javascript - 类型错误 : express is not a function -

Question

express 代码“const app = express()”不起作用!!
** 嗨，我这里有一些问题!我的控制台返回此错误，但我遵循最好的方法!请某人
给我一盏灯。
server.js 存档:

import * as express from "express";
import * as mongoose from "mongoose";
//inciando o app
const app = express();

//iniciando o banco de dados
mongoose.connection('mongodb://localhost:27017/program01', {useNewUrlParser: true});

//primeira rota
app.get('/',(req,res)=>{
    res.send('Hello World')
})

app.listen(3000)


==============================
console: 

*[nodemon] restarting due to changes...
[nodemon] starting `node server.js`
[nodemon] restarting due to changes...
(node:12020) ExperimentalWarning: The ESM module loader is experimental.
[nodemon] starting `node server.js`
(node:8472) ExperimentalWarning: The ESM module loader is experimental.
file:///C:/Users/USUARIO/Documents/Project%20Web/program01/server.js:4
const app = express();
            ^

TypeError: express is not a function
    at file:///C:/Users/USUARIO/Documents/Project%20Web/program01/server.js:4:13        
    at ModuleJob.run (internal/modules/esm/module_job.js:137:37)
    at async Loader.import (internal/modules/esm/loader.js:179:24)
[nodemon] app crashed - waiting for file changes before starting...* ```


another's archives :
**node_modules**
**package.json**
**package-lock.json**
**yarn-error.log**

Answer 1

您需要对 express 使用默认导入， IE。

import express from 'express';

代替

import * as express from 'express';