module.exports = {
   // 基本路径
  publicPath: '/',
   // 输出文件目录
   outputDir: 'dist',
   // eslint-loader 是否在保存的时候检查
   lintOnSave: true,
   // use the full build with in-browser compiler?
   // https://vuejs.org/v2/guide/installation.html#Runtime-Compiler-vs-Runtime-only
   compiler: false,
   // webpack配置
   // see https://github.com/vuejs/vue-cli/blob/dev/docs/webpack.md
   chainWebpack: () => {},
   configureWebpack: () => {},
   // vue-loader 配置项
   // https://vue-loader.vuejs.org/en/options.html
   vueLoader: {},
   // 生产环境是否生成 sourceMap 文件
   productionSourceMap: true,
   // css相关配置
   css: {
    // 是否使用css分离插件 ExtractTextPlugin
    extract: true,
    // 开启 CSS source maps?
    sourceMap: false,
    // css预设器配置项
    loaderOptions: {},
    // 启用 CSS modules for all css / pre-processor files.
    modules: false
   },
   // use thread-loader for babel & TS in production build
   // enabled by default if the machine has more than 1 cores
   parallel: require('os').cpus().length > 1,
   // 是否启用dll
   // See https://github.com/vuejs/vue-cli/blob/dev/docs/cli-service.md#dll-mode
   dll: false,
   // PWA 插件相关配置
   // see https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-pwa
   pwa: {},
   // webpack-dev-server 相关配置
   devServer: {
    open: process.platform === 'darwin',
    host: '0.0.0.0',
    port: 8080,
    https: false,
    hotOnly: false,
    proxy: null, // 设置代理
    before: app => {}
   },
   // 第三方插件配置
   pluginOptions: {
    // ...
   }
  }