递归列表

let list = [
    {
      actiontype: "Add,Delete,Edit,Show",
      description: "",
      icon: "",
      menucode: "00",
      menuname: "商品管理",
      menupath: "",
      menutype: "main",
      parentcode: "",
      sortby: "1",
    },
    {
      actiontype: "Add,Delete,Edit,Show",
      description: "",
      icon: "",
      menucode: "0001",
      menuname: "商品维度",
      menupath: "WaresManage/WaresDimension",
      menutype: "main",
      parentcode: "00",
      sortby: "1",
    },
    {
      actiontype: "Add,Delete,Edit,Show",
      description: "",
      icon: "",
      menucode: "0002",
      menuname: "商品品类",
      menupath: "WaresManage/WaresCategories",
      menutype: "main",
      parentcode: "00",
      sortby: "2",
    }
  ]

  const toTree = (data) => {
    var map = {};
    data.forEach(function (item) {
        map[item.menucode] = item;
    });
    console.log(map)
    var val = [];
    data.forEach(function (item) {
        var parent = map[item.parentcode];
        console.log(parent, item)
        if (parent) {
            (parent.children || ( parent.children = [] )).push(item);
        } else {
            //如果没有在map中找到对应的索引ID,那么直接把 当前的item添加到 val结果集中，作为顶级
            val.push(item);
        }
    });
    return val;
}

let menus = toTree(list);


修改后结果如下：
menues: [
    {
        "actiontype": "Add,Delete,Edit,Show",
        "description": "",
        "icon": "",
        "menucode": "00",
        "menuname": "商品管理",
        "menupath": "",
        "menutype": "main",
        "parentcode": "",
        "sortby": "1",
        "children": [
            {
                "actiontype": "Add,Delete,Edit,Show",
                "description": "",
                "icon": "",
                "menucode": "0001",
                "menuname": "商品维度",
                "menupath": "WaresManage/WaresDimension",
                "menutype": "main",
                "parentcode": "00",
                "sortby": "1"
            },
            {
                "actiontype": "Add,Delete,Edit,Show",
                "description": "",
                "icon": "",
                "menucode": "0002",
                "menuname": "商品品类",
                "menupath": "WaresManage/WaresCategories",
                "menutype": "main",
                "parentcode": "00",
                "sortby": "2"
            }
        ]
    }
]