Creating a MongoDB database in Node.js is super simple — MongoDB creates a database automatically when you insert data into it! 😎

Let’s walk through it using both:

1. ✅ Native MongoDB Driver

2. 🪄 Mongoose (an ODM – Object Data Modeling tool)

✅ 1. Using Native MongoDB Driver

📦 Step 1: Install the MongoDB Driver

bash
npm install mongodb

⚙️ Step 2: Create a Database and Collection

js
const client = new MongoClient(uri);async function createDatabase() {  try {    await client.connect();    // Create (or get) the database    const db = client.db('myNewDatabase');    // Create (or get) the collection    const collection = db.collection('users');    // Insert a document to trigger DB + collection creation    await collection.insertOne({ name: 'Alice', age: 25 });    console.log('Database and collection created with one document!');  } catch (err) {    console.error(err);  } finally {    await client.close();  }}createDatabase();

📝 MongoDB does not create the database until you insert something.

🪄 2. Using Mongoose (easier & structured)

📦 Step 1: Install Mongoose

bash
npm install mongoose

⚙️ Step 2: Define Schema and Save Data

js
const mongoose = require('mongoose');// Connect to DB (MongoDB will create it if it doesn't exist)mongoose.connect('mongodb://localhost:27017/myNewDatabase')  .then(() => console.log('Connected to MongoDB!'))  .catch(err => console.error(err));// Define schemaconst userSchema = new mongoose.Schema({  name: String,  age: Number});// Create modelconst User = mongoose.model('User', userSchema);// Insert a user (this creates the DB & collection)const newUser = new User({ name: 'Bob', age: 30 });newUser.save().then(() => {  console.log('User saved and database created!');  mongoose.disconnect();});

📌 Summary

Want to go further? I can help you:

• Build a full REST API using MongoDB

• Connect to MongoDB Atlas (cloud)

• Do CRUD operations or relationships (like joins via populate)