Javascript date.setUTCMilliseconds()用法及代碼示例

date.setUTCMilliseconds()是JavaScript中的內置函數，用於根據通用時間將毫秒設置為使用Date()構造函數創建的日期對象。

用法:

DateObj.setUTCMilliseconds(milliseconds_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毫秒。毫秒值是從0到999。

參數：這裏的參數是milliseconds_Value是在Date()構造函數中設置的毫秒值。

返回值：它返回由setUTCMilliseconds()函數設置的新的即更新的毫秒。

以下示例程序旨在說明setUTCMilliseconds()函數：

<script> 
// Here a date has been assigned according to 
// universal time while creating Date object 
var dateobj = new Date('October 13, 1996 05:35:32:77 GMT-3:00'); 
  
// new millisecond of 52 is being set in above Date 
// Object with the help of setUTCMilliseconds() function 
dateobj.setUTCMilliseconds(52); 
  
// new millisecond from above Date Object is 
// being extracted using getUTCMilliseconds() 
var B = dateobj.getUTCMilliseconds(); 
  
// Printing new millisecond 
document.write(B); 
</script>

輸出：

52

錯誤和異常

• 示例1:如果在Date()構造函數中創建日期對象時不提供毫秒數，則setUTCMilliseconds()函數仍然可以設置新的毫秒數，該毫秒數作為在創建的Date對象中的參數給出。

  <script> 
  // Here millisecond has not been assigned according to 
  // universal time while creating Date object 
  var dateobj = new Date('October 13, 1996 GMT-3:00'); 
    
  // new millisecond of 51 is being set in above Date 
  // Object with the help of setUTCMilliseconds() function 
  dateobj.setUTCMilliseconds(51); 
    
  // new millisecond from above Date Object is 
  // being extracted using getUTCMilliseconds() 
  var B = dateobj.getUTCMilliseconds(); 
    
  // Printing new millisecond 
  document.write(B); 
  </script>

  輸出：

  51

• 示例2:如果在Date()構造函數中未提供任何參數作為參數，則setUTCMilliseconds()函數仍將能夠設置毫秒，但根據通用時間，月，年，日期等仍為當前時間。

  <script> 
  // Here nothing has been assigned according to 
  // universal time while creating Date object 
  var dateobj = new Date(); 
    
  // new millisecond of 42 is being set in above Date 
  // Object with the help of setUTCMilliseconds() function 
  dateobj.setUTCMilliseconds(42); 
    
  // milliseconds from above Date Object is 
  // being extracted using getUTCMilliseconds() 
  var B = dateobj.getUTCMilliseconds(); 
    
  // month from above Date Object is 
  // being extracted using getUTCMonth() 
  var C = dateobj.getUTCMonth(); 
    
  // date from above Date Object is 
  // being extracted using getDate() 
  var D = dateobj.getUTCDate(); 
    
  // year from above Date Object is 
  // being extracted using getUTCFullYear() 
  var E = dateobj.getUTCFullYear(); 
    
  // Printing new milliseconds 
  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：

  42
  3
  1
  2018

  根據通用時間，這裏42是新毫秒，3是當前月份，即4月，1是當前日期，2018是當前年份。

• 示例3:如果將毫秒值1006設置為setUTCMilliseconds()函數的參數，則會將6設置為毫秒，因為毫秒範圍是從0到999，因此，此處減去1000，因為0到999為1000。

  <script> 
  // Here date has been assigned according to 
  // universal time while creating Date object 
  var dateobj = new Date('October 13, 1996 05:35:32:45 GMT-3:00'); 
    
  // new millisecond of 1006 is being set in above Date 
  // Object with the help of setUTCMilliseconds() function 
  dateobj.setUTCMilliseconds(1006); 
    
  // milliseconds from above Date Object is 
  // being extracted using getUTCMilliseconds() 
  var B = dateobj.getUTCMilliseconds(); 
    
  // Second from above Date Object is 
  // being extracted using getUTCSeconds() 
  var C = dateobj.getUTCSeconds(); 
    
  // Printing new Milliseconds 
  document.write(B + "<br>"); 
    
  // Printing second 
  document.write(C); 
  </script>

  輸出：

  6
  33

支持的瀏覽器：JavaScript date.setUTCMilliseconds()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