JavaScript | RegExp (x|y) Expression

Last Updated : 22 Apr, 2019

The RegExp (x|y) Expression in JavaScript is used to search any of the specified characters (separated by |).

Syntax:

/(x|y)/

new RegExp("(x|y)")

Syntax with modifiers:

/(x|y)/g

new RegExp("(x|y)", "g")

Example 1: This example searches the word “GEEKS” or “portal” in the whole string.

<!DOCTYPE html>
<html>
  
<head>
    <title>
        JavaScript RegExp (x|y) Expression
    </title>    
</head>
  
<body style="text-align:center">
      
    <h1 style="color:green">
        GeeksforGeeks
    </h1>
      
    <h2>RegExp (x|y) Expression</h2>
      
    <p>
        GEEKSFORGEEKS is the computer science
        portal for geeks.
    </p>
      
    <button onclick="geek()">
        Click it!
    </button>
      
    <p id="app"></p>
      
    <script>
        function geek() {
           var str1 = "GEEKSFORGEEKS is the computer "
                    + "science portal for geeks.";
                      
            var regex4 = /(GEEKS|portal)/g;
            var match4 = str1.match(regex4);
   
            document.getElementById("app").innerHTML = 
                    "Found " + match4.length
                    + " matches: " +  match4;
        }
    </script>
</body>
  
</html>

Output:

Before Clicking the button:
After Clicking the button:

Example 2: This example searches the digit numbered 0 or 5 in the whole string.

<!DOCTYPE html>
<html>
  
<head>
    <title>
        JavaScript RegExp (x|y) Expression
    </title>    
</head>
  
<body style="text-align:center">
      
    <h1 style="color:green">
        GeeksforGeeks
    </h1>
      
    <h2>RegExp (x|y) Expression</h2>
      
    <p>Input String: 012034567895.</p>
      
    <button onclick="geek()">
        Click it!
    </button>
      
    <p id="app"></p>
      
    <script>
        function geek() {
           var str1 = "012034567895";
            var regex4 = /(0|5)/g;
            var match4 = str1.match(regex4);
   
            document.getElementById("app").innerHTML = 
                        "Found " + match4.length
                        + " matches: " +  match4;
        }
    </script>
</body>
  
</html>