[JS原生]自己写的一个电商活动定时器

 var activity = [2,6,10,14,18,22]; ???var today = new Date(); ???var nowHour = today.getHours(); ???var deadline,active_activity; ???for(let i = 0; i<activity.length;i++){ ?????if(nowHour>=22||nowHour<2){ ???????deadline=2; ???????active_activity=22; ?????} else { ???????if(nowHour>=activity[i]&&nowHour<activity[i+1]){ ?????????deadline=activity[i+1]; ?????????active_activity = activity[i]; ???????} ??????} ???} //判断当前是哪一个倒计时活动 ???var now,deadlineTime; ???var Hour,Minute,Second; ???????setInterval(function(){ ?????if(Hour===0&&Minute===0&&Second===1){ ???????deadline=deadline+4; ???????if(active_activity<22){ ?????????active_activity=active_activity+4; ???????} else{ ?????????active_activity=2; ???????} ?????} ?????var today = new Date(); ?????now = today.getTime(); ?????var time = new Date(today.getFullYear()+‘/‘+(today.getMonth()+1)+‘/‘+today.getDate()+‘ ‘+deadline+‘:00:00‘).getTime(); ?????if(nowHour<22){ ???????deadlineTime = time; ?????} else{ ???????deadlineTime = time + 24*60*60*1000; ?????} ?????var period = (deadlineTime - now)/1000; ????????Hour = parseInt(period/3600,10)>0?parseInt(period/3600,10):0; ?????Minute = parseInt((period-3600*Hour)/60, 10)>0?parseInt((period-3600*Hour)/60, 10):0; ?????Second = parseInt(period-3600*Hour-60*Minute,10)>0?parseInt(period-3600*Hour-60*Minute,10):0; ???$(".count-down-hour").html(Hour); ???$(".count-down-minute").html(Minute); ???$(".count-down-second").html(Second); ???},1000); //根据当前活动计算倒计时 ???var active_activity_word; ???if(active_activity>6){ ?????active_activity_word=active_activity; ???} else{ ?????active_activity_word=‘0‘+active_activity; ???} ???$(".flash-sale-activity").html(active_activity_word); ??});}