用import * as echarts from 'echarts' 替换 import echarts from 'echarts',便可以有效解决
- properties TypeError undefined 时报 解决方案properties typeerror undefined时报 properties typeerror undefined reading properties typeerror undefined uncaught typeerror undefined property cannot typeerror undefined uncaught property typeerror non-mysql undefined property typeerror undefined property upgrade typeerror undefined property webpack quot properties typeerror undefined properties tappromise typeerror undefined