vue+elementUI分页效果

<div class="deit">
    <div class="crumbs">
      <el-breadcrumb separator="/">
            <el-breadcrumb-item><i class="el-icon-date"></i> 数据管理</el-breadcrumb-item>
            <el-breadcrumb-item>用户列表</el-breadcrumb-item>
        </el-breadcrumb>
        <div class="cantainer">
                    <el-table style="width: 100%;" border class="tabBg"
                    :data="allList.slice((currentPage-1)*pagesize,currentPage*pagesize)"  //当后端返回所有的数据时对数据的处理，最为重要的一句代码，如果是通过pageSize，和currentpage返回的数据就不需要这么写，直接写他的dateList就行。
                    >
                        <el-table-column type="index" width="50">    
                        </el-table-column>
                        <el-table-column label="日期" prop="date" width="180" header-align="center" align="center">    
                        </el-table-column>
                        <el-table-column label="用户姓名" prop="name" width="180">    
                        </el-table-column>
                        <el-table-column label="邮箱" prop="email" width="180">    
                        </el-table-column>
                        <el-table-column label="地址" prop="address" width="200">    
                        </el-table-column>    
                    </el-table>
                        <el-pagination
                            @size-change="handleSizeChange"
                            @current-change="handleCurrentChange"
                            :current-page="currentPage"
                            :page-sizes="[5, 10, 20, 40]" //这是下拉框可以选择的，每选择一行，要展示多少内容
                            :page-size="pagesize"         //显示当前行的条数
                            layout="total, sizes, prev, pager, next, jumper"
                            :total="userList.length">    //这是显示总共有多少数据，
                    </el-pagination>
        </div>
    </div>
  </div>
  
  
data () {
      return {
                currentPage:1, //初始页
                pagesize:10,    //    每页的数据　　　　　　　　　　
　　　　　　　　　 allList: [] 
　　　　　　　　}
　　　　 },
  
  
    created() {
        this.handleallList()
    },
    methods: {
        // 初始页currentPage、初始每页数据数pagesize和数据data
        handleSizeChange: function (size) {
                this.pagesize = size;
                console.log(this.pagesize)  //每页下拉显示数据
        },
        handleCurrentChange: function(currentPage){
                this.currentPage = currentPage;
                console.log(this.currentPage)  //点击第几页
        },
        handleUserList() {
            this.$http.get('http://localhost:3000/userList').then(res => {  //这是从本地请求的数据接口，
                this.allList = res.body
            })
        }
    }
 <br><br>style{<br>.tabBg .el-table_header-wrapper .has-gutter tr:nth-of-type(1) th{<br>  background-color: #eaeff5;<br>  color:#333;<br>}<br>}