获取本机ipv4地址：
可通过cmd，执行ipconfig/all预览本地ip信息；

// vue.config.js
const os = require("os");
let needHost = "0.0.0.0";
try {
  let network = os.networkInterfaces();
  console.log(network);
  needHost = network[Object.keys(network)[0]][1].address;
} catch {
  needHost = "localhost";
}
console.log(needHost);
module.exports = defineConfig({
...
  devServer: {
    host: needHost,
    port: 8080,
    open: true,
    proxy: {},
  },
});