使用vue-echarts,需要按需引入
引入缺失报错：
Error in callback for watcher "options": "Error: Component series.bar not exists. Load it first."
解决：
import 'echarts/lib/chart/bar'文章来自：https://www.cnblogs.com/wwj007/p/12002726.html
引入缺失报错：
Error in callback for watcher "options": "Error: Component series.bar not exists. Load it first."
解决：
import 'echarts/lib/chart/bar'