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JavaScript Date setUTCMonth()用法及代碼示例


下麵是Date setSeconds()方法的示例。

  • 例:
    <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 month of January is being set in above Date 
      // Object with the help of setUTCMonth() method 
      dateobj.setUTCMonth(0); 
      
      // New month from above Date Object is 
      // being extracted using getUTCMonth() 
      var B = dateobj.getMonth(); 
      
      // Printing new month 
      document.write(B); 
                             
    </script>                        
  • 輸出:
    0

date.setUTCMonth()方法用於根據通用時間將月份設置為使用date()構造函數創建的日期對象。句法:

dateObj.setUTCMonth(month_Value);

參數:該方法接受上述和以下描述的單個參數:

  • month_Value此參數保存用於在date()構造函數中設置的month的值。

返回值:它返回由setUTCMonth()方法設置的新的即更新的月份。

注意:dateObj是使用Date()構造函數創建的有效Date對象,我們要在其中構造月份。



上述方法的更多代碼如下:

程序1:如果在Date()構造函數中沒有給出任何月份,則setUTCMonth()方法仍然設置新的月份作為其參數。

<script> 
  // Here month has not been assigned according to 
  // universal time while creating Date object 
  var dateobj = new Date('1996, 05:35:32 GMT-3:00'); 
  
  // New month of 2 is being set in above Date 
  // Object with the help of setUTCMonth() method 
  dateobj.setUTCMonth(2); 
  
  // New month from above Date Object is 
  // being extracted using getUTCMonth() 
  var B = dateobj.getUTCMonth(); 
  
  // Printing new month 
  document.write(B); 
</script>

輸出:

2

程序2:如果在Date()構造函數中未提供任何參數作為參數,則仍將setUTCMonth()方法設置為月,但年,日期等根據通用時間變為當前的。
根據通用時間,此處11是12月的新月,1是當前日期,而2018是當前年份。

<script> 
  // Here nothing has been assigned according to 
  // universal time while creating Date object 
  var dateobj = new Date(); 
  
  // New month of 11 is being set in above Date 
  // Object with the help of setUTCMonth() method 
  dateobj.setUTCMonth(11); 
  
  // Month from above Date Object is 
  // being extracted using getUTCMonth() 
  var B = dateobj.getUTCMonth(); 
  
  // Date from above Date Object is 
  // being extracted using getUTCDate() 
  var C = dateobj.getUTCDate(); 
  
  // Year from above Date Object is 
  // being extracted using getUTCFullYear() 
  var D = dateobj.getUTCFullYear(); 
  
  // Printing new month 
  document.write(B + '<br />'); 
  
  // Printing current date 
  document.write(C + '<br />'); 
  
  // Printing current year 
  document.write(D + '<br />'); 
                          
</script>                        

輸出:

11
1
2018

程序3:如果將setUTCMonth()方法的參數指定為month 15,則將3設置為month,因為month範圍是0到11,因此15-12=3,這裏減去12是因為0到11為12。
這裏3是4月的新月,因為月份範圍是0到11,即總計12,所以年份從1996年變為1997,我們將新月份設置為3,從1996年起將年份增加1到1997,月份變成3到世界時間。

<script> 
  // Here 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 month of 15 is being set in above Date 
  // Object with the help of setUTCMonth() method 
  dateobj.setUTCMonth(15); 
  
  // Month from above Date Object is 
  // being extracted using getUTCMonth() 
  var B = dateobj.getUTCMonth(); 
  
  // Year from above Date Object is 
  // being extracted using getUTCFullYear() 
  var C = dateobj.getUTCFullYear(); 
  
  // Printing new month 
  document.write(B + '<br />'); 
  
  // Printing new year 
  document.write(C); 
                         
</script>                        

輸出:

3
1997

支持的瀏覽器:下麵列出了JavaScript Date setUTCMonth()方法支持的瀏覽器:

  • 穀歌瀏覽器
  • IE瀏覽器
  • 火狐瀏覽器
  • Opera
  • Safari




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注:本文由純淨天空篩選整理自Kanchan_Ray大神的英文原創作品 JavaScript Date setUTCMonth() Method。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。