主体函数
export function findAllParent (node, tree, parentNodes = [], index = 0) {
if (!node || node.fid === 0) {
return
}
findParent(node, parentNodes, tree)
let parentNode = parentNodes[index]
findAllParent(parentNode, tree, parentNodes, ++index)
return parentNodes
}function findParent (node, parentNodes, tree) {
for (let i = 0; i < tree.length; i++) {
let item = tree[i]
if (item.id === node.fid) {
parentNodes.push(item)
return
}
if (item.children && item.children.length > 0) {
findParent(node, parentNodes, item.children)
}
}
}export default findAllParent
调用方式
import findParentNodes from './test'
let menuTreeData = [
{
id: 1,
fid: 0,
name: '1',
children: [
{
id: 11,
fid: 1,
name: '1-1',
children: [
{ id: 111, fid: 11, name: '1-1-1' },
{ id: 112, fid: 11, name: '1-1-2' }
]
},
{ id: 12, fid: 1, name: '1-2' }
]
},
{ id: 2, fid: 0, name: '2' }
]
let nodes = []
let parentNodes = findParentNodes({ id: 112, fid: 11 }, menuTreeData, nodes)
console.error('tag', nodes.map(item => item.name))
console.error('tag', parentNodes.map(item => item.name))
两种方式都可以获取到祖先节点的值