如何使用嵌套数据扩展角度材料树中的嵌套节点？

{
  "name": "树",
  "children": [
    {
      "name": "树干",
      "children": [
        {
          "name": "树皮"
        },
        {
          "name": "树心"
        }
      ]
    },
    {
      "name": "树枝",
      "children": [
        {
          "name": "树叶"
        }
      ]
    }
  ]
}

function expandNode(node) {
  if (node.children) {
    // 遍历子节点
    for (let i = 0; i < node.children.length; i++) {
      const childNode = node.children[i];
      // 添加新的子节点或属性
      childNode.newProperty = "新属性";
      // 递归调用扩展节点函数
      expandNode(childNode);
    }
  }
}

// 解析嵌套数据
const data = JSON.parse('{"name":"树","children":[{"name":"树干","children":[{"name":"树皮"},{"name":"树心"}]},{"name":"树枝","children":[{"name":"树叶"}]}]}');

// 扩展节点
expandNode(data);

// 更新数据
const updatedData = JSON.stringify(data);
console.log(updatedData);