Unable to require class in index file nodejs

Question

My config class: ProjectDir/classes/config.js

'use strict';
class config{
    getMongo(){
        var MongoClient = require('mongodb').MongoClient;
        MongoClient.connect('mongodb://127.0.0.1:27017/nodedb', (err, database) => {
            var db;
            if (err) return console.log(err)
            db = database;
            console.log('Connected to mongo');
        });
    }
}

module.exports = config;

My server.js file(here all routes are defined): ProjectDir/server.js

console.log('May Node be with you');
const express = require('express');
const app = express();
const bodyParser = require('body-parser');
app.use(bodyParser.urlencoded({extended: true}));

var configClass = require('./classes/config');//this is line 18
var config = new configClass();

Error:

SyntaxError: Invalid or unexpected token
    at createScript (vm.js:80:10)
    at Object.runInThisContext (vm.js:139:10)
    at Module._compile (module.js:588:28)
    at Object.Module._extensions..js (module.js:635:10)
    at Module.load (module.js:545:32)
    at tryModuleLoad (module.js:508:12)
    at Function.Module._load (module.js:500:3)
    at Module.require (module.js:568:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (D:\node\server.js:18:19)
[nodemon] app crashed - waiting for file changes before starting...

With out nodemon:

    >node server.js
    May Node be with you
D:\node\classes\config.js:1
(function (exports, require, module, __filename, __dirname) { ��'
    SyntaxError: Invalid or unexpected token
        at createScript (vm.js:80:10)
        at Object.runInThisContext (vm.js:139:10)
        at Module._compile (module.js:588:28)
        at Object.Module._extensions..js (module.js:635:
        at Module.load (module.js:545:32)
        at tryModuleLoad (module.js:508:12)
        at Function.Module._load (module.js:500:3)
        at Module.require (module.js:568:17)
        at require (internal/module.js:11:18)
        at Object.<anonymous> (D:\node\server.js:18:19)

Package.json

{
  "name": "node",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "dev": "nodemon server.js"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.18.2",
    "ejs": "^2.5.7",
    "express": "^4.16.2",
    "mongodb": "^2.2.33",
    "node-uuid": "^1.4.8",
    "swagger-tools": "^0.10.3"
  },
  "devDependencies": {
    "nodemon": "^1.12.1"
  }
}

I am new to node js, i am trying to make my code modular so i create a class called config.js i want to use this class in my index file where all of my routes are written. Please help!!

@wrangler I'm assuming he's pointing out that it's line 18 which is where the error is coming from maybe? — Elliot Blackburn
– Elliot Blackburn, Commented Nov 10, 2017 at 15:06
What about this, May Node be with you D:\node\classes\config.js:1 (function (exports, require, module, __filename, __dirname) { ��' — Abdul Moiz
– Abdul Moiz, Commented Nov 10, 2017 at 15:32
Ok, I can see a little space at the beginning of your config.js file. Is it the result of copy-pasting or do you have it in the actual file? If you do, then remove it, so the file starts with 'use strict';. Check all your files. I'm saying it because this (function (exports, require, module, __filename, __dirname) { ��' looks suspicious — Sebastian Kaczmarek
– Sebastian Kaczmarek, Commented Nov 10, 2017 at 15:43
This looks not like space, but some bytes that are invalid in the used encoding. Try another editor. — Bergi
– Bergi, Commented Nov 10, 2017 at 16:00

Marcel Djaman · Accepted Answer · 2017-11-10 16:17:45Z

0

Try this in server.js instead (not tested)

const express = require('express');
const app = express();
const bodyParser = require('body-parser');
app.use(bodyParser.urlencoded({extended: true}));

var { config } = require('./classes/config');//this is line 18
var config = new config();

answered Nov 10, 2017 at 16:17

Marcel Djaman

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4 Comments

Abdul Moiz Over a year ago

Its soo frustrating.. same issue. when i comment line 18 it works perfectly fine

Marcel Djaman Over a year ago

so try old fashion way instead with prototype. I must admit am new to es6 features

Marcel Djaman Over a year ago

take a look at stackoverflow.com/questions/42684177/…

Abdul Moiz Over a year ago

Yeah i went through this before posting this question.

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