node.js - Nodejs Winston logger - log output to both console and file -

i've written standard express server nodejs , winston logger. reason, log output written both console , designated log file.

every line in code:

winston.log('info', '**************************************'); 

is written both console , log file.

why happening?

he code:

var express = require('express'); var bodyparser = require('body-parser'); var mysql = require ('mysql'); var winston = require('winston');  var app = express();  //init winston logger, max file size 5mb 10 file retention winston.add(winston.transports.file, { filename: './logs/eclipse_server.log', level: 'info',handleexceptions: true,             maxsize: 5242880,maxfiles: 10});  winston.log('info', '**************************************'); winston.log('info', 'eclipse web server - start process'); winston.log('info', 'express server mode initialized');                  winston.log('info', 'initialize database connection'); var connection = mysql.createconnection({     host: '127.0.0.1',     user: 'root',     password: '12345678',     database: 'project_eclipse',     port: 3306 });      winston.log('info', 'database connection initialized');     winston.log('info', 'database connection attempted');     connection.connect(function(err){     if(!err) {          winston.log('info', 'database connection success - connected');      } else {         winston.log('error', 'database connection - failed');            winston.log('error', err);     }     });    // instruct app use `bodyparser()` middleware routes  winston.log('info', 'using bodyparser()');   app.use(bodyparser()); winston.log('info', 'using bodyparser.text()');  app.use(bodyparser.text()); winston.log('info', 'initialize html directory'); app.use(express.static(__dirname + '/public')); winston.log('info', 'initialized html directory');  app.post('/', function(request, response){     winston.log('info', 'in game post login request recieved');     var usr = request.body.usr;     var pass = request.body.pass;      //var client_ip = req.header('x-forwarded-for') || req.connection.remoteaddress;      winston.log('info', 'login request recieved  '+usr);      connection.query('select * eclipse_users username=? , password = md5(?)', [ usr, pass ], function(err, rows, fields) {        if (!err)       {         var n_rows = rows.length;          if(n_rows==1)          {                //user exists             winston.log('info', 'user exists - response send');             response.json({msg:'user exists'});             winston.log('info', 'user exists - response sent');          }         else         {             //user not found             winston.log('info', 'user not found - response send');             response.json({msg:'user not exist'});             winston.log('info', 'user not found - response sent');         }       }      else         //sql query error         {         winston.log('error', 'error while performing select query');             winston.log('error', err);         connection.end();}       }); });  app.post('/weblogin', function(request, response){      winston.log('info', 'web post login request recieved');     var usr = request.body.usr;     var pass = request.body.password;      //var client_ip = req.header('x-forwarded-for') || req.connection.remoteaddress;      winston.log('info', 'login request recieved  '+usr);      connection.query('select * eclipse_users username=? , password = md5(?)', [ usr, pass ], function(err, rows, fields) {        if (!err)       {         var n_rows = rows.length;          if(n_rows==1)          {             //user exists             winston.log('info', 'user exists - response send');             response.send('1');             winston.log('info', 'user exists - response sent');          }         else{             //user not exist             winston.log('info', 'user not found - response send');             response.send('0');             winston.log('info', 'user not found - response sent');         }     }       else         //sql query error         {         winston.log('error', 'error while performing select query');             winston.log('error', err);         connection.end();}       }); });  app.post('/myaction', function(request, response) {    winston.log('info', 'web post register user request recieved');     var usr = request.body.username;     var pass = request.body.pass;     var uemail = request.body.mail;      winston.log('info', 'preparing sql query');     var check = connection.query('insert eclipse_users (username, password,email) values (?, md5(?),?)', [ usr, pass,uemail ], function(err,result) {      if (!err)     {         winston.log('info', 'new user registered');         response.send('user registered');}     else     {         winston.log('error', 'err');         response.send('error');     }      });  });  winston.log('info', 'binding port 80 on ip 172.31.16.218'); app.listen(80,"172.31.16.218"); winston.log('info', 'server running @ http://172.31.16.218:80'); 

winston adds console transport by default. if don't want log console have 2 options.

remove it:

winston.remove(winston.transports.console); 

or instantiate own logger:

var logger = new (winston.logger)({     transports: [       new (winston.transports.file)({ filename: 'somefile.log' })     ]   }); 

and use new logger:

logger.log('info', "this won't printed console");