javascript - 类型错误 : Cannot read properties of undefined (reading 'prototype' ) React Typescript + Express

Question

我正在尝试在我的 React-Typescript SPA 中使用 express。但它给了我错误:

    TypeError: Cannot read properties of undefined (reading 'prototype')
(anonymous function)
node_modules/express/lib/response.js:42
  39 |  * @public
  40 |  */
  41 | 
> 42 | var res = Object.create(http.ServerResponse.prototype)
  43 | 
  44 | /**
  45 |  * Module exports.

我试过添加 target: "node"给我的"node_modules/react-scripts/config/webpack.config.js"但它不会工作...
以下是我已经尝试解决的一些方法:

    import express from "express";
    app = express();
---------------
    import express from "express";
    let app: express.Application;
    app = express();
-------------

    import express from "express";
    let app: any;
    app = express();

-------------
    const express require("express");
    let app: express.Application;
    app = express();

Answer 1

您必须同时实例化 app 和 express，同时使用 const 关键字。

const express = require('express');
const app = express();

此外，在您的代码库中查找您拥有的任何位置:

import { response } from 'express';

通常这是错误地输入的，删除此行可能会解决错误