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D3.js | d3.timeHour Function

  • Last Updated : 25 Jul, 2019

The d3.timeHour function in D3.js is used to return all the hours with date in the given range of start and end time.

Syntax:

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

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

  • Start: This parameter holds the given start time.
  • end: This parameter holds the given end time.
  • step: This is the optional value used to skip hours.

Return Value: This function returns all the possible hours in the given range.



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

Example 1:




<!DOCTYPE html>
<html>
   <head>
      <title>
          D3.js | d3.timeHour Function 
      </title>
      <script src =
          "https://d3js.org/d3.v4.min.js">
      </script>
   </head>
   
   <body>
         
      <script>
         
         // Initialising start and end time
         var start = new Date(2015, 07, 01, 4, 20);
         var end = new Date(2015, 07, 01, 8, 20);
           
         // Calling the timeHour function
         // without step value
         var a = d3.timeHour.range(start, end);
           
         // Getting the hours values
         console.log(a);
      </script>
   </body>
</html>

Output:

["2015-07-31T23:30:00.000Z", "2015-08-01T00:30:00.000Z",
 "2015-08-01T01:30:00.000Z", "2015-08-01T02:30:00.000Z"]

Example 2:




<!DOCTYPE html>
<html>
   <head>
      <title>
          D3.js | d3.timeHour Function 
      </title>
      <script src =
          "https://d3js.org/d3.v4.min.js">
      </script>
   </head>
   
   <body>
         
      <script>
         
         // Initialising start and end time
         var start = new Date(2015, 07, 01, 1, 20);
         var end = new Date(2015, 07, 01, 6, 20);
           
         // Calling the timeHour function
         // with step value
         var a = d3.timeHour.range(start, end, 2);
           
         // Getting the hour values
         console.log(a);
      </script>
   </body>
</html>

Output:

["2015-07-31T20:30:00.000Z", "2015-07-31T22:30:00.000Z", "2015-08-01T00:30:00.000Z"]

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




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