<template>
  <div class="app-container home">
    <el-table
      class="t1"
      ref="dragTable"
      :data="tableData"
      row-key="id"
      border
      :row-class-name="tableRowClassName"
    >
      <el-table-column prop="date" label="日期"></el-table-column>
      <el-table-column prop="name" label="姓名"></el-table-column>
      <el-table-column prop="address" label="地址"></el-table-column>
      <el-table-column label="操作">
        <template #default="scope">
            <el-button class="move" type="text" size="small">拖 拽</el-button>    
        </template>
      </el-table-column>
    </el-table>
  </div>
</template>

<script setup>
import Sortable from "sortablejs";
const { proxy } = getCurrentInstance();
const data = reactive({
  tableData: [
        {
          id: "1",
          name: "text_1",
          date: "1111-11-11",
          address: "测试_1",
        },
        {
          id: "2",
          name: "text_2_不可拖拽",
          date: "2222-22-22",
          address: "测试_2_不可拖拽",
          disabled: true,
        },
        {
          id: "3",
          name: "text_3",
          date: "3333-33-33",
          address: "测试_3",
        },
        {
          id: "4",
          name: "text_4",
          date: "4444-44-44",
          address: "测试_4",
        },
        {
          id: "5",
          name: "text_5",
          date: "5555-55-55",
          address: "测试_5",
        }
      ]

});

const { tableData } = toRefs(data);

// 创建sortable实例
function initSortable (className){
      // 获取表格row的父节点
      const table = document.querySelector('.' + className + ' .el-table__body-wrapper tbody');
      // 创建拖拽实例
      let dragTable = Sortable.create(table, {
        animation: 150, //动画
        disabled: false, // 拖拽不可用? false 启用（刚刚渲染表格的时候起作用，后面不起作用）
        handle: ".move", //指定拖拽目标，点击此目标才可拖拽元素(此例中设置操作按钮拖拽)
        filter: ".disabled", //指定不可拖动的类名（el-table中可通过row-class-name设置行的class）
        dragClass: "dragClass", //设置拖拽样式类名
        ghostClass: "ghostClass", //设置拖拽停靠样式类名
        chosenClass: "chosenClass", //设置选中样式类名
        // 开始拖动事件
        onStart: () => {
          console.log("开始拖动");
        },
        // 结束拖动事件
        onEnd: ({ newIndex, oldIndex }) => {
          console.log(
            "结束拖动",
            `拖动前索引${oldIndex}---拖动后索引${newIndex}`
          );
          const currRow = tableData.value.splice(oldIndex, 1)[0];
          tableData.value.splice(newIndex, 0, currRow);
          console.log(
            "结束拖动",tableData.value);
        },
      });
};
// 设置表格row的class
function tableRowClassName ({ row })  {
      if (row.disabled) {
        return "disabled";
      }
      return "";
};
onMounted(() => {
  initSortable('t1')
})

</script>

<style lang='scss' scope>
// 拖拽
.dragClass {
  background: rgba($color: #41c21a, $alpha: 0.5) !important;
}
// 停靠
.ghostClass {
  background: rgba($color: #6cacf5, $alpha: 0.5) !important;
}
// 选择
.chosenClass:hover > td {
  background: rgba($color: #f56c6c, $alpha: 0.5) !important;
}
</style>

报错
Sortable: el must be an HTMLElement, not [object Null]
解决：表格加载完后再调用

import {nextTick} from 'vue';
onMounted(async () => {
  nextTick(() => {
    initSortable('t1');
  });
});