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JavaScript Tutorial

JavaScript test() Method: RegExp Object


The test() method of the RegExp executes a search for a match between a regular expression and a specified string. Returns true or false.


Implemented in JavaScript 1.2




RegExp: The name of the regular expression.

str: The string against which to match the regular expression.


The following web document demonstrates how the test() method 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 test Method : Example-1</title>
<h1 style="color: red">JavaScript Regexp test Method</h1>
<hr />
<script type="text/javascript">
//This is done to make the following JavaScript code compatible to XHTML. <![CDATA[
// Create a new RegExp object.
newRe = new RegExp('Fox','g')
// Define a string.
str1 = 'The Quick Brown Fox Jumps Over The Lazy Dog';
// Check whether regular expression exists in the string.
if (newRe.test(str1))
document.write("'Fox' is found in "+str1);

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.

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