看到别人项目中的树数据处理写的很好很厉害，🆗，盗用借鉴：
//数据树处理
export function treeData (source, id, parentId, children) {let cloneData = JSON.parse(JSON.stringify(source))return cloneData.filter(father => {let branchArr = cloneData.filter(child => father[id] == child[parentId]);branchArr.length > 0 ? father[children] = branchArr : ''return father[parentId] == 0 // 如果第一层不是parentId=0，请自行修改})
}
/* [{id:1,parentId:0,name:"一级菜单A",rank:1},{id:2,parentId:0,name:"一级菜单B",rank:1},{id:3,parentId:0,name:"一级菜单C",rank:1},{id:4,parentId:1,name:"二级菜单A-A",rank:2},{id:5,parentId:1,name:"二级菜单A-B",rank:2},{id:6,parentId:2,name:"二级菜单B-A",rank:2},{id:7,parentId:4,name:"三级菜单A-A-A",rank:3},{id:8,parentId:7,name:"四级菜单A-A-A-A",rank:4},{id:9,parentId:8,name:"五级菜单A-A-A-A-A",rank:5},{id:10,parentId:9,name:"六级菜单A-A-A-A-A-A",rank:6},{id:11,parentId:10,name:"七级菜单A-A-A-A-A-A-A",rank:7},{id:12,parentId:11,name:"八级菜单A-A-A-A-A-A-A-A",rank:8},{id:13,parentId:12,name:"九级菜单A-A-A-A-A-A-A-A-A",rank:9},{id:14,parentId:13,name:"十级菜单A-A-A-A-A-A-A-A-A-A",rank:10},] */
// 调用时，字段名以字符串的形式传参，如treeData(source, 'id', 'parentId', 'children')
