# 安裝
npm install -g @vue/cli
# 新建項目
vue create my-project
# 項目啟動
npm run serve
# 打包
npm run build

module.exports = {
 // 基本路徑
 baseUrl: '/',
 // 輸出文件目錄
 outputDir: 'dist',
 // eslint-loader 是否在保存的時候檢查
 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 配置項
 // https://vue-loader.vuejs.org/en/options.html
 vueLoader: {},
 // 生產(chǎn)環(huán)境是否生成 sourceMap 文件
 productionSourceMap: true,
 // css相關(guān)配置
 css: {
  // 是否使用css分離插件 ExtractTextPlugin
  extract: true,
  // 開啟 CSS source maps?
  sourceMap: false,
  // css預(yù)設(shè)器配置項
  loaderOptions: {},
  // 啟用 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,
 // 是否啟用dll
 // See https://github.com/vuejs/vue-cli/blob/dev/docs/cli-service.md#dll-mode
 dll: false,
 // PWA 插件相關(guān)配置
 // see https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-pwa
 pwa: {},
 // webpack-dev-server 相關(guān)配置
 devServer: {
  open: process.platform === 'darwin',
  host: '0.0.0.0',
  port: 8080,
  https: false,
  hotOnly: false,
  proxy: null, // 設(shè)置代理
  before: app => {}
 },
 // 第三方插件配置
 pluginOptions: {
  // ...
 }
}

# string
module.exports = {
 devServer: {
  proxy: '<url>'
 }
}

# Object
module.exports = {
 devServer: {
  proxy: {
   '/api': {
    target: '<url>',
    ws: true,
    changeOrigin: true
   },
   '/foo': {
    target: '<other_url>'
   }
  }
 }
}

module.exports = {
 dll: true
}

module.exports = {
 dll: [
  'dep-a',
  'dep-b/some/nested/file.js'
 ]
}

 # 在 public/index.html中引用靜態(tài)資源
 <%= webpackConfig.output.publicPath %>
 <link rel="shortcut icon" href="<%= webpackConfig.output.publicPath %>favicon.ico" rel="external nofollow" >

 # vue templates中，需要在data中定義baseUrl
 <template>
  <img :src="`${baseUrl}my-image.png`">
 </template>
 <script>
  data () {
   return {
    baseUrl: process.env.BASE_URL
   }
  }
 </script>

// vue.config.js
module.exports = {
 chainWebpack: config => {
  config.module
   .rule('js')
    .include
     .add(/some-module-to-transpile/) // 要處理的模塊
 }
}

// vue.config.js
module.exports = {
 chainWebpack: config => {
  config.module
   .rule('scss')
   .use('sass-loader')
   .tap(options =>
    merge(options, {
     includePaths: [path.resolve(__dirname, 'node_modules')],
    })
   )
 }
}

// vue.config.js
module.exports = {
 chainWebpack: config => {
  config
   .plugin('html')
   .tap(args => {
    return [/* new args to pass to html-webpack-plugin's constructor */]
   })
 }
}

chainWebpack: config => {
  if (process.env.NODE_ENV === 'production') { 
    config
      .plugin('uglify')
      .tap(([options]) =>{
        // 去除 console.log
        return [Object.assign(options, {
          uglifyOptions: { compress: {
            drop_console : true,
            pure_funcs: ['console.log']
          }}
        })]
      })
  }
}

.env        # 在所有環(huán)節(jié)中執(zhí)行
.env.local     # 在所有環(huán)境中執(zhí)行，git會ignored
.env.[mode]     # 只在特定環(huán)境執(zhí)行( [mode] 可以是 "development", "production" or "test" )
.env.[mode].local  # 在特定環(huán)境執(zhí)行, git會ignored
.env.development  # 只在生產(chǎn)環(huán)境執(zhí)行
.env.production   # 只在開發(fā)環(huán)境執(zhí)行

# 鍵名須以VUE_APP開頭
VUE_APP_SECRET=secret

console.log(process.env.VUE_APP_SECRET)