1. The project uses ivew-admin

2. The problem is that the js and css built in the script bulid:uat are not small files by chunk, but the js,css is chunk in build:production.

as shown in the figure:
bulid:uat

build:production

1. the scripts for bulid:uat are: "build:uat": "cross-env NODE_ENV=uat vue-cli-service build",
   "build:production": "vue-cli-service build",

4.vue.config.js is configured as follows:

module.exports = {
  // Project deployment base
  // By default we assume your app will be deployed at the root of a domain,
  // e.g. https://www.my-app.com/
  // If your app is deployed at a sub-path, you will need to specify that
  // sub-path here. For example, if your app is deployed at
  // https://www.foobar.com/my-app/
  // then change this to "/my-app/"
  baseUrl: BASE_URL,
  // tweak internal webpack configuration.
  // see https://github.com/vuejs/vue-cli/blob/dev/docs/webpack.md

//  webpack
  configureWebpack: config => {
    let plugins = []
    // if (process.env.NODE_ENV !== "development") {
      config.plugins = [...config.plugins, ...plugins]
    // }
  },

  chainWebpack: config => {
    config.resolve.alias
      .set("@", resolve("src")) // key,value.set("@@", resolve("src/components"))
      .set("_c", resolve("src/components"))
      .set("_conf", resolve("config"))
  },
  // .map
  productionSourceMap: false,
  // axiosbaseUrl "" 
  // devServer: {
  //   proxy: "http://management-test2.tuhuanjk.com"
  // }
  devServer: {
    proxy: {
      "/api": {
        target: "",
        changeOrigin: true
      }
    }
  }


}

Please give me some guidance, the goal is to run bulid:uat, the same chunk,js and css files; thank you!