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>                    