JavaScript | RegExp toString() Method

Last Updated : 25 Apr, 2019

The RegExp toString() Method in JavaScript is used to return the string value of the regular expression.

Syntax:

RegExpObject.toString()

Example 1: This example returns the string value of the regular expression.

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        JavaScript RegExp toString Method 
    </title> 
</head> 
  
<body style="text-align:center"> 
      
    <h1 style="color:green">GeeksforGeeks</h1> 
      
    <h2>RegExp toString() Method</h2> 
      
    <p>Input: RegExp([a-c]", "gi")</p> 
      
    <button onclick="geek()">Click it!</button> 
      
    <p id="app"></p> 
      
    <script> 
        function geek() { 
            var regex = new RegExp("[a-c]", "gi"); 
            var rex = regex.toString(); 
            document.getElementById("app").innerHTML =  
            "String Value: " + "<b>" + rex + "</b>"; 
        } 
    </script> 
</body> 
  
</html>                     

Output:
Before clicking the button:
tostring
After clicking the button:

Example 2: This example returns the string value of the regular expression.

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        JavaScript RegExp toString Method 
    </title> 
</head> 
  
<body style="text-align:center"> 
      
    <h1 style="color:green">GeeksforGeeks</h1> 
      
    <h2>RegExp toString() Method</h2> 
      
    <p>Regular Expression: /[a-k]/g</p> 
      
    <button onclick="geek()">Click it!</button> 
      
    <p id="app"></p> 
      
    <script> 
        function geek() { 
            var regex = /[a-k]/g; 
            var rex = regex.toString(); 
            document.getElementById("app").innerHTML =  
            "String Value: " + "<b>" + rex + "</b>"; 
        } 
    </script> 
</body> 
  
</html>                     