element表格中展开行的下拉箭头，随意放在任何列

<el-table-column v-if="col.key === 'index'" :key="col.key" fixed label="序号" width="55" :type="col.type" align="center"> <template slot-scope="scope"> <span v-if="!scope.row._isChild">{{ getRowIndex(scope.row) }}</span> </template> </el-table-column> <!-- 主图列 --> <el-table-column v-else-if="col.key === 'image'" :key="col.key" :fixed="col.fixed" :type="" :label="col.label" :width="col.width" align="center"> <template slot-scope="scope"> <el-image v-if="scope.row.image" :src="scope.row.image" style="width: 50px; height: 50px; border-radius: 4px;" fit="cover" :preview-src-list="[scope.row.image]"> </el-image> <span v-else style="color: #C0C4CC; font-size: 12px;">无图片</span> </template> </el-table-column> <!-- 图纸列 --> <el-table-column v-else-if="col.key === 'drawing'" :key="col.key" :fixed="col.fixed" :label="col.label" :width="col.width" align="center"> <template slot-scope="scope"> <i v-if="scope.row.drawing" class="iconfont icon-ic_ysc ic_ysc"></i> <i v-else class="iconfont icon-ic_wsc"></i> </template> </el-table-column>

只需要在想要放在的列，前一列添加 type="" 就可以了