Element tree-shaped lazy loading table, refresh the list when the data changes

Write a small demo

html

<div id="app">
<template>
<div>
  <el-button @click="handletest">123</el-button>
    
  <el-table
    :data="tableData1"
    style="width: 100%"
    row-key="id"
    ref="tableDom"
    border
    lazy
    :load="load"
    :tree-props="{children: 'children', hasChildren: 'hasChildren'}">
    <el-table-column
      prop="date"
      label="日期"
      width="180">
    </el-table-column>
    <el-table-column
      prop="name"
      label="姓名"
      width="180">
    </el-table-column>
    <el-table-column
      prop="address"
      label="地址">
    </el-table-column>
  </el-table>
</div>
</template>
</div>

js

var Main = {
    data() {
      return {
        tableData: [{
          id: 1,
          date: '2016-05-02',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1518 弄'
        }, {
          id: 2,
          date: '2016-05-04',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1517 弄'
        }, {
          id: 3,
          date: '2016-05-01',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1519 弄',
          children: [{
              id: 31,
              date: '2016-05-01',
              name: '王小虎',
              address: '上海市普陀区金沙江路 1519 弄'
            }, {
              id: 32,
              date: '2016-05-01',
              name: '王小虎',
              address: '上海市普陀区金沙江路 1519 弄'
          }]
        }, {
          id: 4,
          date: '2016-05-03',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1516 弄'
        }],
        tableData1: [{
          id: 1,
          date: '2016-05-02',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1518 弄'
        }, {
          id: 2,
          date: '2016-05-04',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1517 弄'
        }, {
          id: 3,
          date: '2016-05-01',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1519 弄',
          hasChildren: true
        }, {
          id: 4,
          date: '2016-05-03',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1516 弄'
        }]
      }
    },
    methods: {
      handletest(){
        console.log(this.$refs.tableDom.store.states.lazyTreeNodeMap)
        this.$set(this.$refs.tableDom.store.states.lazyTreeNodeMap, 3, [
            {
              id: 65,
              date: '2016-05-01',
              name: '王小虎',
              address: '上海市普陀区金沙江路 1519 弄',
              hasChildren: true
            }, {
              id: 43,
              date: '2016-05-01',
              name: '王小虎',
              address: '上海市普陀区金沙江路 1519 弄'
            }
          ]);
      },
      load(tree, treeNode, resolve) {
        console.log("resolve",resolve)
        setTimeout(() => {
          resolve([
            {
              id: 31,
              date: '2016-05-01',
              name: '王小虎',
              address: '上海市普陀区金沙江路 1519 弄'
            }, {
              id: 32,
              date: '2016-05-01',
              name: '王小虎',
              address: '上海市普陀区金沙江路 1519 弄'
            }
          ])
        }, 1000)
      }
    },
  }
var Ctor = Vue.extend(Main)
new Ctor().$mount('#app')

If the tree node has been opened, replace the child nodes in the node (handleTest method) otherwise there is no data in this.$refs.tableDom.store.states.lazyTreeNodeMap