如何检查同一天的两个时间戳？

给定两个时间戳，我们必须找出这些时间是否相同。在这里我们可以使用 JavaScript 日期对象。

例子：

Input: TimeStamp1 = 20-04-2020 , 16:04:55 and 
       TimeStamp2 = 20-04-2020 , 10:22:42 

Output: These dates are of same date

Input: TimeStamp1 = 20-04-2020 , 16:04:55 and 
       TimeStamp2 = 20-04-2019 , 10:22:42

Output: These timestamps are not on the same date.

• 说明：这些时间戳具有相同的日期，即 20-04-2020 在 JavaScript 对象中可以转换此日期。

var D1 = new Date(2020, 04, 20, 16, 04, 55)
var D2 = new Date(2020, 04, 20, 10, 22, 42)

方法1：首先检查两个日期的年、月和日。如果都相等，那么我们可以说这两个日期相等。你检查这篇文章JavaScript get Date Methods 。要获取年份，我们有getFullYear() 方法，对于月份，我们有getMonth() 方法，对于日期，我们有getDate() 方法。

• 例子：

Javascript

 
    // Function to check whether timestamp are on same day
    const TimeStampAreOnSameDay = (d1, d2) =>
        d1.getFullYear() === d2.getFullYear() &&
        d1.getMonth() === d2.getMonth() &&
        d1.getDate() === d2.getDate();
   
    // To set two dates to two variables
    var d1 = new Date(2020, 4, 20, 16, 4, 55);
    var d2 = new Date(2020, 4, 20, 10, 22, 42);
 
    var result = TimeStampAreOnSameDay(d1 , d2);
   
    //To display the final result
    if (result === true)
        document.write("Time Stamp " + d1 + " and "
                       + d2 + " is of same day.");
   else
    document.write("Time Stamp " + d1 + " and "
                       + d2 + " is of different day.");

输出：

Time Stamp Wed May 20 2020 16:04:55 GMT+0530 (India Standard Time) and
Wed May 20 2020 10:22:42 GMT+0530 (India Standard Time) is of same day.

方法 2：您必须通过setHours() 方法将小时、分钟和秒都设置为 0 ，然后比较两者。

• 例子：

Javascript

 
    // Function to check whether timestamp are on same day
    const TimeStampAreOnSameDay = (d1, d2) =>
        d1.setHours(0,0,0,0) === d2.setHours(0,0,0,0);
     
    // To set two dates to two variables
    var d1 = new Date(2020, 4, 20, 16, 4, 55);
    var d2 = new Date(2020, 4, 21, 10, 22, 42);
 
    var result = TimeStampAreOnSameDay(d1 , d2);
     
    //To display the final result
    if (result === true)
    document.write("Time Stamp " + d1 + " and "
                    + d2 + " is of same day.");
    else
    document.write("Time Stamp " + d1 + " and "
                    + d2 + " is of different day.");
     

输出：

Time Stamp Wed May 20 2020 00:00:00 GMT+0530 (India Standard Time) and
Thu May 21 2020 00:00:00 GMT+0530 (India Standard Time) is of different day.