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Javascript date.setUTCHours()用法及代碼示例


date.setUTCHours()是JavaScript中的內置函數,用於根據使用Date()構造函數創建的通用時間將小時設置為日期對象。

用法:

DateObj.setUTCHours(hours_Value);

DateObj是使用Date()構造函數創建的有效Date對象,我們要在其中設置小時數。


參數:這裏的參數hours_Value是小時值,用於設置使用date()構造函數創建的日期對象。

返回值:它返回由setUTCHours()函數設置的新的即更新的小時。

以下示例程序旨在說明setUTCHours()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 hour 11 is being set in above Date 
// Object with the help of setUTCHours() function 
dateobj.setUTCHours(11); 
  
// new hour from above Date Object is 
// being extracted using getUTCHours() 
var B = dateobj.getUTCHours(); 
  
// Printing new hour 
document.write(B); 
</script>

輸出:

11

錯誤和異常

  • 示例1:如果在Date()構造函數中我們在創建Date對象時沒有給出小時,則setUTCHours()函數仍將能夠根據通用時間設置新小時,這是在創建的Date對象中作為其參數給出的。
    <script> 
    // Here hour has not been assigned according to 
    // universal time while creating Date object 
    var dateobj = new Date('October 13, 1996 GMT-3:00'); 
      
    // new hour 11 is being set in above Date 
    // Object with the help of setUTCHours() function 
    dateobj.setUTCHours(11); 
      
    // new hour from above Date Object is 
    // being extracted using getUTCHours() 
    var B = dateobj.getUTCHours(); 
      
    // Printing new hour 
    document.write(B); 
    </script>

    輸出:

    11
  • 示例2:如果在Date()構造函數中未提供任何參數作為參數,則setUTCHours()函數仍將能夠設置小時,但根據通用時間,月,年和日期仍為當前時間。
    <script> 
    // Here nothing has been assigned 
    // while creating Date object 
    var dateobj = new Date(); 
      
    // new hour 11 is being set in above Date 
    // Object with the help of setUTCHours() function 
    dateobj.setUTCHours(11); 
      
    // hour from above Date Object is 
    // being extracted using getUTCHours() 
    var B = dateobj.getUTCHours(); 
      
    // month from above Date Object is 
    // being extracted using getUTCMonth() 
    var C = dateobj.getUTCMonth(); 
      
    // date from above Date Object is 
    // being extracted using getUTCDate() 
    var D = dateobj.getUTCDate(); 
      
    // year from above Date Object is 
    // being extracted using getUTCFullYear() 
    var E = dateobj.getUTCFullYear(); 
      
    // Printing new Hour 
    document.write(B + "<br>"); 
      
    // Printing current month 
    document.write(C + "<br>"); 
      
    // Printing current date 
    document.write(D + "<br>"); 
      
    // Printing current year 
    document.write(E); 
    </script>

    輸出:

    11
    2
    30
    2018

    這裏11是新小時,2是當前月,即3月,30是當前日期,2018是當前年。

  • 示例3:如果將小時值設置為26作為setHours()函數的參數,則它將2設置為小時,因為小時範圍是從0到23的形式,因此26-24=2,這裏減去24是因為0到23是24。
    <script> 
    // Here nothing has been assigned 
    // while creating Date object 
    var dateobj = new Date('October 13, 1996 05:35:32'); 
      
    // new hour 26 is being set in above Date 
    // Object with the help of setUTCHours() function 
    dateobj.setUTCHours(26); 
      
    // hour from above Date Object is 
    // being extracted using getUTCHours() 
    var B = dateobj.getUTCHours(); 
      
    // month from above Date Object is 
    // being extracted using getUTCMonth() 
    var C = dateobj.getUTCMonth(); 
      
    // date from above Date Object is 
    // being extracted using getUTCDate() 
    var D = dateobj.getUTCDate(); 
      
    // year from above Date Object is 
    // being extracted using getUTCFullYear() 
    var E = dateobj.getUTCFullYear(); 
      
    // Printing new Hour 
    document.write(B + "<br>"); 
      
    // Printing month 
    document.write(C + "<br>"); 
      
    // Printing date 
    document.write(D + "<br>"); 
      
    // Printing year 
    document.write(E); 
    </script>

    輸出:

    2
    9
    14
    1996

支持的瀏覽器:JavaScript date.setUTCHours()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


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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.setUTCHours() function。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。