js数组转成树形结构

js将数组转成对应的树形结构：

function transformArrayToObject(array) {
    const result = {};
    array.forEach(item => {
        const {id,name,pid,flag} = item;
        if (pid == 0) {
            result[name] = {id,flag,pid}
        } else {
            transformObj(result, item)
        }
    });
    return result;
}
 
function transformObj(obj, item) {
    const {id,name,pid,flag} = item;
    for (var key in obj) {
        var val = obj[key]
        if (key != 'id') {
            if (typeof val === 'object') {
                transformObj(val, item)
            }
        } else {
            if (val == pid) {
                obj[name] = {id,flag,pid}
                break;
            }
        }
    }
    return obj
}
 
function adjustObj(obj) {
    let flag = false;
    for (var key in obj) {
        if (typeof obj[key] === 'object') {
            obj[key] = adjustObj(obj[key]);
            flag = true
        }
    }
    if (!flag) {
        obj = obj.flag
    }
    return obj
}
 
const array = [{id: 1,name: 'index',pid: 0,flag: true},
{id: 2,name: 'monitor',pid: 1,flag: true},
{id: 3,name: 'scan',pid: 1,flag: true},
{id: 4,name: 'subscan',pid: 3,flag: false},
{id: 5,name: 'legder',pid: 0,flag: true},
{id: 6,name: 'add',pid: 5,flag: false},
];
 
const transformedObject = transformArrayToObject(array);
console.log("没有子级不做处理，依旧是对象结构：", transformedObject)
//const adObj = adjustObj(transformedObject)
//console.log("对没有子级的做处理，不返回对象:", adObj)