D3.js | d3.utcMondays() Function

Last Updated : 23 Jul, 2019

The d3.utcMondays() function in D3.js is used to return all the dates based on Monday in the given range of start and end date in Coordinated Universal Time (UTC).

Syntax:

d3.utcMondays( 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 used to skip dates.

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

Below programs illustrate the d3.utcMondays() function in D3.js:

Example 1:

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

Output:

["2015-08-03T00:00:00.000Z", "2015-08-10T00:00:00.000Z",
"2015-08-17T00:00:00.000Z", "2015-08-24T00:00:00.000Z"]

Example 2:

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

Output:

["2015-08-03T00:00:00.000Z", "2015-08-17T00:00:00.000Z"]

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

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