javascript - Node script doesn't ever end -

i have node script below copy contents of files , insert them mongo.

the script never seems end , though data gets inserted successfully, have ctrl+c kill it.

is there i'm supposed use in node.js end script?

var mongoose = require('mongoose'); mongoose.connect('mongodb://localhost/testdb'); var dir = './seeds'; var db = mongoose.connection;  // show connection error if there 1 db.on('error', console.error.bind(console, 'database connection error:'));  // if connected mongo db.once('open', function callback() {      var fs = require('fs'); // used files in directory      // read files in folder     fs.readdir(dir, function(err, list) {          // log error if went wrong         if(err) {             console.log('error: '+err);         }          // every file in list         list.foreach(function(file) {              // set filename without extension variable collection_name             var collection_name = file.split(".")[0];             var parsedjson = require(dir + '/' + file);              for(var = 0; < parsedjson.length; i++) {                  // counts number of records in collection                 db.collection('cohort').count(function(err, count) {                     if(err) {                         console.log(err);                     }                 });                  db.collection(collection_name).insert(parsedjson[i], function(err, records) {                      if(err) {                         console.log(err);                     }                      console.log(records[0]);                     console.log("record added "+records[0]);                  });             }          });     }); }); 

when done, call mongoose.disconnect(). @aarondufour correctly points out, node not exit while event handler callbacks registered because doesn't know no more events expected, connection emitting 'close' or 'error' event, example.