vue解决跨域问题 and nodejs解决跨域问题

const { defineConfig } = require('@vue/cli-service')
module.exports = defineConfig({
  transpileDependencies: true,
  devServer: {
    proxy: {
      '/api': {
        target: 'http://localhost:3456/',
        changeOrigin: true,
        pathRewrite: {
          '^/api': ''
        }
      }
    }
  }
})

const express = require('express')
const cors = require("cors")

const app = express()

// 核心
app.use(cors())

app.get("/get_api", (req, res) => {
    res.send({
        id: 1,
        name: '张三',
        age: 13
    })
})

app.listen(3456, () => {
    console.log(
        'server is running at localhost:3456'
    )
})