1.npm安装
npm install babel-polyfill
npm install es6-promise
2.main.js引入
import 'babel-polyfill'
import Es6Promise from 'es6-promise'
require('es6-promise').polyfill()
Es6Promise.polyfill()
3.webpack.base.conf.js (入口更新)
entry: {
app: ["babel-polyfill", "./src/main.js"]//最新的入口
// app: ‘./src/main.js’//原来的入口
},