安装babel-polyfill
1. npm install --save babel-polyfill
2. man.js 引入 import 'babel-polyfill'
3. index.html 添加 <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
4. build中的webpack.base.conf.js修改如下配置
entry:{
app:['babel-polyfill','./src/main.js']
}