w3resource logo

JavaScript prototype Property

JavaScript prototype Property : RegExp Object


Seondary Nav


The prototype property of Regexp object is used to add new properties and methods to all instances of a class.


Implemented in JavaScript 1.1



Example :

The following web document demonstrates how the prototype property can be used.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
<title>JavaScript Regexp prototype Property : Example-1</title>
<h1 style="color: red">JavaScript Regexp prototype Property</h1>
<hr />
<script type="text/javascript">
//This is done to make the following JavaScript code compatible to XHTML. <![CDATA[
//Create a new property called newprop.
RegExp.newprop = null;
var exp1 = new RegExp("JavaScript");
exp1.newprop = "Html Tutorial";
document.write("The value of newprop is : " +exp1.newprop);

View the example in the browser

Supported Browser

Internet Explorer 7 Firefox 3.6 Google Chrome 7 Safari 5.0.1 Opera 10
Yes Yes Yes Yes Yes

See also :

JavaScript Core objects, methods, properties.


Looking for some other tutorial?