列表项倒计时

//html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>列表项倒计时</title>
</head>
<body>
    <ul class="list"></ul>
    <script type="text/x-dot-template" id="activeList">
        {{ for (var i = 0; i < it.info.length; i++) { }}
            <li class="item">               
                <p class="title">{{=it.info[i].actTitle ? it.info[i].actTitle : ''}}</p>
                <div class="info clearfix">
                    {{ if (it.currentTime < it.info[i].startTime) { }}
                    <span class="state not_start">未开始</span>
                    <span class="time">{{=obj.formatStartTime(it.info[i].startTime)}}开始</span>
                    {{ } else if (it.currentTime > it.info[i].endTime) { }}
                    <span class="state over">已结束</span>
                    {{ } else { }}
                    <span class="state underway">进行中</span>
                    <span class="time count-down" data-currenttime="{{=it.currentTime}}" data-endtime="{{=it.info[i].endTime}}">{{=obj.formatSurplusTime(it.info[i].endTime-it.currentTime)}}</span>
                    {{ } }}
                </div>
            </li>
        {{ } }}
    </script>
    <script type="text/javascript" src="jquery-1.8.3.min.js"></script>
    <script type="text/javascript" src="doT.js"></script>   
</body>
</html>
//js
var obj = {
    page: 1,
    isScroll: false,
    isIOS: (/iphone|ipad|ipod|itouch/gi).test(navigator.userAgent),
    timer: null,
    timeArr: [],
    base: 0,
    timeStamp: 0,
    // 初始化
    init: function () {
        obj.list();
        window.onmousewheel = document.onmousewheel = obj.scrollLoad;       
    },
    // 列表
    list: function () {
        var res = {
            currentTime: 1519874437647, 
            result: 0, 
            isEnd: 1, 
            info: [
                {
                    actTitle:"新建活动1",
                    appUrl:"http://upcdn.mpres.51vv.com/image/bc06a7a3cfd40163f8f396c0fec5f294.png",
                    endTime:1519874445000,
                    pcUrl:"http://upcdn.mpres.51vv.com/image/bc06a7a3cfd40163f8f396c0fec5f294.png",
                    startTime:1517500800000
                },
                {
                    actTitle:"新建活动2",
                    appUrl:"http://upcdn.mpres.51vv.com/image/bc06a7a3cfd40163f8f396c0fec5f294.png",
                    endTime:1519874449000,
                    pcUrl:"http://upcdn.mpres.51vv.com/image/bc06a7a3cfd40163f8f396c0fec5f294.png",
                    startTime:1519747260000
                },
                {
                    actTitle:"新建活动3",
                    appUrl:"http://upcdn.mpres.51vv.com/image/bc06a7a3cfd40163f8f396c0fec5f294.png",
                    endTime:1519747200000,
                    pcUrl:"http://upcdn.mpres.51vv.com/image/bc06a7a3cfd40163f8f396c0fec5f294.png",
                    startTime:1517414400000
                },
                {
                    actTitle:"新建活动4",
                    appUrl:"http://upcdn.mpres.51vv.com/image/bc06a7a3cfd40163f8f396c0fec5f294.png",
                    endTime:1519874448000,
                    pcUrl:"http://upcdn.mpres.51vv.com/image/bc06a7a3cfd40163f8f396c0fec5f294.png",
                    startTime:1517414400000
                }
            ]
        };
        if (res.result != 0) return;
        if (res.info && res.info.length > 0) {
            obj.isScroll = true;
            var item = $('#activeList').html();
            obj.page == 1 ? $('.list').html(doT.template(item)(res)) : $('.list').append(doT.template(item)(res));
            for (var i = 0; i < res.info.length; i++) {
                if (res.info[i].startTime < res.currentTime && res.currentTime < res.info[i].endTime) {
                    obj.timeArr.push(res.info[i].endTime - res.currentTime);
                } 
            }
            
            obj.countDown();
            return;
        }
    },
    // 格式化时间
    formatSurplusTime: function (timeStamp) {
        var sec = Math.floor(timeStamp/1000);
        if (sec >= 0) {
            return '剩余' + Math.floor(sec/86400) + '天' + ' ' + Math.floor(sec%86400/3600) + '时: ' + Math.floor(sec%86400%3600/60) + '分: ' + sec%60 + '秒';
        } else {
            return '剩余0天 0时: 0分: 0秒';
        }
    },
    // 检验倒计时是否全部结束
    checkTimeStamp: function (timeStamp) {
        return timeStamp <= 1000;
    },
    // 倒计时
    countDown: function () {
        clearInterval(obj.timer);
        obj.timer = setInterval(function () {
            // console.log(obj.timeArr);
            if (obj.timeArr.every(obj.checkTimeStamp)) {
                clearInterval(obj.timer);
            } else {
                for (var i = 0; i < obj.timeArr.length; i++) {
                    obj.timeArr[i] = obj.timeArr[i] - 1000;
                    $('.count-down').eq(i).html(obj.formatSurplusTime(obj.timeArr[i]));
                }
            }
            // console.log(obj.timeArr);
        },1*1000);
    }
};
obj.init();
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