1、meta标签要写好

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<meta charset="utf-8">
  <meta name="viewport"
    content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
  <meta name="renderer" content="webkit">
  <meta name="author" content="lyadmin">
  <meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1">

2、编译插件要装好

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npm install babel-polyfill --save-dev

3、其他配置要配好

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  // webpack.base.conf.js
  entry: {
    app: ['babel-polyfill','./src/main.js']
  },


  // main.js
  
  import 'babel-polyfill'