webpack+vue打包生成公共配置文件（域名）方便动态修改

npm install --save-dev generate-asset-webpack-plugin 

{"ProdUrl":http://text.com}

 const GenerateAssetPlugin = require('generate-asset-webpack-plugin');
const serverCOnfig= require('../serverConfig.json')；//引入根目录下的配置文件
const createJson = function() {
 return JSON.stringify(serverConfig);
};
//plugins 中使用
 plugins: [
 //打包时生成一个配置文件
 new GenerateAssetPlugin({
  filename: 'serverConfig.json',
  fn: (compilation, cb) => {
   cb(null, createJson());
  },
 }),
]

service.interceptors.request.use(
 async (config) => {
  var baseURL = process.env.BASE_API
  if(process.env.NODE_ENV === "production"){
  await axios.get('serverConfig.json').then( e => {
   baseURL = e.data.ProdUrl
  })
  }
  config.baseURL = baseURL
  if (store.getters.token) {
  // 让每个请求携带token
  config.headers["X-Token"] = getToken();
  config.headers = {
   "X-Token": getToken(),
   "Content-Type": "application/json-patch+json"
  };
  }
  return config;
 },
 error => {
  // Do something with request error
  console.log(error); // for debug
  Promise.reject(error);
 }
 );