Cannot set property ‘dataIndex‘ of undefined 大数据关系图报错，赋予的数据有重复，去重

赋予数据有重复

let data = [1,1,1,2,3] //去重 data = new Set(data) data = [...data] //[1, 2, 3]

参考自：https://blog.csdn.net/weixin_38098195/article/details/80827926