Javascript 日期差异
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Javascript DateDiff
提问by Frank G.
I am having a problem with the DateDiff function. I am trying to figure out the Difference between two dates/times. I have read this posting (What's the best way to calculate date difference in Javascript) and I also looked at this tutorial (http://www.javascriptkit.com/javatutors/datedifference.shtml) but I can't seem to get it.
我的 DateDiff 函数有问题。我想弄清楚两个日期/时间之间的差异。我已经阅读了这篇文章（在 Javascript 中计算日期差异的最佳方法是什么），我也看过这个教程（http://www.javascriptkit.com/javatutors/datedifference.shtml），但我似乎无法理解.
Here is what I tried to get to work with no success. Could someone please tell me what I am doing and how I can simplify this. Seems a little over coded...?
这是我试图开始工作但没有成功的方法。有人可以告诉我我在做什么以及如何简化它。似乎有点过度编码......？
//Set the two dates
var currentTime = new Date();
var month = currentTime.getMonth() + 1;
var day = currentTime.getDate();
var year = currentTime.getFullYear();
var currDate = month + "/" + day + "/" + year;
var iniremDate = "8/10/2012";
//Show the dates subtracted
document.write('DateDiff is: ' + currDate - iniremDate);
//Try this function...
function DateDiff(date1, date2) {
return date1.getTime() - date2.getTime();
}
//Print the results of DateDiff
document.write (DateDiff(iniremDate, currDate);
采纳答案by pimvdb
Your first try does addition first and then subtraction. You cannot subtract strings anyway, so that yields NaN.
您的第一次尝试是先加法，然后是减法。无论如何，您不能减去字符串，因此会产生NaN.
The second trry has no closing ). Apart from that, you're calling getTimeon strings. You'd need to use new Date(...).getTime(). Note that you get the result in milliseconds when subtracting dates. You could format that by taking out full days/hours/etc.
第二次尝试没有结束)。除此之外，您正在调用getTime字符串。你需要使用new Date(...).getTime(). 请注意，减去日期时，您会得到以毫秒为单位的结果。您可以通过取出整天/小时/等来格式化它。
回答by Frank G.
Okay for those who would like a working example here is a simple DateDiff ex that tells date diff by day in a negative value (date passed already) or positive (date is coming).
好的，对于那些想要一个工作示例的人来说，这里是一个简单的 DateDiff ex，它以负值（日期已经过去）或正值（日期即将到来）按天告诉日期差异。
EDIT: I updated this script so it will do the leg work for you and convert the results in to in this case a -10 which means the date has passed. Input your own dates for currDate and iniPastedDate and you should be good to go!!
编辑：我更新了这个脚本，所以它会为你做腿部工作，并将结果转换为 -10，这意味着日期已经过去。为 currDate 和 iniPastedDate 输入您自己的日期，您应该很高兴！
//Set the two dates
var currentTime = new Date()
var currDate = currentTime.getMonth() + 1 + "/" + currentTime.getDate() + "/" + currentTime.getFullYear() //Todays Date - implement your own date here.
var iniPastedDate = "8/7/2012" //PassedDate - Implement your own date here.
//currDate = 8/17/12 and iniPastedDate = 8/7/12
function DateDiff(date1, date2) {
var datediff = date1.getTime() - date2.getTime(); //store the getTime diff - or +
return (datediff / (24*60*60*1000)); //Convert values to -/+ days and return value
}
//Write out the returning value should be using this example equal -10 which means
//it has passed by ten days. If its positive the date is coming +10.
document.write (DateDiff(new Date(iniPastedDate),new Date(currDate))); //Print the results...
回答by AKHIL
function setDateWeek(setDay){
var d = new Date();
d.setDate(d.getDate() - setDay); // <-- add this
var curr_date = d.getDate();
var curr_month = d.getMonth() + 1;
var curr_year = d.getFullYear();
return curr_date + "-" + curr_month + "-" + curr_year;
}
setDateWeek(1);
回答by Neeraj Dhekale
No need to include JQuery or any other third party library.
无需包含 JQuery 或任何其他第三方库。
Specify your input date format in title tag.
在标题标签中指定您的输入日期格式。
HTML:
HTML：
< script type="text/javascript" src="http://services.iperfect.net/js/IP_generalLib.js">
Use javascript function:
使用javascript函数：
IP_dateDiff(strDate1,strDate2,strDateFormat,debug[true/false])
alert(IP_dateDiff('11-12-2014','12-12-2014','DD-MM-YYYY',false));
IP_dateDiff function will return number of days.
IP_dateDiff 函数将返回天数。
