用express和body-parser安装服务器

Question

我想用Express和Body-Parser设置一个服务器。我做了：

npm init -y

npm install express body-parser --save

{
  "name": "myapp",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.18.2",
    "express": "^4.16.2"
  }
}

const express = require(‘express’);
const bodyParser = require(‘body-parser’);
const app = express();
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.listen(3000, () => console.log(‘Webhook server is listening, port 3000’));

我得到了这个错误：

（函数（exports,require,module,__filename,__dirname）{const express=require('express')；^

SyntaxError：在object.runinthiscontext(VM.js:80:10)处的createScript(VM.js:139:10)处的module._compile(module.js:607:28)处的module._compile(module.js:654:10)处的module.js:556:32)处的module.load（module.js:499:12)处的tryModuleLoad（module.js:499:10)处的module.js:684:10)处的startup处的

有什么问题？我不明白，这是我第一次使用Node.js

Answer 1

将'和'更改为单引号'，它将工作：

const express = require('express');
const bodyParser = require('body-parser');
const app = express();
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.listen(3000, () => console.log('Webhook server is listening, port 3000'));

通过控制台运行：

$ node index.js
Webhook server is listening, port 3000