需求：
后端一次性返回数据，前端实现分页效果，并且可以搜索，，最左边栏和最右边栏固定，当窗口缩小时，产生滚动条（自适应高度）

注: 代码解释在各行代码后的注释中
实现效果：

完整代码：

可直接复制使用

<template>
  <div style="background: #fff; padding: 20px; height: 70px">
    <!-- 搜索 -->
    <el-input
      v-model="searchKey"
      placeholder="搜索"
      style="width: 180px; float: left; margin-right: 10px"
    ></el-input>
    <!-- 表格 -->
    <el-table
      ref="table"
      :data="searchData"
      style="width: 100%"
      :height="tableHeight"
      :default-sort="{ prop: 'date', order: 'ascending' }"
    >
    <!-- 设置时间为刚进入页面的默认排序 -->
      <el-table-column label="姓名" prop="name" fixed="left" sortable>
      </el-table-column>
      <el-table-column label="时间" prop="date" sortable> </el-table-column>
      <el-table-column label="省份" prop="province"></el-table-column>
      <el-table-column label="省份" prop="province"></el-table-column>
      <el-table-column label="省份" prop="province"></el-table-column>
      <el-table-column label="省份" prop="province"></el-table-column>
      <el-table-column label="省份" prop="province"></el-table-column>
      <el-table-column label="省份" prop="province"></el-table-column>
      <el-table-column label="省份" prop="province"></el-table-column>
      <!-- 这里的省份对应的prop是重复的，为了产生滚动条效果，复制的，真实的数据不能设置重复的prop -->
      <el-table-column label="区域" prop="district" sortable :sort-method="(a, b) => sortMethod(a, b, 'district')"> </el-table-column>
      <el-table-column label="地址" prop="address" fixed="right" width="300">
        <div slot-scope="scope">
          {{ scope.row.address || "--" }}
        </div>
      </el-table-column>
    </el-table>
    <!--  分页-->
    <div class="page">
      <el-pagination
        ref="page"
        @size-change="sizeChange"
        :current-page="pageNow"
        @current-change="currentChange"
        :page-sizes="pageSizes"
        :page-size="pageSize"
        background
        :total="totalCount"
        layout="total, sizes, prev, pager, next, jumper"
      ></el-pagination>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      list: [
        {
          date: "2016-05-02",
          name: "王小虎1",
          province: "上海",
          district: "普陀区",
          address: "上海市普陀区金沙江路 1518 弄",
        },
        {
          date: "2016-05-04",
          name: "王小虎2",
          province: "上海",
          district: "普陀区",
          address: "上海市普陀区金沙江路 1517 弄",
        },
        {
          date: "2016-05-01",
          name: "王小虎3",
          province: "上海",
          district: "普陀区",
          address: "",
        },
        {
          date: "2016-05-03",
          name: "王小虎4",
          province: "上海",
          district: "普陀区",
          address: "上海市普陀区金沙江路 1516 弄",
        },
        {
          date: "2016-05-04",
          name: "王小虎5",
          province: "上海",
          district: "普陀区",
          address: "上海市普陀区金沙江路 1517 弄",
        },
        {
          date: "2016-05-01",
          name: "王小虎6",
          province: "上海",
          district: "普陀区",
          address: "上海市普陀区金沙江路 1519 弄",
        },
        {
          date: "2016-05-03",
          name: "王小虎7",
          province: "上海",
          district: "徐汇区",
          address: "上海市徐汇区金沙江路 1516 弄",
        },
        {
          date: "2016-05-04",
          name: "王小虎8",
          province: "上海",
          district: "普陀区",
          address: "上海市普陀区金沙江路 1517 弄",
        },
        {
          date: "2016-05-01",
          name: "王小虎9",
          province: "上海",
          district: "普陀区",
          address: "上海市普陀区金沙江路 1519 弄",
        },
        {
          date: "2016-05-03",
          name: "王小虎10",
          province: "上海",
          district: "普陀区",
          address: "上海市普陀区金沙江路 1516 弄",
        },
        {
          date: "2016-05-04",
          name: "王小虎11",
          province: "上海",
          district: "徐汇区",
          address: "上海市徐汇区金沙江路 1517 弄",
        },
      ],
      searchKey: "", //存储搜索的数据
      totalCount: 0, //总共的数据
      pageNow: 1, //默认显示第几页数据
      pageSize: 10,//这里是设置每一页显示多少条数据
      pageSizeNew:10, //这里是设置每一页显示多少条数据
      pageSizes: [10, 20, 30, 40, 50, 100],
      tableHeight: 0, //自定义高度
      allData: [], //存储做了分页后的数据
    };
  },
  created() {
    this.getTabelData();//分页
    this.tabHeight();//自适应高度
  },
  computed: {
    searchData() {
      if (!this.searchKey) {
        return this.allData; //如果输入框没有内容，则显示分页后的allData
      }
      // 这里是搜索框筛选判断，
      let resultList = this.list.filter(
        (data) =>
          !this.searchKey ||
          data.date.toLowerCase().includes(this.searchKey.toLowerCase()) ||
          // 搜索时间
          data.name.toLowerCase().includes(this.searchKey.toLowerCase())
          // 搜索名字
      );
      return resultList;//搜索是根据最初的数据去筛选的
    },
  },
  watch: {
    // 用watch是因为 计算属性中想更改这些数据，显示报错
    searchData: {
      deep: true,
      handler: function (newVal) {
        //是为了修改 输入框筛选后 分页中显示共多少条数据
        if (this.searchKey) {
          this.totalCount = newVal.length;
          this.pageSize = JSON.parse(JSON.stringify(newVal.length));
        }else{
          this.pageSize = this.pageSizeNew;
          this.totalCount = this.list.length;
        }
      }
    }
  },
  methods: {
  //设置分页
    getTabelData() {
      let data = JSON.parse(JSON.stringify(this.list));
      this.allData = data.splice(
        (this.pageNow - 1) * this.pageSizeNew,
        this.pageSizeNew
      );
      this.totalCount = this.list.length;
    },

    currentChange(val) {
      console.log("翻页，当前为第几页", val);
      this.pageNow = val;
      if (this.searchKey) {
        this.totalCount = this.searchData.length;
      }
      this.getTabelData();
    },
    //size改变时回调的函数，参数为当前的size
    sizeChange(val) {
      console.log("改变每页多少条，当前一页多少条数据", val);
      this.pageSizeNew = val;
      this.pageNow = 1;
       if (this.searchKey) {
        this.totalCount=this.searchData.length
      }
      this.getTabelData();
    },
    // 高度自适应
    tabHeight() {
      this.$nextTick(function () {
        this.tableHeight =
          window.innerHeight - this.$refs.table.$el.offsetTop - 100;
        // 监听窗口大小变化
        let self = this;
        window.onresize = function () {
          self.tableHeight =
            window.innerHeight - self.$refs.table.$el.offsetTop - 100;
        };
      });
    },
    //自定义排序
    sortMethod(obj1, obj2) {
      return obj2.district- obj1.district;
    },
  },
};
</script>
<style lang="scss" scoped>
</style>