js判断两个输入日期为同一周的

[yulei518]

请哪位高手，用JavaScript写一个输入两个日期，判断为同一周的。
不是为同一周的验证，谢谢！

[阿杰心路历程]

<script language="javascript">
	function check(old,now){
		var oneDayTime = 1000*60*60*24;
		var old_count =parseInt(old.getTime()/oneDayTime);
		var now_other =parseInt(now.getTime()/oneDayTime);
		return parseInt((old_count+4)/7) == parseInt((now_other+4)/7);
	}
	//var date = new Date(Date.parse('9/20/2010'));
	var date = new Date();
	var a = Date.parse('9/19/2010');
    	var now = new Date(a);
	alert(check(date,now));
</script>

昨晚睡觉的时候又想到的一个简单的算法，原理就是先计算出 现在距离1970年1月1日的总天数
因为1970年1月1 是周4 所以（天数+7）/7 取整 就是周数 如果相同就是同一周反之就不是

[阿杰心路历程]

上面说错了 是（总天数+4）/7

[阿杰心路历程]

<script language="javascript">

	
	function check(old,now){
		var now_time = now.getTime();
		var old_time = old.getTime();
		var now_day = now.getDay()==0?7:now.getDay();
		var old_day = old.getDay()==0?7:old.getDay();
	
		if(now_time >= old_time+7*60*60*24*1000 || old_time >=now_time+7*60*60*24*1000){
			alert('不属于本星期内的');
			return false;
		}else if(old.getDate() == now.getDate() ||old.getDate()>now.getDate&&old_day>new_day||old.getDate()

<now.getDate&&old_day < new_day ){
			alert('符合楼主要求！');
			return true;
		}
		alert('不属于本星期内的，属于7天内的！');
		return false;

	}	
	var a = Date.parse('9/19/2010');
	var date = new Date(a);
	var now = new Date();
	check(date,now);
</script>

[MrSLin]

function getWeekDay(year,month,day)
{
	var baseDay=new Date(2010,9,19);
	var day=new Date(year,month,day);
	return Math.ceil((day.getTime()-baseDay.getTime())/(7*24*3600*1000));
}

getWeekDay(2010,9,19)==getWeekDay(2010,9,12)?alert('in the same week'):alert('not in the same week');
getWeekDay(2010,9,16)==getWeekDay(2010,9,21)?alert('in the same week'):alert('not in the same week');
getWeekDay(2010,12,30)==getWeekDay(2011,1,1)?alert('in the same week'):alert('not in the same week');

[_loehuang_]

<script type="text/javascript">


function exports(startime,endTime){
			var longStartTime = simpleDateFormat_Parse(startime);
			var longEndTime = simpleDateFormat_Parse(endTime);

			var interval = longEndTime - longStartTime;

			if(interval > 7*24*3600*1000){
				alert("间隔时间大于一周");
				}else{
				alert("间隔时间小于一周");	
				}
}

/**
 * 解析 日期 将 格式为 yyyy-MM-dd HH:mm:ss 转成 long类型的数值
 */
function simpleDateFormat_Parse(dateString) {
	var dateArray = dateString.split("-");
	var sYear = dateArray[0];
	var sMonth = dateArray[1];
	var dateArray2 = dateArray[2].split(" ");
	var sDay = dateArray2[0];
	var dateArray3 = dateArray2[1].split(":");
	var sHour = dateArray3[0];
	var sMinute = dateArray3[1];
	var sSecond = dateArray3[2];

	return new Date(sYear, sMonth - 1, sDay, sHour, sMinute,sSecond).getTime();
}
var date1 = "2010-9-19 19:30:30";

var date2 = "2010-9-20 19:30:30";

exports(date1,date2);

</script>

思路就是这样！

[晚安蕾欧娜.]

        val = ['2021-07-26', '2021-07-30']
        const olddate = new Date(val[0]).getDay() === 0 ? 7 : new Date(val[0]).getDay()
        const newdate = new Date(val[1]).getDay() === 0 ? 7 : new Date(val[1]).getDay()
        const interval = newdate - olddate
        console.log('时间1', val[0])
        console.log('时间2', val[1])
        console.log('时间1->是周几', olddate)
        console.log('时间2->是周几', newdate)
        console.log('周->间隔', interval)
        console.log('日期间隔', window.dayjs(val[1]).diff(window.dayjs(val[0]), 'day'))
        if (interval === window.dayjs(val[1]).diff(window.dayjs(val[0]), 'day')) {
          console.log('同一周')
        } else {
          console.error('不是同一周')
          }

需要引用Day.js
连接：链接标题