vue3 + elementPlus 树形穿梭框_vue3使用elementplus穿梭框树形多选

 HTML

<template>
  <div>
    <div class="v-transfer">
      <!-- 左侧框 -->
      <div class="v-transfer-item v-transfer-left">
        <div class="header">
          <el-checkbox v-model="checkedLeft" :disabled="leftTreeData.length < 1" label="" size="large"
            style="margin-right: 12px" @change="leftAllCheck" />
          {{ leftTitle }}
        </div>
        <div class="content">
          <!-- 搜索框 -->
          <div class="seacrh-box">
            <el-input v-model.trem="leftFilterText" placeholder="请输入" clearable @clear="onSearchLeft"
              @keyup.enter="onSearchLeft" @change="onSearchLeft"></el-input>
          </div>
          <!-- 数据区域 -->
          <div class="tree-box">
            <div class="empty-box" v-if="leftTreeData.length < 1">暂无数据</div>
            <el-tree class="tree" v-else ref="leftTreeRef" :data="leftTreeData" show-checkbox :node-key="'id'"
              :filter-node-method="filterNode" :props="props.defaultProps" @check="onCheckLeft">
              <template #default="{ data }">
                <span style="padding-left: 4px; font-size: 16px">{{ data.title }}</span>
              </template></el-tree>
          </div>
        </div>
      </div>
      <!-- 按钮区域 -->
      <div class="v-transfer-middle">
        <div class="middle-icon">
          <div :disabled="leftOperation.length < 1" @click="addHandle">
            <ArrowRight style="width: 1em; height: 1em" />
          </div>
          <div :disabled="rightOperation.length < 1" @click="delHandle">
            <ArrowLeft style="width: 1em; height: 1em" />
          </div>
        </div>
      </div>
      <!-- 右侧框 -->
      <div class="v-transfer-item v-transfer-right">
        <div class="header">
          <el-checkbox v-model="checkedRight" :disabled="rightTreeData.length < 1" label="" size="large"
            style="margin-right: 12px" @change="rightAllCheck" />{{ rightTitle }}
        </div>
        <div class="content">
          <!-- 搜索框 -->
          <div class="seacrh-box">
            <el-input v-model.trem="rightFilterText" placeholder="请输入" clearable @clear="onSearchRight"
              @keyup.enter="onSearchRight" @change="onSearchRight"></el-input>
          </div>
          <!-- 数据区域 -->
          <div class="tree-box">
            <div class="empty-box" v-if="rightTreeData.length < 1">暂无数据</div>
            <el-tree class="tree" v-else ref="rightTreeRef" :filter-node-method="filterNode" :data="rightTreeData"
              show-checkbox :node-key="'id'" :props="props.defaultProps" @check="onCheckRight">
              <template #default="{ data }">
                <span style="padding-left: 4px; font-size: 16px">{{ data.title }}</span>
              </template>
            </el-tree>
          </div>
        </div>
      </div>
    </div>
    <div class="bottomBtn">
      <el-button type="primary" style="background-color:#0068DA;" @click="roleDialogSubmit">确认授权</el-button>
    </div>
  </div>
</template>

 JS

<script setup lang="ts" name="TreeTransfer">
import { onMounted, ref, reactive, watch, nextTick } from 'vue'
import { ElTree, ElMessage, ElMessageBox } from 'element-plus'
import { grant } from '@/api/roleMangement/index'
import type Node from 'element-plus/es/components/tree/src/model/node'
import lodash from 'lodash'
import { TreeNodeData } from 'element-plus/es/components/tree/src/tree.type'
import { Right } from '@element-plus/icons-vue'
import { treeToList } from '@/utils/util'
interface treeNode {
  className: string
  parentId: string
  id: string
  children?: treeNode
}
 
const props = defineProps({
  leftTitle: {
    type: String,
    default: () => {
      return ''
    }
  },
  rightTitle: {
    type: String,
    default: () => {
      return ''
    }
  },
  leftTree: {
    type: Array,
    default: () => {
      return []
    }
  },
  rightTree: {
    type: Array,
    default: () => {
      return []
    }
  },
  defaultProps: {
    type: Object,
    default: () => {
      return {
        children: 'children',
        label: 'title'
      }
    }
  },
  nodeKey: {
    type: String,
    default: 'id'
  },
  leafsArr: {
    type: Array,
    default: () => {
      return []
    }
  }
})
 
const checkedLeft = ref(false)
const checkedRight = ref(false)
 
// 抛出事件
const emits = defineEmits(['change', 'delete', 'add'])
 
const leftFilterText = ref<string>('')
const leftTreeData = ref<any[]>([])
const leftDefaultCheckedKeys = ref<any[]>([])
const leftDefaultExpandedKeys = ref<any[]>([])
const leftOperation = ref<any[]>([])
const leftTreeRef = ref<InstanceType<typeof ElTree>>()
 
const rightFilterText = ref<string>('')
const rightTreeData = ref<any[]>([])
const rightDefaultCheckedKeys = ref<any[]>([])
const rightDefaultExpandedKeys = ref<any[]>([])
const rightOperation = ref<any[]>([])
const rightTreeRef = ref<InstanceType<typeof ElTree>>()
const removeNodes = ref<any[]>([])
interface Tree {
  id: number
  label: string
  children?: Tree[]
}
 
watch(
  props,
  newVal => {
    leftTreeData.value = lodash.cloneDeep(newVal.leftTree)
    rightTreeData.value = lodash.cloneDeep(newVal.rightTree)
  },
  { immediate: true }
)
watch(rightFilterText, val => {
  rightTreeRef.value!.filter(val)
})
watch(leftFilterText, val => {
  leftTreeRef.value!.filter(val)
})
defineExpose({
  leftTreeData,
  rightTreeData
})
 
onMounted(() => {
  leftFilterText.value = ''
  rightFilterText.value = ''
})
 
const formatTree = (tree: any[], parentKey: string = 'parentId', idKey: string = 'id') => {
  // 格式化选择的树：清除全选下面的子节点
  let swap,
    parentIds: string[] = []
  // 先找出有children的id集合，再把所有的数据做对比，只要parentId和其中一个对上，就把该数据删除；
  tree.forEach((item, index) => {
    if (item.children) {
      parentIds.push(item[idKey])
    }
  })
  swap = tree.filter((item, index) => {
    if (parentIds.indexOf(item[parentKey]) == -1) {
      return item
    }
  })
  return swap
}
 
// 左侧选中
const onCheckLeft = () => {
  leftOperation.value = formatTree(
    leftTreeRef.value!.getCheckedNodes(false) || [],
    'parentId',
    'id'
  )
}
// 左侧搜素
// const onSearchLeft = () => {
//   leftTreeRef.value!.filter(leftFilterText.value)
// }
// 左侧过滤
// const filterLeftNode = (value: string, data: Tree, node: treeNode) => {
//   if (!value) return true
//   return chodeNode(value, data, node)
// }
 
// 右侧选中
const onCheckRight = () => {
  rightOperation.value = formatTree(
    rightTreeRef.value!.getCheckedNodes(false) || [],
    'parentId',
    'id'
  )
}
// 右侧搜素
const onSearchRight = () => {
  rightTreeRef.value!.filter(rightFilterText.value)
}
// 左
const onSearchLeft = () => {
  leftTreeRef.value!.filter(leftFilterText.value)
}
const filterNode = (value: string, data: any) => {
  if (!value) return true
  return data.label.includes(value)
}
 
const leftAllCheck = () => {
  const leftTree = leftTreeRef.value
  if (checkedLeft.value) {
    leftTree?.setCheckedNodes(leftTreeData.value)
    checkedLeft.value = true
  } else {
    leftTree?.setCheckedNodes([])
    checkedLeft.value = false
  }
}
const rightAllCheck = () => {
  const rightTree = rightTreeRef.value
  if (checkedRight.value) {
    rightTree?.setCheckedNodes(rightTreeData.value)
    checkedRight.value = true
  } else {
    rightTree?.setCheckedNodes([])
    checkedRight.value = false
  }
}
const removeChecked = (rightList, allCheckedKeys) => {
  rightList.forEach((e, index) => {
    if (allCheckedKeys.indexOf(e.id) == -1) {
      rightList.splice(index, 1)
    }
    if (e.children) {
      removeChecked(e.children, allCheckedKeys)
    }
  })
  return rightList
}
 
const recursionTree = (parents, allCheckedKeys) => {
  parents.forEach(e => {
    const list = lodash.filter(e.children, child => allCheckedKeys.indexOf(child.id) >= 0)
    e.children = list
    if (e.children.length !== 0) {
      recursionTree(e.children, allCheckedKeys)
    }
  })
  return parents
}
 
// 右移
const addHandle = async () => {
  const leftTree = leftTreeRef.value
  checkedLeft.value = false
  if (!leftTree) {
    return
  }
  const leftNodes = leftTree.getCheckedNodes(false, true)
  const parents = leftNodes.filter(
    el => el.children && el.children.length > 0 && el.parentId == '0'
  )
  const checkedKeys = leftTree.getCheckedKeys(false)
  const halfCheckedKeys = leftTree.getHalfCheckedKeys()
  const allCheckedKeys = halfCheckedKeys.concat(checkedKeys)
  const rightTree = rightTreeRef.value
  if (!rightTree) {
    let rightList = parents.map(parent => {
      const obj = lodash.omit(parent, ['children'])
      obj.children = lodash.filter(parent.children, child => allCheckedKeys.indexOf(child.id) >= 0)
      return obj
    })
 
    let copyRightList = lodash.cloneDeep(rightList)
    removeChecked(copyRightList, allCheckedKeys)
    rightTreeData.value.push(...copyRightList)
  } else {
    let isExist = false
    rightTree.data.forEach(e => {
      if (parents[0].id === (e as any).id) isExist = true
    })
    if (!isExist) {
      const overall = lodash.cloneDeep(parents)
      let rightList = await recursionTree(overall, allCheckedKeys)
      let copyRightList = lodash.cloneDeep(rightList)
      removeChecked(copyRightList, allCheckedKeys)
      rightTreeData.value.push(...copyRightList)
    } else {
      handleData(leftNodes, rightTree, allCheckedKeys)
    }
  }
  // 移过去之后要删除原本的值
  leftNodes.forEach(node => {
    leftTree.setChecked(node, false, false)
    if (checkedKeys.indexOf(node.id) >= 0) {
      leftTree.remove(node)
    }
  })
 
  leftOperation.value = formatTree(leftTree.getCheckedNodes(false) || [], 'parentId', 'id')
  emits('change', leftTreeData.value, rightTreeData.value)
  emits('add')
 
}
 
// 左移
const delHandle = async () => {
  checkedRight.value = false
  const rightTree = rightTreeRef.value
  if (!rightTree) {
    return
  }
  const rightNodes = rightTree.getCheckedNodes(false, true)
  const checkedKeys = rightTree.getCheckedKeys(false)
  const halfCheckedKeys = rightTree.getHalfCheckedKeys()
  const allCheckedKeys = halfCheckedKeys.concat(checkedKeys)
 
  const parents = lodash.filter(
    rightNodes,
    item => item.children && item.children.length > 0 && item.parentId == '0'
  )
  const leftTree = leftTreeRef.value
  if (!leftTree) {
    let leftList = parents.map(parent => {
      const obj = lodash.omit(parent, ['children'])
      obj.children = lodash.filter(parent.children, child => allCheckedKeys.indexOf(child.id) >= 0)
      return obj
    })
    let copyLeftList = lodash.cloneDeep(leftList)
    removeChecked(copyLeftList, allCheckedKeys)
    leftTreeData.value.push(...copyLeftList)
  } else {
    let isExist = false
    leftTree.data.forEach(e => {
      if (parents[0].id === (e as any).id) isExist = true
    })
    if (!isExist) {
      const overall = lodash.cloneDeep(parents)
      let leftList = await recursionTree(overall, allCheckedKeys)
      let copyLeftList = lodash.cloneDeep(leftList)
      removeChecked(copyLeftList, allCheckedKeys)
      rightTreeData.value.push(...copyLeftList)
    } else {
      handleData(rightNodes, leftTree, allCheckedKeys)
    }
  }
 
  rightNodes.forEach(node => {
    rightTree.setChecked(node, false, false)
    if (checkedKeys.indexOf(node.id) >= 0) {
      rightTree.remove(node)
    }
  })
 
  rightOperation.value = formatTree(rightTree.getCheckedNodes(false) || [], 'parentId', 'id')
 
  emits('change', leftTreeData.value, rightTreeData.value)
 
  emits('delete')
}
const handleData = (rightNodes, leftTree, allCheckedKeys) => {
  rightNodes.forEach(item => {
    if (item.children) {
      let parent = leftTree.getNode(item.parentId)
      let node = item
      if (!leftTree.getNode(item.id) && allCheckedKeys.indexOf(item.id) > 0) {
        const copyNode = lodash.cloneDeep(node)
        copyNode.children = []
        leftTree.append(copyNode, parent)
      }
      handleData(item.children, leftTree, allCheckedKeys)
    } else {
      let parent = leftTree.getNode(item.parentId)
      let node = item
      if (!leftTree.getNode(item.id) && allCheckedKeys.indexOf(item.id) > 0) {
        leftTree.append(node, parent)
      }
    }
  })
}
 
const roleDialogSubmit = () => {
  const rightList = treeToList(rightTreeData.value)
  grant({ roleIds: [props.nodeKey], menuIds: rightList.map(item => (item).id) }).then(
    res => {
      ElMessage({
        type: 'success',
        message: '授权成功!'
      })
    }
  )
}
</script>

CSS

<style lang="scss">
.v-transfer {
  width: 100%;
  height: 100%;
 
  .tree {
    .ep-tree__empty-block {
      text-align: center;
      color: #e5e6eb;
      position: relative;
 
      &::before {
        content: '';
        background-image: url(../../assets/img/empty.png);
        background-size: cover;
        width: 160px;
        height: 172px;
        position: absolute;
        top: 20px;
        left: 50%;
        transform: translateX(-50%);
      }
 
      .ep-tree__empty-text {
        position: absolute;
        top: 192px;
        left: 50%;
        transform: translateX(-50%);
      }
    }
  }
}
 
.bottomBtn {
  text-align: center;
}
</style>
 
<style lang="scss" scoped>
.v-transfer {
  display: flex;
  justify-content: flex-start;
  font-size: 16px;
 
  &-item {
    border: 1px solid #e5e6eb;
    border-radius: 2px;
    min-height: 200px;
    display: flex;
    flex-direction: column;
 
    .header {
      background: #f7f8fa;
      height: 40px;
      display: flex;
      align-items: center;
      // justify-content: center;
      padding: 0 16px;
      border-bottom: 1px solid #e5e6eb;
    }
 
    .content {
      background-color: #fff;
      flex: 1;
      padding: 16px;
 
      .seacrh-box {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: flex-start;
        margin-bottom: 16px;
 
        .ep-button {
          margin-left: 16px;
        }
      }
 
      .tree-box {
        height: 570px;
        overflow-y: auto;
      }
    }
  }
 
  &-left {
    width: 40%;
    height: calc(100% - 60px);
  }
 
  &-middle {
    width: 20%;
    height: calc(100% - 60px);
    text-align: center;
    margin: auto 0;
    position: relative;
 
    // .ep-button {
    //   margin-top: 10px;
    // }
    .middle-icon {
      position: absolute;
      top: 38%;
      left: 100px;
 
      div {
        width: 40px;
        height: 40px;
        background: #409eff;
        border-radius: 50%;
        color: #fff;
        cursor: pointer;
 
        &:first-child {
          margin-bottom: 40px;
        }
 
        svg {
          margin-top: 12px;
        }
      }
    }
  }
 
  &-right {
    width: 40%;
    height: calc(100% - 60px);
  }
 
  .empty-box {
    text-align: center;
    color: #86909c;
    margin-top: 40px;
  }
}
</style>

引用

<TreeTransfer
            ref="treeTransferRef"
            :nodeKey="roleId"
            :left-tree="leftTree"
            :right-tree="rightTree"
            :default-props="props"
            :leafsArr="leafsArr"
            :leftTitle="'左侧标题'"
            :rightTitle="'右侧标题'"
          />

效果

很简陋，待优化