无法在索引文件nodejs中要求类
我的configuration类：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; 我的server.js文件（这里定义了所有路由）：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();
错误：
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...
有了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)
的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" } }
我是节点js的新手，我想让我的代码模块化，所以我创build一个名为config.js的类，我想在我的索引文件中使用这个类，我所有的路线写入。 请帮忙！！
尝试在server.js而不是（未经testing）
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();