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D3.js | d3.utcFriday Function

  • Last Updated : 23 Jul, 2019
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The d3.utcFriday function in D3.js is used to return all the dates based on Friday in the given range of start and end date in Coordinated Universal Time (UTC).

Syntax:

d3.utcFriday.range( start, end, step );

Parameters: This function accept three parameters which are given below:

  • Start: This parameter holds the given start date.
  • end: This parameter holds the given end date.
  • step: It is the optional parameter and the value is used to skip the dates.

Return Value: This function returns all the dates based on friday.

Below programs illustrate the d3.utcFriday function in D3.js:



Example 1:




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

Output:

["2015-08-07T00:00:00.000Z", "2015-08-14T00:00:00.000Z", 
"2015-08-21T00:00:00.000Z", "2015-08-28T00:00:00.000Z"]

Example 2:




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

Output:

["2015-08-07T00:00:00.000Z", "2015-08-21T00:00:00.000Z"]

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

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