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JavaScript | RegExp $ Quantifier

  • Last Updated : 23 Apr, 2019

The RegExp m$ Quantifier in JavaScript is used to find the match of any string which contains m at the end of it.

Syntax:

/m$/ 

or

new RegExp("m$")

Syntax with modifiers:

/\m$/g 

or

new RegExp("m$", "g")

Example 1: This example matches the presence of the word ‘123’ at the end of the string.




<!DOCTYPE html>
<html>
  
<head>
    <title>
        JavaScript RegExp $ Quantifier
    </title>
</head>
  
<body style="text-align:center">
      
    <h1 style="color:green">GeeksforGeeks</h1>
      
    <h2>RegExp $ Quantifier</h2>
      
    <p>Input String: Geeksfor123\nGeeks@_123</p>
      
    <button onclick="geek()">Click it!</button>
      
    <p id="app"></p>
      
    <script>
        function geek() {
           var str1 = "Geeksfor123\nGeeks@_123";
            var regex4 = /123$/gim;
            var match4 = str1.match(regex4);
   
            document.getElementById("app").innerHTML
                    = "Found " + match4.length
                    + " matches: " +  match4;
        }
    </script>
</body>
  
</html>

Output:
Before Clicking the button:
dollar
After Clicking the button:
dollar

Example 2: This example replaces the word ‘K’ with ‘@’.




<!DOCTYPE html>
<html>
  
<head>
    <title>
        JavaScript RegExp $ Quantifier
    </title>
</head>
  
<body style="text-align:center">
      
    <h1 style="color:green">GeeksforGeeks</h1>
      
    <h2>RegExp $ Quantifier</h2>
      
    <p>String: @128GeeeeK</p>
      
    <button onclick="geek()">Click it!</button>
      
    <p id="app"></p>
      
    <script>
        function geek() {
            var str1 = "@128GeeeeK";
            var regex4 = new RegExp("K$", "gi");         
            var replace = "@";
            var match4 = str1.replace(regex4, replace);
            document.getElementById("app").innerHTML = 
                " New string: " + match4;
        }
    </script>
</body>
  
</html>                    

Output:
Before Clicking the button:
dollar
After Clicking the button:
dollar

Supported Browsers: The browsers supported by RegExp $ Quantifier are listed below:

  • Google Chrome
  • Apple Safari
  • Mozilla Firefox
  • Opera
  • Internet Explorer

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