JavaScript lastIndex Property: RegExp Object

Last update on August 19 2022 21:50:37 (UTC/GMT +8 hours)

Description

The lastIndex property is a read/write integer of RegExp object specifies the index at which to start the next match.

Version

Implemented in JavaScript 1.2

Syntax

RegExp.lastIndex

Example:

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

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
<title>JavaScript Regexp lastIndex Property : Example-1</title>
</head>
<body>
<h1 style="color: red">JavaScript lastIndex constructor Property</h1>
<hr />
<script type="text/javascript">
//This is done to make the following JavaScript code compatible to XHTML. <![CDATA[
// Declare a regular expression for “The”
rexp=/The*/g;
// Declare a string.
str1 = "The Quick Brown Fox Jumps Over The Lazy Dog";
// Executes search for pattern match with exec() and store result in an array array1
array1 = rexp.exec(str1);
document.write("The pattern '"+array1[0] + "' is matched Next match starts at index : " + rexp.lastIndex);
//]]>
</script>
</body>
</html>

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

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