vue el-tree树形三级穿梭框 上下位移删除子节点获取元素idJSON格式_el-tree穿梭框

基于element-ui的tree组件合成的穿梭框，包含上下位移删除子节点

<template>
  <div class="container">
     <div class="trees">
       <div class="treeP">
           <p class="title">
              <label class="la">
                 <span>
                    <el-checkbox v-model="checked" @change="checkedAll()">全选</el-checkbox>
                 </span>
              </label>
           </p>
           <div class="tree1">
              <el-tree
                :data="data"
                show-checkbox
                node-key="id"
                default-expand-all
                ref="tree"
                >
              </el-tree>
          </div>
       </div>
         
          <div class="btn">
             <el-button type="primary" @click="btn" icon="el-icon-arrow-right" circle></el-button>
          </div>
          <div class="treeP">
            <p class="title">
              <label class="la">
                 <span class="quit" @click="quit">
                    清空
                 </span>
              </label>
            </p>
             <div class="tree1">
               <el-tree
                 :data="data1"
                 node-key="id"
                 draggable
                 default-expand-all
                 :expand-on-click-node="true">
                <span class="custom-tree-node" slot-scope="{ node, data }">
                  <span>{{ node.label }}</span>
                  <span>
                    <el-button
                      type="text"
                      size="mini"
                      @click="() => remove(node, data)">
                      删除
                    </el-button>
                  </span>
                </span>
               </el-tree>
             </div>
          </div>
          
     </div>
     <div style="width:50px;margin:30px auto;">
        <el-button type="primary" @click="ti">提交</el-button>
     </div>
     
  </div>
</template>


<script>
  export default {
    data() {
      return {
        checked:false,
        checked2:false,
        data1:[],
        data: [{
          id: 1,
          label: '一级 1',
          children: [
            {
              id: 4,
              label: '二级 1-1',
               children:[
                 {
                   id:11,
                   label: '三级 1-1-1'
                 },
                 {
                   id:12,
                   label: '三级 1-1-2'
                 },
               ]
            },
            {
              id: 5,
              label: '二级 1-2',
               children:[
                 {
                   id:13,
                   label: '三级 1-2-1'
                 },
                 {
                   id:14,
                   label: '三级 1-2-2'
                 },
               ]
            },
          ]
        }, {
          id: 2,
          label: '一级 2',
          children: [
            {
            id: 6,
            label: '二级 2-1',
             children:[
                 {
                   id:15,
                   label: '三级 2-1-1'
                 },
                 {
                   id:16,
                   label: '三级 2-1-2'
                 },
               ]
            },
            {
            id: 7,
            label: '二级 2-2',
             children:[
                 {
                   id:17,
                   label: '三级 2-2-1'
                 },
                 {
                   id:18,
                   label: '三级 2-2-2'
                 },
               ]
            }
          ]
        }, {
          id: 3,
          label: '一级 3',
          children: [{
            id: 8,
            label: '二级 3-1',
             children:[
                 {
                   id:19,
                   label: '三级 3-1-1'
                 },
                 {
                   id:20,
                   label: '三级 3-1-2'
                 },
               ]
            },
            {
            id: 9,
            label: '二级 3-2',
             children:[
                 {
                   id:21,
                   label: '三级 3-2-1'
                 },
                 {
                   id:22,
                   label: '三级 3-2-2'
                 },
               ]
            },
           {
            id: 10,
            label: '二级 3-3',
             children:[
                 {
                   id:23,
                   label: '三级 3-3-1'
                 },
                 {
                   id:24,
                   label: '三级 3-3-2'
                 },
               ]
          },]
        }],
        vuetree: [],
        defaultProps: {
          children: 'children',
          label: 'label'
        },
      };
    },
    methods: {
      remove(node, data) {
        const parent = node.parent;
        const children = parent.data.children || parent.data;
        const index = children.findIndex(d => d.id === data.id);
        children.splice(index, 1);
      },
      checkedAll(){
        this.checked ?  this.$refs.tree.setCheckedNodes(this.data) : this.$refs.tree.setCheckedKeys([]);
      },
      quit(){
        this.data1 = []
      },
      btn(){
         var arrs = JSON.parse(JSON.stringify(this.getSimpleCheckedNodes(this.$refs.tree.store)))
        //  console.log(arrs)
         for(let i=arrs.length - 1; i>0;i--) {
            if(arrs[i].id === arrs[i-1].id){
              arrs[i-1].children.push(...arrs[i].children)
              arrs.splice(i,1)
            }
          }
         this.data1 = arrs
      },
      getSimpleCheckedNodes(store) {
        const checkedNodes = [];
        const traverse = function(node) {
          const childNodes = node.root ? node.root.childNodes : node.childNodes;
          childNodes.forEach(child => {
            if (child.checked) {
              // console.log(child)
              if(child.childNodes.length>0){
              //  console.log(child.data)
                if(child.parent.parent == null){
                   checkedNodes.push(child.data);
                }else{
                     var arr = JSON.parse(JSON.stringify(child.parent.data))
                   var obj = child.data
                   arr.children.length = 0
                   arr.children.push(obj)
                   checkedNodes.push(arr);
                }
              }else{
                // 判断第二级菜单！！！
                if(!child.data.children){
                  var arrP = JSON.parse(JSON.stringify(child.parent.parent.data))
                  var arr = JSON.parse(JSON.stringify(child.parent.data))
                  var obj = child.data
                  arrP.children.length = 0
                  arr.children.length = 0
                  arr.children.push(obj)
                  arrP.children.push(arr)
                  checkedNodes.push(arrP);
                }
              }   
            }
            if (child.indeterminate) {
              traverse(child);
            }
          });
        };
        traverse(store)
        return checkedNodes;
      },
      ti(){
        var as = JSON.parse(JSON.stringify(this.data1))
        for(var item of as){
          delete item.label
           for(var list of item.children){
             delete list.label
             for(var i of list.children){
               delete i.label
             }
           }
        }
        console.log(JSON.stringify(as))
      }
    }
  };
</script>

<style>
.container{
    width: 1200px;
    height: 700px;
    margin:50px auto;
}
  .trees{
    width: 80%;
    margin: 0 auto;
    display: flex;
    justify-content: space-around;
  }
   .custom-tree-node {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 14px;
    padding-right: 8px;
  }
  .tree1{
    height: 500px;
    padding: 5px;
    overflow: scroll;
    overflow-x:hidden ;
  }
  .treeP{
    width:40%;border: 1px solid #ebeef5;border-radius:5px;
  }
  .title{
    height: 40px;
    background: #f5f7fa;
  }
  .la{
   line-height: 40px;padding:0 10px 0 10px;
  }
 .quit{
   font-size:14px;margin-left:83%;cursor: pointer;
 }
 .quit:hover{
   opacity: .5;
 }
 .btn{
     margin: auto; 
  }
</style>
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