MongoDB and NodeJS

node_mgd_conn.js

var mongo = require('mongodb')

var Server = mongo.Server
  , Db = mongo.Db
  , BSON = mongo.BSONPure

var server = new Server('localhost', 27017, {auto_reconnect: true})
  , db = new Db('dbName', server)

db.open(function(err, db) {
  if (!err) {
    console.log('Connected to "dbName" database')
    db.collection('collName', {strict: true}, function(err, collection) {
      if (err) {
        // if collName collection does not exist,
        // do something about it here (i.e, recreate one, return err, etc.)
      }
    })
  }
})