<div v-if="scope.row.isExpend == 'father'">                             <el-button size="small" @click="handleConnectionSearch(scope.row)">    {{scope.row.expanded?'收起':'展开'}}                               </el-button>                         </div>   　　handleConnectionSearch(row) {             row.expanded = !row.expanded;             this.$refs.topicTable.toggleRowExpansion(row, row.expanded) // 点击button展开         },