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| let data = [
{ id: 0, parentId: null, name: '生物' },
{ id: 1, parentId: 0, name: '动物' },
{ id: 2, parentId: 0, name: '植物' },
{ id: 3, parentId: 0, name: '微生物' },
{ id: 4, parentId: 1, name: '哺乳动物' },
{ id: 5, parentId: 1, name: '卵生动物' },
{ id: 6, parentId: 2, name: '种子植物' },
{ id: 7, parentId: 2, name: '蕨类植物' },
{ id: 8, parentId: 4, name: '大象' },
{ id: 9, parentId: 4, name: '海豚' },
{ id: 10, parentId: 4, name: '猩猩' },
{ id: 11, parentId: 5, name: '蟒蛇' },
{ id: 12, parentId: 5, name: '麻雀' },
]
const toTree = (arr, pid = null) => {
return arr.filter((item) => {
if (item.parentId === pid) item.children = toTree(arr, item.id)
return item.parentId === pid
})
}
toTree(data)
|
