How to find date difference in javascript

How to find the date difference in javascript: 1. Create an HTML sample file; 2. Convert the two dates into timestamps; 3. Then divide by the number of milliseconds in each day to get the number of days apart.

The operating environment of this article: windows7 system, javascript version 1.8.5, DELL G3 computer

How to find the date difference with javascript?

How to find the date difference in javascript

The details are as follows:

<script type="text/javascript">
function daytonow(year, month, date){
 //思路就是转换两个日期为时间戳即毫秒数，再除以每一天的毫秒数得出相隔多少天
 //JS中的month是从0开始，所以month要减一
 month--;
 //过去的日子
 var tdate = new Date(year, month, date).getTime();
 //今天
 var tnow = new Date().getTime();
 var longdate = Math.ceil((tnow - tdate) / (1000 * 60 * 60 * 24));
 return longdate;
}
alert(daytonow(2009, 4, 5));
</script>

The difference in days between two dates:

//两日期串的天数之差, 前-后, sDate1-sDate2
function DateDiff(sDate1, sDate2) { //sDate1和sDate2是"2002-12-18"格式
  var aDate, oDate1, oDate2, iDays;
  aDate = sDate1.split("-");
  oDate1 = new Date(aDate[0], aDate[1] - 1, aDate[2]);
  aDate = sDate2.split("-");
  oDate2 = new Date(aDate[0], aDate[1] - 1, aDate[2]);
  iDays = parseInt(Math.abs(oDate1 - oDate2) / 1000 / 60 / 60 / 24);
  if ((oDate1 - oDate2) < 0) {
    return -iDays;
  }
  return iDays;
}
//两日期串的天数之差, 前-后, sDate1-sDate2
function DateDiff2(sDate1, sDate2) { //sDate1和sDate2是"12/18/2011"格式
  var oDate1, oDate2, iDays;
  oDate1 = new Date(sDate1);
  oDate2 = new Date(sDate2);
  var iDays = parseInt(Math.abs(oDate1 - oDate2) / 1000 / 60 / 60 / 24);
  if ((oDate1 - oDate2) < 0){
    return -iDays;
  }
  return iDays;
}

Recommended study: "javascript basic tutorial"

The above is the detailed content of How to find date difference in javascript. For more information, please follow other related articles on the PHP Chinese website!