1.echarts父子组件传值为null

https://blog.csdn.net/Uookic/article/details/80638883

2.父组件异步获取的数据给子组件，子组件报错或数据不更新

https://blog.csdn.net/Cynthia_Yue27/article/details/89216704

3.echarts数组赋值

数组赋值顺序颠倒