How to extract date from a string in dd-mmm-yyyy format in JavaScript ?

In this article, we will see how to extract date from a given string of format “dd-mmm-yyyy” in JavaScript. We have a string, and we want to extract the date format “dd-mmm-yyyy” from the string.

Example:

// String
str = "India got freedom on 15-Aug-1947"

// Extracted date from given string in 
// "dd-mmm-yyyy" format
date = 15-Aug-1947

Approach:

There is no native format in JavaScript for” dd-mmm-yyyy”. To get the date format “dd-mmm-yyyy”, we are going to use regular expression in JavaScript.
The regular expression in JavaScript is used to find the pattern in a string. So we are going to find the “dd-mmm-yyyy” pattern in the string using the match() method.

Syntax:

str.match(/\d{2}-(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)-\d{4}/gi);

Example: This example shows the use of the above-explained approach.

HTML

<!DOCTYPE html>
<html lang="en">
 
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible"
          content="ie=edge">
</head>
 
<body>
    <!-- div element -->
    <div style="color: red;
                background-color: black;
                margin: 40px 40px;
                padding: 20px 100px;">
        India got freedom on 15-Aug-1947.
        <p></p>
        <button>
            Click the button to see date
        </button>
    </div>
    <!-- Link of JQuery cdn -->
    <script src=
"https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js">
    </script>
</body>
 
</html>

Javascript

// After clicking the button it will
// show the height of the div
$("button").click(function () {
 
    // String that contains date
    var str = "India got freedom on 15-Aug-1947"
 
    // Find "dd-mmm-yyyy" format in the string
    var result =
        str.match(/\d{2}-(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)-\d{4}/gi);
 
    // Show date on screen in
    // format "dd-mmm-yyyy"
    $("p").html(result);
});