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d3.js d3.timeWeeks()用法及代碼示例


D3.js中的d3.timeWeeks()函數用於返回日期和時間在給定開始日期和結束日期範圍內的所有星期。

用法:

d3.timeWeeks( start, end, step );

參數:該函數接受以下三個參數:


  • Start:此參數保存給定的開始日期。
  • end:此參數保存給定的結束日期。
  • step:它是可選參數,其中包含用於跳過星期的值。

返回值:此函數返回給定範圍內的所有可能的星期。

以下程序說明了D3.js中的d3.timeWeeks()函數:

示例1:

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        D3.js | d3.timeWeeks() Function 
    </title> 
      
    <script src =  
        "https://d3js.org/d3.v4.min.js"> 
    </script> 
</head> 
  
<body> 
    <script> 
          
        // Initialising start and end date 
        var start = new Date(2015, 01, 01); 
        var end = new Date(2015, 02, 01); 
          
        // Calling the timeWeeks() function 
        // without step value 
        var a = d3.timeWeeks(start, end); 
          
        // Getting the week values 
        console.log(a); 
    </script> 
      
</html>    

輸出:

["2015-01-31T18:30:00.000Z", "2015-02-07T18:30:00.000Z", 
"2015-02-14T18:30:00.000Z", "2015-02-21T18:30:00.000Z"]

示例2:

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        D3.js | d3.timeWeeks() Function 
    </title> 
      
    <script src =  
        "https://d3js.org/d3.v4.min.js"> 
    </script> 
</head> 
  
<body> 
    <script> 
          
        // Initialising start and end date 
        var start = new Date(2015, 01, 01); 
        var end = new Date(2015, 02, 01); 
            
        // Calling the timeWeeks() function 
        // with step value 
        var a = d3.timeWeeks(start, end, 2); 
            
        // Getting the week values 
        console.log(a); 
    </script> 
      
</html>    

輸出:

["2015-01-31T18:30:00.000Z", "2015-02-14T18:30:00.000Z"]

參考: https://devdocs.io/d3~5/d3-time#timeWeeks



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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 D3.js | d3.timeWeeks() 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。