1.滚动加载

function onScroll() {        if (this.curPage > this.totalPage) return;        var scrollTop = document.body.scrollTop || document.documentElement.scrollTop;        var scrollHeight = document.documentElement.scrollHeight || document.body.scrollHeight;        var windowHeight = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;        if (scrollTop + windowHeight > scrollHeight - 100) {            // flagData防止触发多次            if (!this.flagData) return;            this.flagData = false;            this.getSingerList();//请求数据成功后 page+1, this.flagData = true;        }    }

2.获取特定对象的值，key忽略大小写

let options={    shareUserId:123,}// let shareUserId=options.shareUserid||options.shareUserId||options.shareUserID;for (let item in options){    if(item.toLowerCase()=='shareuserid'){        let shareUserId=options[item];        console.log(shareUserId);//123    }}

3. 获取地址中的参数值

function getUrlParam(name, url) {  if (!url) url = location.href;  name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");  var regexS = "[\\?&]" + name + "=([^&#]*)";  var regex = new RegExp(regexS);  var results = regex.exec(url);  return results == null ? null : results[1];}

4.格式化时间

/** * 格式化时间 * @ date 时间参数，传入字符串 * @ fmt 时间显示格式，‘yyyy-MM-dd hh:mm:ss’ */function formatDate(time, fmt) {    if(!time) return '';    var date = new Date(time);    var o = {        'y+': date.getFullYear(),        'M+': date.getMonth() + 1,        'd+': date.getDate(),        'h+': date.getHours(),        'm+': date.getMinutes(),        's+': date.getSeconds()    };    for (var k in o) {        if (new RegExp('(' + k + ')').test(fmt)) {            var str = o[k] + '';            fmt = fmt.replace(RegExp.$1, (str.length === 1) ? ('0' + str) : str);        }    };    return fmt;}

5.版本号比较

function versionCompare(curV, reqV) {        var arr1 = curV.split('.');        var arr2 = reqV.split('.');        //将两个版本号拆成数字         var maxL = Math.max(arr1.length, arr2.length);        var pos = 0; //当前比较位        var diff = 0; //当前为位比较是否相等        //逐个比较如果当前位相等则继续比较下一位        while (pos < maxL) {            diff = parseInt(arr1[pos]||0) - parseInt(arr2[pos]||0);            if (diff != 0) break;            pos++;        }        if (diff >= 0) {            return true;        } else {            return false;        }    }