Vue implements tree table through element tree control

<template>
    <div class="mytree">
          <el-tree
              :data="tree_data"
              :props="defaultProps"
              @node-click="handleNodeClick"
              indent="0"
              :render-content="renderContent"
          ></el-tree>
        </div>
</template>
<script lang="ts">
import { defineComponent, ref } from 'vue'
export default defineComponent({
    components: {},
    data() {
        return {
              tree_data: [
        {
          // type:1,
          label: 'notice-id1',
                  children: [
                        {
                          label: ['Satellite name code', 'ZOHREH-2'],
                        },
                        {
                          label: ['Organization', 'IRN'],
                        },
                        {
                          label: ['Frequency range', '10950-1450'],
                        },
                        {
                          label: '[upper row] beam name',
                          children: [
                              {
                                  label:['name','RS49'],
                              },
                             {
                                  label:['freq_min','10950'],
                              },
                             {
                                  label:['freq_max','14500'],
                              },
                              {
                                  label:[]'group('+'3'+')','']
                                  children:[
                                     {
                                        label:['10600361','10950','11200','0']
                                     },
                                    {
                                        label:['10600361','10950','11200','0']
                                     },
                                    {
                                        label:['10600361','10950','11200','0']
                                     }
                                  ]
                              }
                      ]
                    },
                  ],
                },
              ],
            defaultProps: {
            children: 'children',
            label: 'label',
          },
        }
    },
    method:{
    // Custom tree control function node represents each node renderContent(h,{node,data,store}){
        //div represents a row of the tree control, and div contains three span tags // Determine the number of label arrays of the node and select the class through ternary operation
        // Set the class to control the alignment of the tree control return h('div',[
          h('span', {class:node.label.length === 2 ? 'nodeStyle':'groupStyle'},node.label[0]),
          h('span', {class:'groupStyle'},node.label[1]),
          h('span',{class:node.label.length === 2 ? 'nodeStyle':'groupStyle'},node.label.length === 2 ? '':node.label[2])
          ]);
    },
    }
})
</script>
<style lang="scss" scoped>
.nodeStyle{
  width:110px;
  display:inline-block;
  text-align:left;
}
.groupStyle{
  width:150px;
  display:inline-block;
  text-align:left;
}
</style>