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d3.js d3.timeThursdays()用法及代码示例


D3.js中的d3.timeThursdays()函数用于返回给定开始和结束日期范围内基于星期四的所有日期。

用法:

d3.timeThursdays( start, end, step );

参数:该函数接受以下三个参数:


  • Start:此参数保存给定的开始日期。
  • end:此参数保存给定的结束日期。
  • step:它是可选参数,其中包含用于跳过日期的值。

返回值:此函数返回基于星期四的所有日期。

以下程序说明了D3.js中的d3.timeThursdays()函数:

示例1:

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        D3.js | d3.timeThursdays() 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 timeThursdays() function 
        // without step value 
        var a = d3.timeThursdays(start, end); 
          
        // Getting the Thursday dates 
        console.log(a); 
    </script> 
</body> 
  
</html>                    

输出:

["2015-08-05T18:30:00.000Z", "2015-08-12T18:30:00.000Z", 
"2015-08-19T18:30:00.000Z", "2015-08-26T18:30:00.000Z"]

示例2:

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        D3.js | d3.timeThursdays() 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 timeThursdays() function 
         // with step value 
         var a = d3.timeThursdays(start, end, 2); 
            
         // Getting the Thursday dates 
         console.log(a); 
    </script> 
</body> 
  
</html>                    

输出:

["2015-08-05T18:30:00.000Z", "2015-08-19T18:30:00.000Z"]

参考: https://devdocs.io/d3~5/d3-time#timeThursdays



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注:本文由纯净天空筛选整理自Kanchan_Ray大神的英文原创作品 D3.js | d3.timeThursdays() Function。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。