Javascript date.setUTCDate()用法及代碼示例

date.setUTCDate()是JavaScript中的內置函數，用於根據通用時間將一個月的日期設置為使用Date()構造函數創建的日期對象。

用法:

DateObj.setUTCDate(date_Value);

DateObj是使用Date()構造函數創建的有效Date對象，在該構造函數中，我們要根據通用時間設置一個月的日期。

參數：這裏的參數date_Value是要在使用Date()構造函數創建的日期對象中設置的日期值。

返回值：它返回由setUTCDate()函數設置的新的月更新日期，該月的日期是1到31之間的整數值。

以下示例程序旨在說明setITCDate()函數：

<script> 
// Here a date has been assigned according to universal 
// time while creating Date object 
var dateobj = new Date('October 13, 1996 05:35:32 GMT-3:00'); 
  
// new date 15 of the month is being set in above Date 
// Object with the help of setDate() function 
dateobj.setUTCDate(15); 
  
// new date of the month according to universal time from 
// above Date Object is being extracted using getDate() 
var B = dateobj.getUTCDate(); 
  
// Printing new date of the month 
document.write(B); 
</script>

輸出：

15

錯誤和異常

• 示例1:在這裏，我們知道月份的日期在1到31之間，但是如果我們嘗試將日期設置為33，則它將下個月的日期設置為2，因為33-31 = 2，並且此日期2成為下一個日期上個月的。

  <script> 
  // Here a date according to universal time has 
  // been assigned while creating Date object 
  var dateobj = new Date('October 13, 1996 05:35:32 GMT-3:00'); 
    
  // new date 33 of the month is being set in above Date 
  // Object with the help of setUTCDate() function 
  dateobj.setUTCDate(33); 
    
  // new date of the month from above Date Object is 
  // being extracted using getUTCDate() 
  var B = dateobj.getUTCDate(); 
    
  // new month from above Date Object is 
  // being extracted using getUTCMonth() 
  var C = dateobj.getUTCMonth(); 
    
  // Printing new date of the month 
  document.write(B + "<br>"); 
    
  // Printing new month 
  document.write(C); 
  </script>

  輸出：

  2
  10

  在上麵的輸出中，2是十一月的日期，而10是十一月的月份，因為月份名稱從0到11開始，即，一月為0，十二月為11。

• 示例2:如果在Date()構造函數中我們在創建日期對象時未提供月份的任何日期，則setUTCDate()函數仍將能夠設置新日期，該日期作為其在創建的日期對象中的參數給出。

  <script> 
  // Here date according to universal time has 
  // not been assigned while creating Date object 
  var dateobj = new Date('October, 1996 05:35:32 GMT-3:00'); 
    
  // new date 12 of the month is being set in above Date 
  // Object with the help of setUTCDate() function 
  dateobj.setUTCDate(12); 
    
  // new date of the month from above Date Object is 
  // being extracted using getUTCDate() 
  var B = dateobj.getUTCDate(); 
    
  // Printing new date of the month 
  document.write(B); 
  </script>

  輸出：

  12

• 示例3:如果Date()構造函數中未提供任何參數，則setDate()函數仍然可以設置日期，而月份仍為當前日期。

  <script> 
  // Here nothing has been assigned 
  // while creating Date object 
  var dateobj = new Date(); 
    
  // new date 13 of the month is being set in above Date 
  // Object with the help of setUTCDate() function 
  dateobj.setUTCDate(13); 
    
  // date of the month from above Date Object is 
  // being extracted using getUTCDate() 
  var B = dateobj.getUTCDate(); 
    
  // month from above Date Object is 
  // being extracted using getUTCMonth() 
  var C = dateobj.getUTCMonth(); 
    
  // Printing new date of the month 
  document.write(B + "<br>"); 
    
  // Printing new month 
  document.write(C); 
  </script>

  輸出：

  13
  3

• 示例4:如果將月份的新日期設置為零(0)，則新日期將設置為上個月的最後一天。

  <script> 
  // Here a date according to universal time 
  // has been assigned while creating Date object 
  var dateobj = new Date('October 13, 1996 05:35:32 GMT-3:00'); 
    
  // new date 0 of the month is being set in above Date 
  // Object with the help of setUTCDate() function 
  dateobj.setUTCDate(0); 
    
  // date of the month from above Date Object is 
  // being extracted using getUTCDate() 
  var B = dateobj.getUTCDate(); 
    
  // month from above Date Object is 
  // being extracted using getUTCMonth() 
  var C = dateobj.getUTCMonth(); 
    
  // Printing new date of the month 
  document.write(B + "<br>"); 
    
  // Printing new month 
  document.write(C); 
  </script>

  輸出：

  30
  8

支持的瀏覽器：JavaScript date.setUTCDate()函數支持的瀏覽器如下：

• 穀歌瀏覽器
• IE瀏覽器
• 火狐瀏覽器
• Opera
• 蘋果瀏覽器