直接看代码,只需要让页数pageNum减去1后去乘以要展示的数量pageSize再加上当前索引值加1就可以

  <el-table :data="tableData" stripe class="table" ><el-table-column label="序号" type="index" width="100"><template #default="scope"><span>{{(pageNum - 1) * pageSize + scope.$index + 1}}</span></template></el-table-column><el-table-column label="名称" prop="title"></el-table-column></el-table><script lang="ts" setup>import { ref} from "vue";const pageSize = ref(10)const pageNum = ref(1)</script>