Express.js/Typescript：錯誤 TS2339：屬性“發送”在類型“響應”上不存在

Question

我在 Phpstorm 2019.3 中看到了這個，在 under.send() 下有紅色棉絨

// package.json
  "dependencies": {
    "express": "^4.17.1"
  },
  "devDependencies": {
    "@types/express": "^4.17.2",
    "tslint": "^5.12.0",
    "typescript": "^3.2.2"
  },

// index.ts
const express = require("express")();

express.get('/', (req: Request, res: Response): void => {
 res.send('Express App Running') // TS2339: Property 'send' does not exist on type 'Response'
});

這些是錯誤的類型定義還是其他原因？

Answer 1

回調中的Request和Response類型可能不是 Express 提供的類型。
確保導入正確的類型：

import express, { Request, Response } from "express";

const app = express();

app.get("/", (req: Request, res: Response) => {
  res.send("foo");
});