elementui之el-table如何通过v-if控制按钮显示与隐藏

 <el-row>
            <el-table :data="tableData" style="width: 100%;" row-key="id" :tree-props="{children: 'children', hasChildren: 'hasChildren'}">
                        <el-table-column prop="privilegeName" label="权限名称" >
                        </el-table-column>
                        <el-table-column prop="privilegeCode" label="权限编码" >
                        </el-table-column>
                        <el-table-column prop="privilegeType" label="权限类别" :formatter="formatPrivilegeType" >
                        </el-table-column>
 
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                                <el-button  v-if="scope.row.privilegeType === '1' || scope.row.privilegeType === '2'" type="primary" size="mini" @click="toAdd(scope)">新增</el-button>
                                <el-button type="primary" size="mini" @click="toEdit(scope)">编辑</el-button>
                            </template>
                        </el-table-column>
                    </el-table>
                    <br>
                    <el-pagination
                        @size-change="handleSizeChange"
                        @current-change="handleCurrentChange"
                        :current-page="pagination.pageIndex"
                        :page-sizes="[5, 10, 20, 30, 40]"
                        :page-size=pagination.pageSize
                        layout="total, prev, pager, next"
                        :total=pagination.total>
                    </el-pagination>
        </el-row>