vue element 做表格分页

<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=" 100%;"
                    :data="userList.slice((currentPage-1)*pagesize,currentPage*pagesize)"  //对数据请求的处理，最为重要的一句话
                    >
                        <el-table-column type="index" width="50">    
                        </el-table-column>
                        <el-table-column label="日期" prop="date" width="180">    
                        </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
                userList: []
      }
  },

　　

created() {
        this.handleUserList()
    },
    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.userList = res.body
            })
        }
    }