目錄

• 封裝函數(shù)
• 調(diào)用函數(shù)

封裝函數(shù)

// 傳入 id、樹形結(jié)構(gòu)數(shù)據(jù)
export function getParentTree(id, tree) {
  let arr = [] //要返回的數(shù)組
  for (let i = 0; i < tree.length; i++) {
    let item = tree[i]
    arr = []
    arr.push(item) //保存當(dāng)前節(jié)點id
    if (id== item.id) {
      //判斷當(dāng)前id是否是默認(rèn)id
      return arr //是則退出循環(huán)、返回數(shù)據(jù)
    } else {
      //否則進(jìn)入下面判斷，判斷當(dāng)前節(jié)點是否有子節(jié)點數(shù)據(jù)
      if (item.children && item.children.length > 0) {
//合并子節(jié)點返回的數(shù)據(jù)
arr = arr.concat(getParentTree(id, item.children ? item.children : []))
console.log(arr)
if (arr.map(item2 => (item2 ? item2.id : "")).includes(id)) {
  //如果當(dāng)前數(shù)據(jù)中已包含默認(rèn)節(jié)點，則退出循環(huán)、返回數(shù)據(jù)
  return arr
}
      }
    }
  }

調(diào)用函數(shù)

const treeData = [{
  name: "1",
  id: 1,
  children: [{
    name: "1-1",
    id: 2,
    children: [{
      name: "1-1-1",
      id: 4,
    }],
    name: "1-2",
    id: 3,
    children: [{
      name: "1-2-1",
      id: 5,
    }],
  }]
},{
  name: "2",
  id: 6,
  children: [{
    name: "2-1",
    id: 7,
    children: [{
      name: "2-1-1",
      id: 9,
    }],
    name: "2-2",
    id: 8,
    children: [{
      name: "2-2-1",
      id: 10,
    }],
  }]
}]
console.log(getParentTree(5, treeData))

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