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树数据中根据子节点id查找父节点的id

2022-07-13 17:36:00 【Jason秀啊】 

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  <script> var arr = [{
       key: '1', children: [ {
       key: '1-0', children: [ {
       key: '1-0-0' } ] } ] }, {
       key: '2', children: [ {
       key: '2-0', children: [ {
       key: '2-0-0', children: [ {
       key: '2-0-0-0' } ] } ] }, {
       key: '2-1', children: [ {
       key: '2-1-0' } ] } ] }] const getParentId = (treeData, id) => {
       let pid = ''; const fn = (treeData, key) => {
       for (let i = 0; i < treeData.length; i++) {
       const item = treeData[i] if (item.key === id) {
       pid = key return; } if (item?.children) fn(item.children, item.key); } }; fn(treeData, id); return pid; }; console.log('father of 2-0-0-0 is:', getParentId(arr, '2-0-0-0')); // father of 2-0-0-0 is: 2-0-0 </script>
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本文为[Jason秀啊]所创，转载请带上原文链接，感谢
https://blog.csdn.net/qq_44704740/article/details/121614419

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