elementUI中table的折叠面板

<el-table :data="tableData" :expand-row-keys="expends" @current-change="toggleRowExpansion" :row-key="getRowKeys">
  <el-table-column type="expand" label="查看" width="100">
    <template slot-scope="scope">
        <div class="content">
            <div v-html="scope.row.notice_content"></div>
        </div>
       </template>
    </el-table-column>  
</el-table>

getRowKeys(row){
  return row.id
},//获取当前页的信息
toggleRowExpansion(row){
    this.expends=[];
    this.expends.push(row.id)//展开当前行的信息
},