Javascript vue.js table pagination, ajax asynchronous loading of data

Vue.component('pagination',{
    template:'#paginationTpl',
    replace:true,
    props:['cur','all','pageNum'],
    methods:{
      //页码点击事件
      btnClick: function(index){
        if(index != this.cur){
          this.cur = index;
        }
      }
    },
    watch:{
      "cur" : function(val,oldVal) {
        this.$dispatch('page-to', val);
      }
    },
    computed:{
      indexes : function(){
        var list = [];
        //计算左右页码
        var mid = parseInt(this.pageNum / 2);//中间值
        var left = Math.max(this.cur - mid,1);
        var right = Math.max(this.cur + this.pageNum - mid -1,this.pageNum);
        if (right > this.all ) { right = this.all}
        while (left <= right){
          list.push(left);
          left ++;
        }
        return list;
      },
      showLast: function(){
        return this.cur != this.all;
      },
      showFirst: function(){
        return this.cur != 1;
      }
    }
  });

<script type="text/template" id="paginationTpl">
  <nav v-if="all > 1">
    <ul class="pagination">
      <li v-if="showFirst"><a href="javascript:" @click="cur--">«</a></li>
      <li v-for="index in indexes" :class="{ &#39;active&#39;: cur == index}">
        <a @click="btnClick(index)" href="javascript:">{{ index }}</a>
      </li>
      <li v-if="showLast"><a @click="cur++" href="javascript:">»</a></li>
      <li><a>共<i>{{all}}</i>页</a></li>
    </ul>
  </nav>
</script>

<div id=&#39;item_list&#39;>
  ...
  <pagination :cur="1" :all="pageAll" :page-num="10" @page-to="loadList"></pagination>
</div>

var vm = new Vue({
    el: "#item_list",
    data: {
      items : [],
      //分页参数
      pageAll:0, //总页数,根据服务端返回total值计算
      perPage:10 //每页数量
    },
    methods: {
      loadList:function(page){
        var that = this;
        $.ajax({
          url : "/getList",
          type:"post",
          data:{"page":page,"perPage":this.perPage},
          dataType:"json",
          error:function(){alert('请求列表失败')},
          success:function(res){
            if (res.status == 1) {
              that.items = res.data.list;
              that.perPage = res.data.perPage;
              that.pageAll = Math.ceil(res.data.total / that.perPage);//计算总页数
            }
          }
        });
      },
      //初始化
      init:function(){
        this.loadList(1);
      }
    }
  });
  vm.init();