vue实现页面滚动到底部刷新

 <script>    var app = new Vue({      el: '#app',      data: {        swiper: null,        carousel: [],        promotion: [],        cates: [],        //设置size初始为10        size:10,      },      mounted: function () {        //定义that用that.size获取size的值        var that=this;        getPromotion();        //秒表每秒请求一次        setInterval(function(){          //content是div类名          const el = document.querySelector('.content');          const offsetHeight = el.offsetHeight;          el.onscroll = () => {            const scrollTop = el.scrollTop;            const scrollHeight = el.scrollHeight;            if ((offsetHeight + scrollTop) - scrollHeight >= -1) {              //每次滚动到底部size+10              that.size+=10;            }          }          $.ajax({            type: "post",            url: "/news/search",            data: {intro: 'best', page: 1, size: that.size},            dataType: 'json',            success: function (data) {              $.hideIndicator();              if (data.errCode === 1) {                app.promotion = data.data.articleList;                // console.log(222);              } else {                $.toast(data.errMsg);              }            }          });        },10*60);        // window.addEventListener('scroll', this.scrollBottom());      },      methods: {        goDetail: function (id) {          location.href = '/news/newsDetail/' + id;        },        },     });    //第一次加载先获取10条    function getPromotion() {      $.ajax({        type: "post",        url: "/news/search",        data: {intro: 'best', page: 1, size: 10},        dataType: 'json',        success: function (data) {          $.hideIndicator();          if (data.errCode === 1) {            app.promotion = data.data.articleList;            // console.log(data);          } else {            $.toast(data.errMsg);          }        }      });      $.showIndicator();    }</script>

public function search()  {    $parm = array('act' => 'search');    if (!empty($_POST['catId'])) $parm['catId'] = $_POST['catId'];    if (!empty($_POST['keyword'])) $parm['keyword'] = $_POST['keyword'];    if (!empty($_POST['intro'])) $parm['intro'] = $_POST['intro'];    if (!empty($_POST['order'])) $parm['order'] = $_POST['order'];    if (!empty($_POST['sort'])) $parm['sort'] = $_POST['sort'];    if (!empty($_POST['page'])) $parm['page'] =1;    //获取前台传过来的size值如果不为空就设置请求接口时多一个size参数    if (!empty($_POST['size'])) $parm['size'] = $_POST['size'];    //调用接口    $data = $this->http('service/article.php', $parm);    echo json_encode($data);  }