vue - .babelrc

描述：bable-es2015以及babel本身组件在新版本要求的外部配置文件.

 {
   "presets": [
     ["env", {
       "modules": false,
       "targets": {
         "browsers": ["> 1%", "last 2 versions", "not ie <= 8"]
       }
     }],
     "stage-2"
   ],
   "plugins": ["transform-vue-jsx", "transform-runtime"]
 }

具体请查看官网文档：https://babeljs.io/docs/en/options