Nodejs How to MongoDB database

Nodejs link MongoDB database in two ways, the first is to use the official self-developed NPM package MongoDB Link, the second is the use of third-party NPM package Mongoose link;
If this is a window operating system, it is recommended to use Mongoose
First, MongoDB Link:

First install the MongoDB package in the project:

NPM Install MongoDB

After the installation is successful, create a mongodb.js file and write the code:

var mongo = require (' MongoDB '),    = MONGO. Server,    = MONGO. Db; var New true }); var New Db (' foo ', server);d b.open (function(err, db) {    if(!  ERR) {         console.log ("We are connected");    });

Use node to run this JS file:

Node Mongodb.js

This is the hint we can see: We areconnected

This information is also exported in the log:

This is where we're already linked to the database.

The second kind, Mongoos link:

This is simpler and less code

or download the NPM installation package first:

NPM Install Mongoose

After the installation is successful, create a mongoose.js file and write the code:

var mongoose = require (' Mongoose '); Mongoose.connect (// database connected to a test

Here Sslpdzb is the name of the specific collection

Use node to run this JS file:

Node Mongooose.js

The results of the operation are as follows:

The log will also output a message:

Finish....

Nodejs How to MongoDB database