easyui datagrid 后台分页，前端如何处理

module.exports = {
    queryMethod(){
        let params = checkQueryParams.call(this);
        if (!params) {
            return;
        }
       //ajax请求，$UPost,$UConfApi是我在项目中封装好的方法，其实就是调取后台接口，$UPost是一个promise对象，所以可以用then（）方法，params是传给后台的参数
        return $UPost($UConfApi('H_Log_Operate'), params).then(result => {  //es6箭头函数的写法
            if (!result || result.rows < 1) {
                return alert(“无查询结构！”);
            }
            let pager = $('#grid').datagrid('getPager');
            pager.pagination('refresh', {
                total:result.results
            });
            pager.pagination({
                onSelectPage: function (pageNum, pageSize) {
                    let start = parseInt(pageNum-1)*parseInt(pageSize);
                    let limit = parseInt(pageSize);
                    //再次调用接口，取到新数据
                    $UPost($UConfApi('H_Log_Operate'), {start:start,limit:limit}).then(result => {
                        let data = result.rows;
                        $('#grid').datagrid('loadData',data);
                        pager.pagination('refresh', {
                            total:result.results,
                            pageNumber: pageNum,
                            pageSize: pageSize
                        });
                    })

                }
            });
        })

    },
}

//获取参数

function checkQueryParams() {
   
    let {
        LangCommon: lang,
        LangUser
    } = $ULanguage();
    let {
        starttime,
        endtime,
        accountid,
        start = 0,
        limit
    } = this;
    accountid = $('#accountid').textbox('getText');
    starttime = $("#range-time-start").val();
    endtime = $("#range-time-end").val();
    let shortName = $("#shortname").combobox('getText');
    if(!shortName){
        return $UToolAlert(LangUser.shortname_null);
    }
    if (!accountid) {
        return $UToolAlert(lang.exist);
    }
    if (!starttime || !endtime) {
        return $UToolAlert(lang.dateHint)
    }
    //分页相关内容start

    let opts = $('#grid').datagrid('options');
    let pager = $('#grid').datagrid('getPager');

    pager.pagination({
        onSelectPage: function (pageNum, pageSize) {
            opts.pageNumber = pageNum;
            opts.pageSize = pageSize;
        }
    });
    start = parseInt(opts.pageNumber-1)*parseInt(opts.pageSize);
    limit = parseInt(opts.pageSize);

//分页相关内容end

    return {
        starttime,
        endtime,
        accountid,
        start,
        limit
    };
}