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JavaScript | RegExp {X} Quantifier

  • Last Updated : 23 Apr, 2019

The RegExp m{X} Quantifier in JavaScript is used to find the match of any string that contains a sequence of m, X times where X is a number.

Syntax:

/m{X}/ 

or

new RegExp("m{X}")

Syntax with modifiers:

/\m{X}/g 

or



new RegExp("m{X}", "g")

Example 1: This example matches the presence of the word ‘ee’ in the whole string.




<!DOCTYPE html>
<html>
  
<head>
    <title>
        JavaScript RegExp {X} Quantifier
    </title>
</head>
  
<body style="text-align:center">
      
    <h1 style="color:green">GeeksforGeeks</h1>
      
    <h2>RegExp {X} Quantifier</h2>
      
    <p>Input String: GeeksforGeeks@_123_$</p>
      
    <button onclick="geek()">Click it!</button>
      
    <p id="app"></p>
      
    <script>
        function geek() {
            var str1 = "GeeksforGeeks@_123_$";
            var regex4 = /e{2}/gi;
            var match4 = str1.match(regex4);
  
            document.getElementById("app").innerHTML
                    = "Found " + match4.length
                    + " matches: " + match4;
        }
    </script>
</body>
  
</html>                    

Output:
Before Clicking the button:
xd
After Clicking the button:
xd

Example 2: This example replaces the word ‘ee’ with character ‘E’.




<!DOCTYPE html>
<html>
  
<head>
    <title>
        JavaScript RegExp {X} Quantifier
    </title>
</head>
  
<body style="text-align:center">
      
    <h1 style="color:green">GeeksforGeeks</h1>
      
    <h2>RegExp {X} Quantifier</h2>
      
    <p>String: ee@128GeeeeK</p>
      
    <button onclick="geek()">Click it!</button>
      
    <p id="app"></p>
      
    <script>
        function geek() {
            var str1 = "ee@128GeeeeK";
            var regex4 = new RegExp("e{2}", "gi");         
            var replace = "E";
            var match4 = str1.replace(regex4, replace);
            document.getElementById("app").innerHTML
                = " New string: " + match4;
        }
    </script>
</body>
  
</html>                    

Output:
Before Clicking the button:
xd
After Clicking the button:
xd

Supported Browsers: The browsers supported by RegExp {X} Quantifier are listed below:

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



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