el-table 记住选中状态

<el-table
      :row-key="(row) => row.id"
      ref="multipleTable"
      :data="tableData"
      @selection-change="handleSelectionChange"
    >
      <el-table-column type="selection" :reserve-selection="true">
      </el-table-column>
 	...........
    </el-table>

1,el-table加上行唯一id :row-key="(row) => row.id" 注：id是该行唯一值
2，在选项列中加上 :reserve-selection=“true”
主要是以上两个属性，记住状态的关键