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)

　效果图：