vue+element-ui实现表格的拖拽排序

import sortable from "sortable.js"; //引入的npm
 methods:{
     //议题排序
     tableSort(){
         const tbody = document.querySelector('.el-table_body-wrapper tbody');
         console.log('tbody',tbody)
         let ops = {
             onEnd:(evt)={
                 const arrsp = this.tableData.splice(evt.oldIndex,1)[0];
                 this.tableData.splice(evt.newIndex,0,arrsp);
                 console.log('this.tableData',this.tableData)
                 this.$forceUpdate();
             },
         }
         sortable.create(tbody,ops);
     },
 }
 watch:{
     tableData:{
         immediate:false,
         handler(){
             const tbody = document.querySelector('.el-table_body-wrapper tbody');
             console.log(tbody);        }
         let ops = {
             onEnd:(evt)={
                 const arrsp = this.tableData.splice(evt.oldIndex,1)[0];
                 this.tableData.splice(evt.newIndex,0,arrsp);
                 console.log('this.tableData',this.tableData)
                 this.$forceUpdate();
             }
         }
         sortable.create(tbody,ops);
     }
 },
 mounted(){
     this.tableSort();
 },