module.exports = function(dir, callback) {

  const fs = require('fs');

  fs.watch(dir, function(event, file) {

    var extencion = file.split('.')[1];

    if (extencion == 'txt' && event == 'change') {

      fs.readFile(dir + '\\' + file, 'utf8', function(err , fileString) {

        callback(event, fileString);
      });
    }

  });

};