d3.js d3.timeWednesdays()用法及代码示例

D3.js中的d3.timeWednesdays()函数用于返回给定开始日期和结束日期范围内基于星期三的所有日期。

用法:

d3.timeWednesdays(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:这是用于跳过日期的可选值。

返回值：此函数返回基于星期三的所有日期。

以下程序说明了D3.js中的d3.timeWednesdays()函数：

范例1：

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

输出：

["2015-08-04T18:30:00.000Z", "2015-08-11T18:30:00.000Z", 
 "2015-08-18T18:30:00.000Z", "2015-08-25T18:30:00.000Z"]

范例2：

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

输出：

["2015-08-04T18:30:00.000Z", "2015-08-18T18:30:00.000Z"]

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

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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.timeWednesdays() 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。