1.前端后台管理会存在很多表格,表格数据过多就需要分页;
2.前端交互每次搜索如果都请求服务器会加大服务器的压力,所以在数据量不是很大的情况下可以一次性将数据返回,前端做检索
3.下面贴上一个demo

    <template>
    <div>
      <el-input v-model="tableDataName" placeholder="请输入姓名" style="width:240px"></el-input>
      <el-button type="primary" @click="doFilter">搜索</el-button>
      <el-button type="primary" @click="openData">展示数据</el-button>
      <el-table
        :data="tableDataEnd"
        border
        style="width: 100%">
        <el-table-column
          prop="date"
          label="日期"
          width="180">
        </el-table-column>
        <el-table-column
          prop="name"
          label="姓名"
          width="180">
        </el-table-column>
        <el-table-column
          prop="address"
          label="地址">
        </el-table-column>
      </el-table>
      <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="currentPage"
          :page-sizes="[1, 2, 3, 4]"
          :page-size="pageSize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="totalItems">
        </el-pagination>
    </div>
    </template>
    
    <script>
    export default {
      data() {
        return {
          tableDataBegin: [
            {
              date: "2016-05-01",
              name: "王小虎",
              address: "上海市普陀区金沙江路 1518 弄"
            },
            {
              date: "2016-05-02",
              name: "王小虎",
              address: "上海市普陀区金沙江路 1517 弄"
            },
            {
              date: "2016-05-03",
              name: "王二虎",
              address: "上海市普陀区金沙江路 1519 弄"
            },
            {
              date: "2016-05-04",
              name: "王二虎",
              address: "上海市普陀区金沙江路 1516 弄"
            },
            {
              date: "2016-05-05",
              name: "王三虎",
              address: "上海市普陀区金沙江路 1518 弄"
            },
            {
              date: "2016-05-06",
              name: "王三虎",
              address: "上海市普陀区金沙江路 1517 弄"
            },
            {
              date: "2016-05-07",
              name: "王小虎",
              address: "上海市普陀区金沙江路 1519 弄"
            },
            {
              date: "2016-05-08",
              name: "王小虎",
              address: "上海市普陀区金沙江路 1516 弄"
            }
          ],
          tableDataName: "",
          tableDataEnd: [],
          currentPage: 4,
          pageSize: 2,
          totalItems: 0,
          filterTableDataEnd:[],
          flag:false
        };
      },
      created() {
        this.totalItems = this.tableDataBegin.length;
        if (this.totalItems > this.pageSize) {
          for (let index = 0; index < this.pageSize; index++) {
            this.tableDataEnd.push(this.tableDataBegin[index]);
          }
        } else {
          this.tableDataEnd = this.tableDataBegin;
        }
      },
      methods: {
        //前端搜索功能需要区分是否检索,因为对应的字段的索引不同
        //用两个变量接收currentChangePage函数的参数
        doFilter() {
          if (this.tableDataName == "") {
            this.$message.warning("查询条件不能为空！");
            return;
          }
          this.tableDataEnd = []
          //每次手动将数据置空,因为会出现多次点击搜索情况
          this.filterTableDataEnd=[]
          this.tableDataBegin.forEach((value, index) => {
            if(value.name){
              if(value.name.indexOf(this.tableDataName)>=0){
                this.filterTableDataEnd.push(value)
              }
            }
          });
          //页面数据改变重新统计数据数量和当前页
          this.currentPage=1
          this.totalItems=this.filterTableDataEnd.length
          //渲染表格,根据值
          this.currentChangePage(this.filterTableDataEnd)
          //页面初始化数据需要判断是否检索过
          this.flag=true
        },
        openData() {},
        handleSizeChange(val) {
         console.log(`每页 ${val} 条`);
  this.pageSize = val;
  this.handleCurrentChange(1);
},


handleCurrentChange(val) {
  console.log(`当前页: ${val}`);
  this.currentPage = val;
  //需要判断是否检索
  if (!this.flag) {
    this.currentChangePage(this.tableDataBegin);
    console.log(this.tableDataEnd);
  } else {
    this.currentChangePage(this.filterTableDataEnd);
    console.log(this.tableDataEnd);
  }
},//组件自带监控当前页码

 currentChangePage(list) {
  let from = (this.currentPage - 1) * this.pageSize;
  let to = this.currentPage * this.pageSize;
   this.tableDataEnd = [];
   for (; from < to; from++) {
     if (list[from]) {
        this.tableDataEnd.push(list[from]);
     }
   }
   }
  }
  };
 </script>