解决方案：
1.版本问题，main.js文件中，
5.0以下版本写：import echarts from 'echarts '
5.0以上版本写： import * as echarts from ‘echarts
都要写：Vue.prototype.$echarts = echarts
2.删掉node_modules文件，重新install
3.开发页面不要直接使用echarts.init()，要用this.$echarts.init(）
- properties TypeError undefined echarts mountedproperties typeerror undefined echarts properties typeerror undefined reading properties typeerror undefined uncaught typeerror non-mysql undefined property typeerror undefined property cannot typeerror undefined property webpack typeerror undefined property upgrade typeerror undefined uncaught property quot properties typeerror undefined properties typeerror undefined时报