vue+Element-ui实现分页效果

<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%;"
          :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
      })
    }
 }