element el-table 表格限制多选个数功能

//tabel表格相关代码
	<div class="top layout-start margin_b_10">
      <el-button
        color="#255EFF"
        @click="compare"
        :disabled="compareFileArr.data.length !== 2"
        >版本对比</el-button
      >
      <span>（请选择两个文件版本进行对比）</span>
    </div>
    <el-table
      ref="multipleTableRef"
      @select="select"
      :data="tableData"
      style="width: 100%"
      :header-cell-class-name="cellClass"
      :header-cell-style="{ background: '#F3F3F3' }"
      border
    >
      <el-table-column type="selection" align="center" width="50" />
      <el-table-column label="版本" show-overflow-tooltip>
        <template #default="scope">{{ scope.row.name }}</template>
      </el-table-column>
      <el-table-column property="address" label="md5" width="100" />
      <el-table-column property="address" label="状态" width="100" />
      <el-table-column property="address" label="发布描述" width="100" />
      <el-table-column property="date" label="最后更新时间" width="200" />
      <el-table-column property="address" label="最后更新人" width="100" />
      <el-table-column property="操作" width="300" align="center">
        <template #default>
          <div>
            <el-button link type="primary" size="small">编辑</el-button>
            <el-button link type="primary" size="small">回退</el-button>
            <el-button link type="primary" size="small">下载</el-button>
          </div>
          <div>
            <el-button link type="primary" size="small">设置全服标签</el-button>
            <el-button link type="primary" size="small"
              >添加到待发布配置</el-button
            >
          </div>
        </template>
      </el-table-column>
    </el-table>
// 当用户手动勾选数据行的 Checkbox 时触发的事件
select(selections, row) {
  // 选择项大于2时
  if (selections.length > selectionMax) {
    // 把数组的第一个元素从其中删除
    let del_row = selections.shift();
    // 用于多选表格，切换某一行的选中状态，如果使用了第二个参数，则是设置这一行选中与否（selected 为 true 则选中）
    this.$refsmultipleTableRef.toggleRowSelection(del_row, false);
    compareFileArr.data = selections;
  } else {
    compareFileArr.data = selections;
  }
}

::v-deep .el-table__header-wrapper  .el-checkbox{
	display:none
}