jQuery UI: Initialize the datepicker and calculate the week of the year

Last update on July 24 2025 12:56:10 (UTC/GMT +8 hours)

jQuery UI Fundamental - I : Exercise-25

Initialize the datepicker and calculate the week of the year. Use the default implementation ISO 8601.

Sample solution :

HTML Code :

<!DOCTYPE html>
<html>
<head>
<link href="https://code.jquery.com/ui/jquery-ui-git.css" rel="stylesheet" type="text/css" />
<script src="https://code.jquery.com/jquery-git.js"></script>
<script src="https://code.jquery.com/ui/jquery-ui-git.js"></script>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>Initialize the datepicker and calculate the week of the year.</title>
</head>
<body>
<p>Pick a Date : <input type="text" id="datepicker" /></p>  
</body>
</html>

JavaScript Code :

$( "#datepicker" ).datepicker({ 
     onSelect: function(dateText, inst) {
 console.log("Week of the year" , $.datepicker.iso8601Week(new Date(dateText)));
     } 
});

Go to:

PREV : Initialize the datepicker and show a button text.
NEXT : Initialize the datepicker and rendered the month as a dropdown instead of text.

See the Pen jquery-ui-fundamental-exercise-25 by w3resource (@w3resource) on CodePen.

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