Express.js : express()不是函数错误

Question

我正在学习express并从终端运行代码给出错误，下面是我的代码和终端错误提示

const express = require("express");
const app = express();
app.listen(3000);

航站楼说：

ReferenceError: require is not defined in ES module scope, you can use import instead
This file is being treated as an ES module because it has a '.js' file extension and 'C:\Users\ENIOLA YUSUFF\desktop\my-express-server\package.json' contains "type": "module". To treat it as a CommonJS script, rename it to use the '.cjs' file extension.
    at file:///C:/Users/ENIOLA%20YUSUFF/desktop/my-express-server/server.js:5:17    
←[90m    at ModuleJob.run (node:internal/modules/esm/module_job:197:25)←[39m        
    at async Promise.all (index 0)
←[90m    at async ESMLoader.import (node:internal/modules/esm/loader:337:24)←[39m   
←[90m    at async loadESM (node:internal/process/esm_loader:88:5)←[39m
←[90m    at async handleMainPromise (node:internal/modules/run_main:61:12)←[39m 

我试着使用下面的代码，认为这是节点版本的差异，但它解决了一半的问题。

import * as express from "express";
const app = express();
app.listen(3000);

终端错误：

$ node server.js
file:///C:/Users/ENIOLA%20YUSUFF/desktop/my-express-server/server.js:2
const app = express();
            ^

TypeError: express is not a function
    at file:///C:/Users/ENIOLA%20YUSUFF/desktop/my-express-server/server.js:2:13    
    at ModuleJob.run (node:internal/modules/esm/module_job:197:25)
    at async Promise.all (index 0)
    at async ESMLoader.import (node:internal/modules/esm/loader:337:24)
    at async loadESM (node:internal/process/esm_loader:88:5)
    at async handleMainPromise (node:internal/modules/run_main:61:12)

Answer 1

文件中可能有"type": "module"。这就是为什么您必须使用import而不是require。

您应该能够使用import express from "express"使其工作。

Answer 2

试试这个：

import express from 'express';

const app = express();