vueruntimeesmjs4605 Vue warn Error in v-on handler TypeError Cannot set properties of null setting datafound in--- LaserTitle at DwebProjectLSS_Web4srcoperateMaplaserTitlevue OperateMapMsg at Dw

The error message indicates that you are trying to set properties of null in the line this.bmapExport.data = JSON.stringify(data). This means that this.bmapExport is null and does not have a data property.

To fix this issue, you need to make sure that this.bmapExport is not null before trying to set its properties. You can do this by initializing this.bmapExport with an empty object before setting its properties:

this.bmapExport = {}; // Initialize with an empty object
this.bmapExport.data = JSON.stringify(data);

This will ensure that this.bmapExport is not null and you can safely set its properties