element-table表格组件分页后完整导出到excel的方法

　　　　<el-table
          ref="filterTable"
          @row-click="rowClickHandle"
          :data="tableData.slice((currentPage - 1) * pageSize, currentPage * pageSize)"     //数据分页显示
        >
          <el-table-column
            show-overflow-tooltip
            prop="name"
            label="名称"
          ></el-table-column>
          <el-table-column
            show-overflow-tooltip
            prop="address"
            label="地址"
          ></el-table-column>
          <el-table-column show-overflow-tooltip label="状态">
            <template slot-scope="scope">
              <span v-if="scope.row.statu == 0">待完成</span>
              <span v-if="scope.row.statu == 1">已完成</span>
            </template>
          </el-table-column>
          <el-table-column
            show-overflow-tooltip
            label="操作"
            v-if="oprationShow"
          >
            <template slot-scope="scope">
              <span
                style="cursor: pointer"
                @click.stop="edit(scope)"
                >编辑</span
              >
              <span
                style="cursor: pointer"
                @click.stop="del(scope)"
                >删除</span
              >
            </template>
          </el-table-column>
        </el-table>
        <el-pagination
          layout="total,prev, pager, next"
          :total="total"
          :page-size="pageSize"
          @current-change="changePage"
        >
        </el-pagination>

  onExport() {
        this.oprationShow = false    //不显示操作按钮
        this.pageSize = this.total    //将表格长度变成数据总长度
        this.currentPage = 1          //显示第一页
        this.$nextTick(function () {
          let wb = XLSX.utils.table_to_book(this.$refs.filterTable.$el);
          let wbout = XLSX.write(wb, { bookType: ‘xlsx‘, bookSST: true, type: ‘array‘ });
          try {
            _global.saveAs(new Blob([wbout], { type: ‘application/octet-stream‘ }), ‘表格.xlsx‘)
          } catch (e) {
            if (typeof console !== ‘undefined‘) console.log(e, wbout)
          }
          this.pageSize = 13    //表格长度还原
          this.oprationShow = true   //显示操作按钮
          return wbout;
        })
   },