PORT = process.env.PORT || 3000;

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));

// Use the products routes
app.use('/products', productsRoutes);

// Start the server
app.listen(PORT, () => {
  console.log(`Server is running on port ${PORT}`);
});






With this setup, the product-related routes defined in "products.js" will be accessible under the base URL "/products" in your Express app. For example, the route handling the GET request for fetching all products will be available at "/products/" (assuming your app is running on port 3000). Similarly, other routes will follow the "/products/:id" pattern.