echarts.min.js:45 Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'regions')

这个错误是因为在使用echarts绘制地图时，代码中读取了未定义的'regions'属性，导致出现了TypeError错误。这个问题可能有多种原因引起。

一种可能性是在自定义地图的过程中，生成的geoJson中包含了一个区域的geometry.type为GeometryCollection，而echarts对于这种类型没有做处理，导致出现了错误。你可以查看echarts的源码文件parseGeoJson.js来确认是否存在这个问题。<em>1</em><em>2</em><em>3</em>
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