Count total number of databases present in MongoDB using Node.js

MongoDB, the most popular NoSQL database, is an open-source document-oriented database. The term ‘NoSQL’ means ‘non-relational’. It means that MongoDB isn’t based on the table-like relational database structure but provides an altogether different mechanism for storage and retrieval of data. This format of storage is called BSON( similar to JSON format).

MongoDB Module: This module of Node.js is used for connecting the MongoDB database as well as used for manipulating the collections and databases in MongoDB. The mongodb.connect() method is used for connecting the MongoDB database which is running on a particular server on your machine. (Refer to this article). 

Installing Module:

npm install mongodb

Project Structure:

Running Server on Local IP: Data is the directory where MongoDB server is present.

mongod --dbpath=data --bind_ip 127.0.0.1

MongoDB Databases:

Filename- index.js:

// Requiring module
const MongoClient = require("mongodb");

// Connection URL
const url = 'mongodb://localhost:27017/';

// Database name
const databasename = "GFG";

MongoClient.connect(url).then((client) => {

    // Use admin request
    const connect = client.db(databasename).admin();

    connect.listDatabases((err, db) => {
        if (!err) {
            var count = 0;
            db.databases.forEach(element => {
                ++count;
            });

            // Printing total count
            console.log("TotalDatabases " + count);
        }
    })
}).catch((err) => {

    // Printing the error message 
    console.log(err.Message);
})

 Run index.js file using the following command:

node index.js

Output: