L9. 🛠️ Node.js + Express – CRUD Operations

// CRUD OPERATIONS 🧩
// C = Create | R = Read | U = Update | D = Delete

// Creating server using Express ⚙️
import express from 'express';

const app = express(); // express app instance

// C = Create => POST method (e.g., posting pic on Instagram 📸)
// R = Read   => GET method  (e.g., seeing posts on Instagram 👀)
// U = Update => PUT method  (e.g., editing a post ✏️)
// D = Delete => DELETE method (e.g., deleting a post ❌)

// To handle each operation, we use specific HTTP methods 🔁

// Read data (GET request) 📥
app.get('/get', (req, res) => {
    res.send("GET request");
});

// Create data (POST request) ➕
app.post('/post', (req, res) => {
    res.send("POST request");
});

// You can later add PUT and DELETE here for full CRUD

// Run the server on port 2000 🚪
const port = 2000;
app.listen(port, () => console.log(`Server is running on port ${port}`));

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✨ Explanation

• Express.js makes it easier to handle HTTP methods like GET, POST, PUT, DELETE.

• app.get() handles reading data (like viewing posts).

• app.post() handles creating data (like uploading a photo).

• You can add app.put() and app.delete() for full CRUD.

• CRUD is the basic of any backend system and is used in almost every app.