objects vs prototypes

index.js

// prototype style (more advanced)
function DB() {}
DB.prototype.open = function() {}
DB.prototype.close = function() {}
DB.prototype.query = function() {}

function connectToDB() {
  return new DB()
}

// object style (simpler)
function connectToDB() {
  return {
    open: function() {},
    close: function() {},
    query: function() {}
  }
}

// with both the external API is the same
var db = connectToDB()
db.open()
db.query()