今天在编写JavaScript代码时，缺少了包express。

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

app.get('/', (req, res) => {
  res.send('Hello, world!');
});

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});

npm install express

发生如下报错： 

npm error code CERT_HAS_EXPIRED
npm error errno CERT_HAS_EXPIRED
npm error request to https://registry.npm.taobao.org/express failed, reason: certificate has expired
npm error A complete log of this run can be found in: C:\Users\VICTUS\AppData\Local\npm-cache\_logs\2024-09-23T04_26_15_084Z-debug-0.log

这时候需要配置tabao镜像。

npm config set registry https://registry.npm.taobao.org/

发现还是报错，原来在新的版本中，tabao镜像已经不再支持，为此需要下面代码： 

npm config set registry https://registry.npmmirror.com

npm install express

added 65 packages in 2s

13 packages are looking for funding
  run `npm fund` for details

问题成功解决；

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

app.get('/', (req, res) => {
  res.send('Hello, world!');
});

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});