在vue json中将文件/目录结构转换为“树”，如何在新的json类型中添加新字段？

// 假设文件/目录结构如下：
const fileStructure = [
  {
    name: "文件1",
    type: "file"
  },
  {
    name: "目录1",
    type: "directory",
    children: [
      {
        name: "文件2",
        type: "file"
      },
      {
        name: "目录2",
        type: "directory",
        children: [
          {
            name: "文件3",
            type: "file"
          }
        ]
      }
    ]
  }
];

// 转换为树形结构的JSON对象
function convertToTree(data) {
  const result = [];
  const map = {};

  data.forEach(item => {
    map[item.name] = item;
    item.children = [];
  });

  data.forEach(item => {
    if (item.type === "directory") {
      const parent = map[item.name.substring(0, item.name.lastIndexOf("/"))];
      if (parent) {
        parent.children.push(item);
      } else {
        result.push(item);
      }
    }
  });

  return result;
}

const tree = convertToTree(fileStructure);
console.log(tree);

item.size = 0; // 设置默认值为0，可以根据实际情况进行修改