目录
封装函数
// 传入 id、树形结构数据
export function getParentTree(id, tree) {
let arr = [] //要返回的数组
for (let i = 0; i < tree.length; i++) {
let item = tree[i]
arr = []
arr.push(item) //保存当前节点id
if (id== item.id) {
//判断当前id是否是默认id
return arr //是则退出循环、返回数据
} else {
//否则进入下面判断，判断当前节点是否有子节点数据
if (item.children && item.children.length > 0) {
//合并子节点返回的数据
arr = arr.concat(getParentTree(id, item.children ? item.children : []))
console.log(arr)
if (arr.map(item2 => (item2 ? item2.id : '')).includes(id)) {
//如果当前数据中已包含默认节点，则退出循环、返回数据
return arr
}
}
}
}
调用函数
const treeData = [{
name: '1',
id: 1,
children: [{
name: '1-1',
id: 2,
children: [{
name: '1-1-1',
id: 4,
}],
name: '1-2',
id: 3,
children: [{
name: '1-2-1',
id: 5,
}],
}]
},{
name: '2',
id: 6,
children: [{
name: '2-1',
id: 7,
children: [{
name: '2-1-1',
id: 9,
}],
name: '2-2',
id: 8,
children: [{
name: '2-2-1',
id: 10,
}],
}]
}]
console.log(getParentTree(5, treeData))