js 无限极分类

getTree(list, pid, leval) {
let tmp = [];
list.forEach((item, index) => {
if (item.customItem6__c == pid) {
item.leval = leval
item.value = item.id,
item.label = item.customItem1__c
item.children = this.getTree(list, item.id, leval + 1)
tmp.push(item)
}
})
return tmp;
}