let array = [
{
id: 1,
name: "小明",
children: [
{
id: 2,
name: "小红",
},
],
},
{
id: 3, name: "小刚", children: [] },
];
function getFlatArr(arr) {
return arr.reduce((a, item) => {
let flatArr = [...a, item];
if (item.children) {
flatArr = [...flatArr, ...getFlatArr(item.children)];
}
return flatArr;
}, []);
}
console.log(getFlatArr(array));
function getNameByIdFromArr(arr, id) {
return getFlatArr(arr).find((item) => item.id === id).name;
}
console.log(getNameByIdFromArr(array, 2));
// 结果: '小红'
// 根据id:[1,2,3]筛选出对应的label值的方法(data是getFlatArr新的数组,value是选中的id数组)
filterbrandLabel (data, value) {
const labelAll = []
if (Array.isArray(value)) {
for (const item of value) {
for (const v of data) {
if (String(item) === String(v.value)) {
labelAll.push(v.label)
}
}
}
} else {
for (const v of data) {
if (String(value) === String(v.value)) {
labelAll.push(v.label)
}
}
}
return labelAll.length > 0 ? labelAll.join('、') : '无'
},
getbrandNameByIdFromArr () {
const newarry = this.getFlatArr(array)
return this.filterbrandLabel(newarry, [1,2,3])
},
console.log(getbrandNameByIdFromArr());
// 最终结果: ['小明','小红','小刚']
JS中的递归:对象数组里根据id获取name,对象可能有children属性
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转载自blog.csdn.net/qq_44552416/article/details/127302551
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