基于vue-cli npm run build之后vendor.js文件過大的解決方法

<div id="app"></div>
<!-- 先引入 Vue -->
<!--開發環境-->
<script src="https://cdn.bootcss.com/vue/2.5.3/vue.js"></script>
<!--生產環境-->
<!--<script src="https://cdn.bootcss.com/vue/2.5.3/vue.min.js"></script>-->
<!-- 引入組件庫 -->
<script src="https://cdn.bootcss.com/axios/0.17.1/axios.min.js"></script>
<script src="https://cdn.bootcss.com/element-ui/1.4.10/index.js"></script>

externals: {
 vue: 'Vue',
 'element': 'element-ui',
 'axios':'axios',
 },

cnpm install --save-dev compression-webpack-plugin

 // Gzip off by default as many popular static hosts such as
 // Surge or Netlify already gzip all static assets for you.
 // Before setting to `true`, make sure to:
 // npm install --save-dev compression-webpack-plugin
 productionGzip: true,
 productionGzipExtensions: ['js', 'css'],

 // Run the build command with an extra argument to
 // View the bundle analyzer report after build finishes:
 // `npm run build --report`
 // Set to `true` or `false` to always turn it on or off
 bundleAnalyzerReport: process.env.npm_config_report