穿梭树及显示效果

实现代码
<template>
<div style="height:300px">
<el-scrollbar>
<el-tree ref="showTree" :data="showNewTree" :expand-on-click-node="false" default-expand-all node-key="id" highlight-current empty-text="">
<span slot-scope="{
{node}}">
<span>{
{node.label}}</span>
<span>
<i class="yi-del" @click="showRemove(node)"
</span>
</span>
</el-tree>
</el-scrollbar>
</div>
<el-dialog title="添加访问端" @close="handleClose">
<el-row>
<el-col :span="10">
<div style="height:300px">
<el-scrollbar>
<el-tree ref="tree" :data="oldTree" :show-checkbox="true" default-expand-all node-key="id" highlight-current/>
</el-scrollbar>
</div>
</el-col>
<el-col :span="4">
<el-button @click="opera">
</el-button>