how to connect to a database in mongodb code example

Example 1: connect to mongo database

mongoose.connect(mongoURI);

Example 2: how to connect mongodb with node js

async function main(){
    /**
     * Connection URI. Update <username>, <password>, and <your-cluster-url> to reflect your cluster.
     * See https://docs.mongodb.com/ecosystem/drivers/node/ for more details
     */
    const uri = "mongodb+srv://<username>:<password>@<your-cluster-url>/test?retryWrites=true&w=majority";
 

    const client = new MongoClient(uri);
 
    try {
        // Connect to the MongoDB cluster
        await client.connect();
 
        // Make the appropriate DB calls
        await  listDatabases(client);
 
    } catch (e) {
        console.error(e);
    } finally {
        await client.close();
    }
}

main().catch(console.error);

Example 3: connect to mongodb

const MongoClient = require('mongodb').MongoClient

Example 4: how to connect mongodb and nodejs

const {MongoClient} = require('mongodb');