Vue配置CDN减轻包大小

index.html文件引入cdn

    <script src="//cdn.bootcss.com/vue/2.5.2/vue.min.js"></script>
    <script src="//cdn.bootcss.com/vue-router/3.0.1/vue-router.min.js"></script>
    <script src="https://cdn.bootcss.com/vuex/3.0.1/vuex.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/axios@0.18.0/dist/axios.min.js"></script>

项目根目录创建vue.config.js文件

moudule.exports = {
  configureWebpack : {
    externals :{
      vue : "Vue",
      vuex : "Vuex",
      "vue-router" : "VueRouter"  ,
      axios : "axios"
}
}
}