how to run a query SQL in node.js mysql -

i have syntax problem in module, fail sql query.

i initialize module database in file.js, responds console.log 'connected database', sends data module in database.newdata(data), when enters in runquery nothing happens, no errors or result, nothing!

i in runquery if query ok , if this, think happens there error in logic of node, idea connect database , use runquery run query pass.

file.js

var db = require('./modules/database'); var database = new db();  database.newdata(data); 

database.js

var mysql = require('mysql'),     queries = require('./queries'),     connection;  var db = function(){     var db_config = {         host: 'localhost',         user: 'diegoug',         password: 'qwertyuiop',         database: 'test'     };      connection = mysql.createconnection(db_config);      connection.connect(function(err) {         if(err) {             console.log('error when connecting database:', err);         }         console.log('connected database');     }); }  db.prototype.runquery = function(query,data,cb){     // here not pass nothing     connection.query(         query,         data,         function(err, results){             debugger;             if (err)throw err;             cb(results);         }     );     // here if query written , if is, happens it's not running in connection }  db.prototype.newdata = function(data){     var query = queries.sqlnewdata,         data  = [data];     var res   = this.runquery(query,data);     console.log(res); }  module.exports = db;