如何查看2個日期字段並比較查看哪個日期在前面，後面或相同

Question

我正在處理2個日期，這些日期在文本框中以這種格式作爲字符串發佈給我03/02/2010。一個是當前完成日期，第二個是最終完成日期。我需要比較這兩個日期，以檢查最終完成日期是否在當前完成日期的前面，後面或相同。

有沒有一種方法可以使用JavaScript或jQuery來做到這一點？

感謝您的任何幫助。

Answer 1

var passedDate1 = new Date('03/02/2010'); 
var passedDate2 = new Date('03/01/2010'); 

if (passedDate1 > passedDate2) { 
    alert ('Date1 is greated than date 2'); 
} 
else if (passedDate1 < passedDate2) { 
    alert ('Date1 is less than date 2'); 
} 
else { 
    alert ('they are equal'); 
} 

Answer 2

將其轉換爲美國格式

function dateUS(date) 
{ 
    var date = date.split("/"); 
    return date[2] + '/' + date[1] + '/' + date[0]; 
} 

然後

if(dateUS(dateCurrent) < dateUS(dateFinal)) 
{ 
    //your code 
} 

Answer 3

var doc = document, 
dateBox1 = doc.getElementById("date1").value, 
dateBox2 = doc.getElementById("date2").value, 
d1, d2, diff; 

//if there is no value, Date() would return today 
if (dateBox1) { 
    d1 = new Date(dateBox1); 
} else { 
    //however you want to handle missing date1 
} 
if (dateBox1) { 
    d2 = new Date(dateBox2); 
} else { 
    //however you want to handle missing date2 
} 
if (d1 && d2) { 
    //reduce the difference to days in absolute value 
    diff = Math.floor(Math.abs((d1 - d2) /1000/60/60/24)); 
} else { 
    //handle not having both dates 
} 
if (diff === 0) { 
    //d1 and d2 are the same day 
} 
if (diff && d1 > d2) { 
    //d1 is diff days after d2 and the diff is not zero 
} 
if (diff && d1 < d2) { 
    //d1 is diff days before d2 and the diff is not zero 
}