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d3.js d3.timeFriday用法及代碼示例


D3.js中的d3.timeFriday函數用於返回給定開始和結束日期範圍內所有基於星期五的日期。

用法:

d3.timeFriday.range( 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,其中包含用於跳過日期的值。

返回值:此函數返回基於星期五的所有日期。

以下程序說明了D3.js中的d3.timeFriday函數:

示例1:

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        D3.js | d3.timeFriday 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, 07, 01); 
        var end = new Date(2015, 07, 30); 
          
        // Calling the timeFriday function 
        // without step value 
        var a = d3.timeFriday.range(start, end); 
          
        // Getting the friday dates 
        console.log(a); 
    </script> 
</body> 
  
</html>

輸出:

["2015-08-06T18:30:00.000Z", "2015-08-13T18:30:00.000Z", 
"2015-08-20T18:30:00.000Z", "2015-08-27T18:30:00.000Z"]

示例2:

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        D3.js | d3.timeFriday 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, 07, 01); 
        var end = new Date(2015, 07, 30); 
          
        // Calling the timeFriday function 
        // with step value 
        var a = d3.timeFriday.range(start, end, 2); 
          
        // Getting the friday dates 
        console.log(a); 
    </script> 
</body> 
  
</html>

輸出:

["2015-08-06T18:30:00.000Z", "2015-08-20T18:30:00.000Z"]

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



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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.timeFriday 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。