剪取子树

treeSub(tree, id, [options])

根据主键从树中剪取一棵子树， 如：{ id, parentId, children: [] }。

参数

参数	类型	默认	说明
tree	tree		树状结构数据
id	any		主键的值，如：chartIndex
options	object		配置选项

返回

参数	类型	说明
*	object	剪取下的子树，注意其类型为对象

示例

调用

import { treeSub } from '@axolo/tree-array'

const tree = [{
  id: 'home',
  path: '/home',
  parentId: null
}, {
  id: 'chart',
  path: '/chart',
  parentId: null,
  children: [{
    id: 'chartIndex',
    path: '/chart/index',
    parentId: 'chart',
    children: [{
      id: 'chartIndexTop',
      path: '/chart/index/top',
      parentId: 'chartIndex'
    }, {
      id: 'chartIndexActive',
      path: '/chart/index/active',
      parentId: 'chartIndex',
      children: [{
        id: 'chartIndexActiveMy',
        path: '/chart/index/active/my',
        parentId: 'chartIndexActive'
      }]
    }]
  }, {
    id: 'chartReview',
    path: '/chart/review',
    parentId: 'chart'
  }, {
    id: 'chartProject',
    path: '/chart/project',
    parentId: 'chart',
    children: [{
      id: 'chartProjectYou',
      path: '/chart/project/you',
      parentId: 'chartProject',
      test: true
    }, {
      id: 'chartProjectMy',
      path: '/chart/project/my',
      parentId: 'chartProject',
      children: [{
        id: 'chartProjectMyOne',
        path: '/chart/project/my/one',
        parentId: 'chartProjectMy'
      }, {
        id: 'chartProjectMyTwo',
        path: '/chart/project/my/two',
        parentId: 'chartProjectMy'
      }]
    }]
  }]
}, {
  id: 'smile',
  path: '/smile',
  parentId: null,
  children: [{
    id: 'smileIndex',
    path: '/smile/index',
    parentId: 'smile',
    test: true
  }]
}]

treeSub(tree, 'chartIndexActive') // object of sub tree

结果

{
  "id": "chartIndexActive",
  "path": "/chart/index/active",
  "parentId": "chartIndex",
    "children": [{
    "id": "chartIndexActiveMy",
    "path": "/chart/index/active/my",
    "parentId": "chartIndexActive"
  }]
}