Function treeMap

循环遍历树形数据返回符合条件的节点

Example

const tree = [{value: 1, id: 1, children: [{value: 2, pid: 1, id: 2, children: [{value: 3, pid: 2, id: 3}]}]}]
const nodes = treeMap(tree, {
  conversion: (node) => {
    if (node.value === 3) {
           return node
         }
     }
})
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