<!-- Thank you for contributing! Please carefully read the following before opening your issue. --> ### Element version <!-- 1.0.0-rc.3 --> ### OS/Browers version <!-- macOS/Chrome 53 --> ### Vue version <!-- 2.0.0-rc.4 --> 单独导入引入Notification时 `import { Notification } from 'element-ui';` 会在此位置报错 `_this.$el.parentNode.removeChild(_this.$el);` 出错位置为/notification/src/main.vue文件49行 <img width="540" alt="qq20160919-0 2x" src="https://cloud.githubusercontent.com/assets/446359/18625831/b3a75222-7e83-11e6-9257-ed778fe8cf7b.png">