JavaScript | RegExp s Metacharacter

JavaScript | RegExp \s Metacharacter

Last Updated : 22 Apr, 2019

The RegExp \s Metacharacter in JavaScript is used to find the whitespace characters. The whitespace character can be a space/tab/new line/vertical character. It is same as [ \t\n\r].

Syntax:

/\s/

new RegExp("\\s")

Syntax with modifiers:

/\s/g

new RegExp("\\s", "g")

Example 1: This example replaces the white spaces with dash.

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        JavaScript RegExp s Metacharacter 
    </title> 
</head> 
  
<body style="text-align:center"> 
      
    <h1 style="color:green"> 
        GeeksforGeeks 
    </h1> 
      
    <h2>RegExp \s Metacharacter</h2> 
      
    <p> 
        Input String: GeeksforGeeks is the computer 
        science\nportal\tfor geeks. 
    </p> 
      
    <button onclick="geek()"> 
        Click it! 
    </button> 
      
    <p id="app"></p> 
      
    <script> 
        function geek() { 
            var regex = /\s/g; 
            var replace = "-"; 
            var str = "GeeksforGeeks is the computer " 
                    + "science\nportal\tfor geeks."; 
            var str1 = str.replace(regex, replace); 
            alert("The new string is: \n" + str1); 
        } 
    </script> 
</body> 
  
</html>                     

Output:
Before Clicking the button:
backs
After Clicking the button:
backs

Example 2: This example replaces all the white spaces with hash(#).

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        JavaScript RegExp s Metacharacter 
    </title> 
</head> 
  
<body style="text-align:center"> 
      
    <h1 style="color:green"> 
        GeeksforGeeks 
    </h1> 
      
    <h2>RegExp \s Metacharacter</h2> 
      
    <p> 
        Input String: Geeks Classes is a Classroom 
        programme by GeeksforGeeks to enhance DSA. 
    </p> 
      
    <button onclick="geek()"> 
        Click it! 
    </button> 
      
    <p id="app"></p> 
      
    <script> 
        function geek() { 
            var regex = new RegExp("\\s", "g"); 
            var replace = "#"; 
            var str = "Geeks Classes is a Classroom " 
                    + "programme\nby GeeksforGeeks\tto" 
                    + " enhance DSA"; 
            var str1 = str.replace(regex, replace); 
            alert("The new string is: \n" + str1); 
        } 
    </script> 
</body> 
  
</html>                     