我有一个包含 3 个级别的对象数组。我想用属性“code”来定位最里面的 child 。如果存在代码，则使用 selected: true 更新子对象和父对象。如果该属性已经为 true，则发送相同的值应将子项设置为 selected: false (切换)
这就是我到目前为止所要做的。如果子项的 selected 为 true，则发送另一个代码应为相应的子项设置 selected: true ，并为 selected 属性为 true 的子项设置 selected: false 。
此外，如果子项的 selected 为 true，则子项以及父项和祖项的 defaultCollapsed 属性应为 false。如果子项的 selected 为 false，则子项以及父项和祖项的 defaultCollapsed 属性应为 true
const data = [{
"label": "Grand Parent 1",
"index": 0,
"code": "GRAND_PARENT_1",
"defaultCollapsed": true,
"items": [{
"id": 1,
"items": [{
"id": 100,
"label": "Child 1",
"url": "#CHILD_1",
"code": "CHILD_1",
},
{
"id": 200,
"label": "Child 2",
"url": "#CHILD_2",
"code": "CHILD_2"
},
{
"id": 300,
"label": "Child 3",
"url": "#CHILD_3",
"code": "CHILD_3"
},
{
"id": 400,
"label": "Child 4",
"url": "#CHILD_4",
"code": "CHILD_4"
}
],
"defaultCollapsed": true,
"label": "Parent 1",
"selected": true,
},
{
"id": 2,
"items": [],
"defaultCollapsed": true,
"label": "Parent 2"
},
{
"id": 3,
"items": [],
"defaultCollapsed": true,
"label": "Parent 3"
},
{
"id": 4,
"items": [],
"defaultCollapsed": true,
"label": "Parent 4"
}
]
},
{
"label": "Grand Parent 2",
"index": 1,
"code": "GRAND_PARENT_2",
"defaultCollapsed": true,
"items": []
},
{
"label": "Grand Parent 3",
"index": 2,
"code": "GRAND_PARENT_3",
"defaultCollapsed": true,
"items": []
}
]
function select(items, key, value) {
if (!Array.isArray(items)) {
return false;
}
for (const item of items) {
if (item.code === value || select(item.items, key, value)) {
item.selected = !item.selected;
item.defaultCollapsed = false;
return true;
}
}
return false;
}
function reset(items) {
if (!Array.isArray(items)) {
return;
}
for (const item of items) {
if (item.selected) {
reset(item.items);
item.selected = false;
break;
}
}
}
function resetAndSelect(data, key, value) {
reset(data);
select(data, key, value);
}
resetAndSelect(data, 'code', 'CHILD_1')
console.log('CHILD_1',data)
resetAndSelect(data, 'code', 'CHILD_2')
console.log('CHILD_2',data)<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.js"></script>如果代码是 CHILD_1:
[{
"label": "Grand Parent 1",
"index": 0,
"code": "GRAND_PARENT_1",
"defaultCollapsed": true,
"selected": true,
"items": [{
"id": 1,
"items": [{
"id": 100,
"label": "Child 1",
"url": "#CHILD_1",
"code": "CHILD_1",
"selected": true,
},
{
"id": 200,
"label": "Child 2",
"url": "#CHILD_2",
"code": "CHILD_2"
},
{
"id": 300,
"label": "Child 3",
"url": "#CHILD_3",
"code": "CHILD_3"
},
{
"id": 400,
"label": "Child 4",
"url": "#CHILD_4",
"code": "CHILD_4"
}
],
"defaultCollapsed": false,
"label": "Parent 1",
"selected": true,
},
{
"id": 2,
"items": [],
"defaultCollapsed": true,
"label": "Parent 2"
},
{
"id": 3,
"items": [],
"defaultCollapsed": true,
"label": "Parent 3"
},
{
"id": 4,
"items": [],
"defaultCollapsed": true,
"label": "Parent 4"
}
]
},
{
"label": "Grand Parent 2",
"index": 1,
"code": "GRAND_PARENT_2",
"defaultCollapsed": true,
"items": []
},
{
"label": "Grand Parent 3",
"index": 2,
"code": "GRAND_PARENT_3",
"defaultCollapsed": true,
"items": []
}
]
如果上面的输出是实际数据，并且代码又是CHILD_1，我需要切换子级的选定属性以及相应的父级。
[{
"label": "Grand Parent 1",
"index": 0,
"code": "GRAND_PARENT_1",
"defaultCollapsed": true,
"selected": false,
"items": [{
"id": 1,
"items": [{
"id": 100,
"label": "Child 1",
"url": "#CHILD_1",
"code": "CHILD_1",
"selected": false,
},
{
"id": 200,
"label": "Child 2",
"url": "#CHILD_2",
"code": "CHILD_2"
},
{
"id": 300,
"label": "Child 3",
"url": "#CHILD_3",
"code": "CHILD_3"
},
{
"id": 400,
"label": "Child 4",
"url": "#CHILD_4",
"code": "CHILD_4"
}
],
"defaultCollapsed": false,
"label": "Parent 1",
"selected": false,
},
{
"id": 2,
"items": [],
"defaultCollapsed": true,
"label": "Parent 2"
},
{
"id": 3,
"items": [],
"defaultCollapsed": true,
"label": "Parent 3"
},
{
"id": 4,
"items": [],
"defaultCollapsed": true,
"label": "Parent 4"
}
]
},
{
"label": "Grand Parent 2",
"index": 1,
"code": "GRAND_PARENT_2",
"defaultCollapsed": true,
"items": []
},
{
"label": "Grand Parent 3",
"index": 2,
"code": "GRAND_PARENT_3",
"defaultCollapsed": true,
"items": []
}
]
最佳答案
您可以通过使用 forEach 循环创建递归函数并通过递归传递父级数组来完成此操作，以便您可以更新其选定的属性。
const data = [{"label":"Grand Parent 1","index":0,"code":"GRAND_PARENT_1","defaultCollapsed":true,"items":[{"id":1,"items":[{"id":100,"label":"Child 1","url":"#CHILD_1","code":"CHILD_1"},{"id":200,"label":"Child 2","url":"#CHILD_2","code":"CHILD_2"},{"id":300,"label":"Child 3","url":"#CHILD_3","code":"CHILD_3"},{"id":400,"label":"Child 4","url":"#CHILD_4","code":"CHILD_4"}],"defaultCollapsed":true,"label":"Parent 1","selected":true},{"id":2,"items":[],"defaultCollapsed":true,"label":"Parent 2"},{"id":3,"items":[],"defaultCollapsed":true,"label":"Parent 3"},{"id":4,"items":[],"defaultCollapsed":true,"label":"Parent 4"}]},{"label":"Grand Parent 2","index":1,"code":"GRAND_PARENT_2","defaultCollapsed":true,"items":[]},{"label":"Grand Parent 3","index":2,"code":"GRAND_PARENT_3","defaultCollapsed":true,"items":[]}]
function update(data, key, value, parents = []) {
data.forEach(e => {
if (e[key] === value) {
if (parents.length) {
e.selected = !e.selected;
parents.forEach(p => {
p.defaultCollapsed = !e.selected
p.selected = e.selected
})
data.forEach(s => {
if (s != e && s.selected) s.selected = false;
});
}
}
if (e.items && e.items.length) {
update(e.items, key, value, [...parents, e])
}
})
}
update(data, 'code', 'CHILD_4')
update(data, 'code', 'CHILD_4')
update(data, 'code', 'CHILD_2')
update(data, 'code', 'CHILD_1')
console.log(data)关于javascript - 切换对象嵌套数组的属性 - JS，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/59095052/